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[linuxjm/iptables.git] / draft / man8 / iptables.8

.\"
.\" Man page written by Herve Eychenne <rv@wallfire.org> (May 1999)
.\" It is based on ipchains page.
.\" TODO: add a word for protocol helpers (FTP, IRC, SNMP-ALG)
.\"
.\" ipchains page by Paul ``Rusty'' Russell March 1997
.\" Based on the original ipfwadm man page by Jos Vos <jos@xos.nl>
.\"
.\"     This program is free software; you can redistribute it and/or modify
.\"     it under the terms of the GNU General Public License as published by
.\"     the Free Software Foundation; either version 2 of the License, or
.\"     (at your option) any later version.
.\"
.\"     This program is distributed in the hope that it will be useful,
.\"     but WITHOUT ANY WARRANTY; without even the implied warranty of
.\"     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
.\"     GNU General Public License for more details.
.\"
.\"     You should have received a copy of the GNU General Public License
.\"     along with this program; if not, write to the Free Software
.\"     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
.\"
.\"
.\" Japanese Version Copyright (c) 2001, 2004 Yuichi SATO
.\"         all right reserved.
.\" Translated Sun Jul 29 01:03:37 JST 2001
.\"         by Yuichi SATO <ysato@h4.dion.ne.jp>
.\" Updated & Modified Wed Sep 12 06:22:55 JST 2001 by Yuichi SATO
.\" Updated on Wed May 28 01:51:45 JST 2003 by
.\"    System Design and Research Institute Co., Ltd.
.\" Updated & Modified Sat Feb 21 23:28:25 JST 2004
.\"         by Yuichi SATO <ysato444@yahoo.co.jp>
.\"
.\"WORD:        chain           ¥Á¥§¥¤¥ó
.\"WORD:        built-in chain  ÁȤ߹þ¤ßºÑ¤ß¥Á¥§¥¤¥ó
.\"WORD:        connection tracking     ÀܳÄÉÀ×
.\"WORD:        enslave         ¥¹¥ì¡¼¥Ö¤Ë¤¹¤ë
.\"WORD:        infrastructure  ´ðÈ×
.\"WORD:        round-robin     ¥é¥¦¥ó¥É¡¦¥í¥Ó¥ó
.\"WORD:        rule traverse   ¥ë¡¼¥ë¤Î¸¡Æ¤
.\"WORD:        non-terminating target  Èó½ªÎ»¥¿¡¼¥²¥Ã¥È
.\"WORD:        criteria        ȽÃÇ(¤¹¤ë)´ð½à
.\"
.TH IPTABLES 8 "Mar 09, 2002" "" ""
.\"O .SH NAME
.SH ̾Á°
.\"O iptables \- administration tool for IPv4 packet filtering and NAT
iptables \- IPv4 ¤Î¥Ñ¥±¥Ã¥È¥Õ¥£¥ë¥¿¤È NAT ¤ò´ÉÍý¤¹¤ë¥Ä¡¼¥ë
.\"O .SH SYNOPSIS
.SH ½ñ¼°
.\"O .BR "iptables [-t table] -[AD] " "chain rule-specification [options]"
.BR "iptables [-t table] -[AD] " "¥Á¥§¥¤¥ó ¥ë¡¼¥ë¤Î¾ÜºÙ [¥ª¥×¥·¥ç¥ó]"
.br
.\"O .BR "iptables [-t table] -I " "chain [rulenum] rule-specification [options]"
.BR "iptables [-t table] -I " "¥Á¥§¥¤¥ó [¥ë¡¼¥ëÈÖ¹æ] ¥ë¡¼¥ë¤Î¾ÜºÙ [¥ª¥×¥·¥ç¥ó]"
.br
.\"O .BR "iptables [-t table] -R " "chain rulenum rule-specification [options]"
.BR "iptables [-t table] -R " "¥Á¥§¥¤¥ó ¥ë¡¼¥ëÈÖ¹æ ¥ë¡¼¥ë¤Î¾ÜºÙ [¥ª¥×¥·¥ç¥ó]"
.br
.\"O .BR "iptables [-t table] -D " "chain rulenum [options]"
.BR "iptables [-t table] -D " "¥Á¥§¥¤¥ó ¥ë¡¼¥ëÈÖ¹æ [¥ª¥×¥·¥ç¥ó]"
.br
.\"O .BR "iptables [-t table] -[LFZ] " "[chain] [options]"
.BR "iptables [-t table] -[LFZ] " "[¥Á¥§¥¤¥ó] [¥ª¥×¥·¥ç¥ó]"
.br
.\"O .BR "iptables [-t table] -N " "chain"
.BR "iptables [-t table] -N " "¥Á¥§¥¤¥ó"
.br
.\"O .BR "iptables [-t table] -X " "[chain]"
.BR "iptables [-t table] -X " "[¥Á¥§¥¤¥ó]"
.br
.\"O .BR "iptables [-t table] -P " "chain target [options]"
.BR "iptables [-t table] -P " "¥Á¥§¥¤¥ó ¥¿¡¼¥²¥Ã¥È [¥ª¥×¥·¥ç¥ó]"
.br
.\"O .BR "iptables [-t table] -E " "old-chain-name new-chain-name"
.BR "iptables [-t table] -E " "µì¥Á¥§¥¤¥ó̾ ¿·¥Á¥§¥¤¥ó̾"
.\"O .SH DESCRIPTION
.SH ÀâÌÀ
.\"O .B Iptables
.\"O is used to set up, maintain, and inspect the tables of IP packet
.\"O filter rules in the Linux kernel.  Several different tables
.\"O may be defined.  Each table contains a number of built-in
.\"O chains and may also contain user-defined chains.
.B iptables
¤Ï Linux ¥«¡¼¥Í¥ë¤Î IP ¥Ñ¥±¥Ã¥È¥Õ¥£¥ë¥¿¥ë¡¼¥ë¤Î¥Æ¡¼¥Ö¥ë¤ò
ÀßÄꡦ´ÉÍý¡¦¸¡ºº¤¹¤ë¤¿¤á¤Ë»È¤ï¤ì¤ë¡£
Ê£¿ô¤Î°Û¤Ê¤ë¥Æ¡¼¥Ö¥ë¤òÄêµÁ¤Ç¤­¤ë¡£
³Æ¥Æ¡¼¥Ö¥ë¤Ë¤Ï¤¿¤¯¤µ¤ó¤ÎÁȤ߹þ¤ßºÑ¤ß¥Á¥§¥¤¥ó¤¬´Þ¤Þ¤ì¤Æ¤ª¤ê¡¢
¤µ¤é¤Ë¥æ¡¼¥¶¡¼ÄêµÁ¤Î¥Á¥§¥¤¥ó¤ò²Ã¤¨¤ë¤³¤È¤â¤Ç¤­¤ë¡£

.\"O Each chain is a list of rules which can match a set of packets.  Each
.\"O rule specifies what to do with a packet that matches.  This is called
.\"O a `target', which may be a jump to a user-defined chain in the same
.\"O table.
³Æ¥Á¥§¥¤¥ó¤Ï¡¢¥Ñ¥±¥Ã¥È·²¤Ë¥Þ¥Ã¥Á¤¹¤ë¥ë¡¼¥ë¤Î¥ê¥¹¥È¤Ç¤¢¤ë¡£
³Æ¥ë¡¼¥ë¤Ï¥Þ¥Ã¥Á¤·¤¿¥Ñ¥±¥Ã¥È¤ËÂФ·¤Æ²¿¤ò¤¹¤ë¤«¤ò»ØÄꤹ¤ë¡£
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.\"O .SH TARGETS
.SH ¥¿¡¼¥²¥Ã¥È
.\"O A firewall rule specifies criteria for a packet, and a target.  If the
.\"O packet does not match, the next rule in the chain is the examined; if
.\"O it does match, then the next rule is specified by the value of the
.\"O target, which can be the name of a user-defined chain or one of the
.\"O special values 
.\"O .IR ACCEPT ,
.\"O .IR DROP ,
.\"O .IR QUEUE ,
.\"O or
.\"O .IR RETURN .
¤Ò¤È¤Ä¤Î¥Õ¥¡¥¤¥¢¥¦¥©¡¼¥ë¥ë¡¼¥ë¤Ç¤Ï¡¢
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.IR ACCEPT ,
.IR DROP ,
.IR QUEUE ,
.I RETURN
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.PP
.\"O .I ACCEPT 
.\"O means to let the packet through.
.I ACCEPT 
¤Ï¥Ñ¥±¥Ã¥È¤òÄ̤¹¤È¤¤¤¦°ÕÌ£¤Ç¤¢¤ë¡£
.\"O .I DROP
.\"O means to drop the packet on the floor.
.I DROP
¤Ï¥Ñ¥±¥Ã¥È¤ò¾²¤ËÍ (¼Î¤Æ¤ë) ¤È¤¤¤¦°ÕÌ£¤Ç¤¢¤ë¡£
.\"O .I QUEUE
.\"O means to pass the packet to userspace (if supported by the kernel).
.I QUEUE
¤Ï¥Ñ¥±¥Ã¥È¤ò¥æ¡¼¥¶¡¼¶õ´Ö¤ËÅϤ¹¤È¤¤¤¦°ÕÌ£¤Ç¤¢¤ë
(¥«¡¼¥Í¥ë¤¬¥µ¥Ý¡¼¥È¤·¤Æ¤¤¤ì¤Ð¤Ç¤¢¤ë¤¬)¡£
.\"O .I RETURN
.\"O means stop traversing this chain and resume at the next rule in the
.\"O previous (calling) chain.  If the end of a built-in chain is reached
.\"O or a rule in a built-in chain with target
.\"O .I RETURN
.\"O is matched, the target specified by the chain policy determines the
.\"O fate of the packet.
.I RETURN
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¤Þ¤¿¤ÏÁȤ߹þ¤ßºÑ¤ß¥Á¥§¥¤¥ó¤Ç¥¿¡¼¥²¥Ã¥È
.I RETURN
¤ò»ý¤Ä¥ë¡¼¥ë¤Ë¥Þ¥Ã¥Á¤·¤¿¾ì¹ç¡¢
¥Á¥§¥¤¥ó¥Ý¥ê¥·¡¼¤Ç»ØÄꤵ¤ì¤¿¥¿¡¼¥²¥Ã¥È¤¬
¥Ñ¥±¥Ã¥È¤Î¹ÔÊý¤ò·èÄꤹ¤ë¡£
.\"O .SH TABLES
.SH ¥Æ¡¼¥Ö¥ë
.\"O There are currently three independent tables (which tables are present
.\"O at any time depends on the kernel configuration options and which
.\"O modules are present).
¸½ºß¤Î¤È¤³¤í 3 ¤Ä¤ÎÆÈΩ¤Ê¥Æ¡¼¥Ö¥ë¤¬Â¸ºß¤¹¤ë
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.TP
.BI "-t, --table " "table"
.\"O This option specifies the packet matching table which the command
.\"O should operate on.  If the kernel is configured with automatic module
.\"O loading, an attempt will be made to load the appropriate module for
.\"O that table if it is not already there.
¤³¤Î¥ª¥×¥·¥ç¥ó¤Ï¡¢¤³¤Î¥³¥Þ¥ó¥É¤òŬÍѤ¹¤ë
¥Ñ¥±¥Ã¥È¥Þ¥Ã¥Á¥ó¥°¥Æ¡¼¥Ö¥ë¤ò»ØÄꤹ¤ë¡£
¥«¡¼¥Í¥ë¤Ë¼«Æ°¥â¥¸¥å¡¼¥ë¥í¡¼¥Ç¥£¥ó¥°¤¬ÀßÄꤵ¤ì¤Æ¤¤¤ë¾ì¹ç¡¢
¤½¤Î¥Æ¡¼¥Ö¥ë¤ËÂФ¹¤ëŬÀڤʥ⥸¥å¡¼¥ë¤¬¤Þ¤À¥í¡¼¥É¤µ¤ì¤Æ¤¤¤Ê¤±¤ì¤Ð¡¢
¤½¤Î¥â¥¸¥å¡¼¥ë¤¬¥í¡¼¥É¤µ¤ì¤ë¡£

.\"O The tables are as follows:
¥Æ¡¼¥Ö¥ë¤Ï°Ê²¼¤ÎÄ̤ê¤Ç¤¢¤ë¡£
.RS
.TP .4i
.BR "filter" :
.\"O This is the default table (if no -t option is passed).  It contains
.\"O the built-in chains
.\"O .B INPUT
.\"O (for packets coming into the box itself),
.\"O .B FORWARD
.\"O (for packets being routed through the box), and
.\"O .B OUTPUT
.\"O (for locally-generated packets).
(\-t ¥ª¥×¥·¥ç¥ó¤¬ÅϤµ¤ì¤Ê¤±¤ì¤Ð) ¤³¤ì¤¬¥Ç¥Õ¥©¥ë¥È¤Î¥Æ¡¼¥Ö¥ë¤Ç¤¢¤ë¡£
¤³¤ì¤Ë¤Ï
.B INPUT
(¥Þ¥·¥ó¼«ÂΤËÆþ¤Ã¤Æ¤¯¤ë¥Ñ¥±¥Ã¥È¤ËÂФ¹¤ë¥Á¥§¥¤¥ó)¡¦
.B FORWARD
(¥Þ¥·¥ó¤ò·Ðͳ¤¹¤ë¥Ñ¥±¥Ã¥È¤ËÂФ¹¤ë¥Á¥§¥¤¥ó)¡¦
.B OUTPUT
(¥í¡¼¥«¥ë¥Þ¥·¥ó¤ÇÀ¸À®¤µ¤ì¤¿¥Ñ¥±¥Ã¥È¤ËÂФ¹¤ë¥Á¥§¥¤¥ó)
¤È¤¤¤¦ÁȤ߹þ¤ßºÑ¤ß¥Á¥§¥¤¥ó¤¬´Þ¤Þ¤ì¤ë¡£
.TP
.BR "nat" :
.\"O This table is consulted when a packet that creates a new
.\"O connection is encountered.  It consists of three built-ins:
.\"O .B PREROUTING
.\"O (for altering packets as soon as they come in),
.\"O .B OUTPUT
.\"O (for altering locally-generated packets before routing), and
.\"O .B POSTROUTING
.\"O (for altering packets as they are about to go out).
¤³¤Î¥Æ¡¼¥Ö¥ë¤Ï¿·¤·¤¤Àܳ¤ò³«¤¯¤è¤¦¤Ê¥Ñ¥±¥Ã¥È¤ËÂФ·¤Æ»²¾È¤µ¤ì¤ë¡£
¤³¤ì¤Ë¤Ï
.B PREROUTING
(¥Ñ¥±¥Ã¥È¤¬Æþ¤Ã¤Æ¤­¤¿¾ì¹ç¡¢¤¹¤°¤Ë¤½¤Î¥Ñ¥±¥Ã¥È¤òÊÑ´¹¤¹¤ë¤¿¤á¤Î¥Á¥§¥¤¥ó)¡¦
.B OUTPUT
(¥í¡¼¥«¥ë¤ÇÀ¸À®¤µ¤ì¤¿¥Ñ¥±¥Ã¥È¤ò¥ë¡¼¥Æ¥£¥ó¥°¤ÎÁ°¤ËÊÑ´¹¤¹¤ë¤¿¤á¤Î¥Á¥§¥¤¥ó)¡¦
.B POSTROUTING
(¥Ñ¥±¥Ã¥È¤¬½Ð¤Æ¹Ô¤¯¤È¤­¤ËÊÑ´¹¤¹¤ë¤¿¤á¤Î¥Á¥§¥¤¥ó)
¤È¤¤¤¦ 3 ¤Ä¤ÎÁȤ߹þ¤ßºÑ¤ß¥Á¥§¥¤¥ó¤¬´Þ¤Þ¤ì¤ë¡£
.TP
.BR "mangle" :
.\"O This table is used for specialized packet alteration.  Until kernel
.\"O 2.4.17 it had two built-in chains:
.\"O .B PREROUTING
.\"O (for altering incoming packets before routing) and
.\"O .B OUTPUT
.\"O (for altering locally-generated packets before routing).
.\"O Since kernel 2.4.18, three other built-in chains are also supported:
.\"O .B INPUT
.\"O (for packets coming into the box itself),
.\"O .B FORWARD
.\"O (for altering packets being routed through the box), and
.\"O .B POSTROUTING
.\"O (for altering packets as they are about to go out).
¤³¤Î¥Æ¡¼¥Ö¥ë¤ÏÆÃÊ̤ʥѥ±¥Ã¥ÈÊÑ´¹¤Ë»È¤ï¤ì¤ë¡£
¤³¤ì¤Ë¤Ï¡¢¥«¡¼¥Í¥ë 2.4.17 ¤Þ¤Ç¤Ï
.B PREROUTING
(¥Ñ¥±¥Ã¥È¤¬Æþ¤Ã¤Æ¤­¤¿¾ì¹ç¡¢¤¹¤°¤Ë¤½¤Î¥Ñ¥±¥Ã¥È¤òÊÑ´¹¤¹¤ë¤¿¤á¤Î¥Á¥§¥¤¥ó)¡¦
.B OUTPUT
(¥í¡¼¥«¥ë¤ÇÀ¸À®¤µ¤ì¤¿¥Ñ¥±¥Ã¥È¤ò¥ë¡¼¥Æ¥£¥ó¥°¤ÎÁ°¤ËÊÑ´¹¤¹¤ë¤¿¤á¤Î¥Á¥§¥¤¥ó)
¤È¤¤¤¦ 2 ¤Ä¤ÎÁȤ߹þ¤ßºÑ¤ß¥Á¥§¥¤¥ó¤¬´Þ¤Þ¤ì¤ë¡£
¥«¡¼¥Í¥ë 2.4.18 ¤«¤é¤Ï¡¢¤³¤ì¤é¤Î¾¤Ë
.B INPUT
(¥Þ¥·¥ó¼«ÂΤËÆþ¤Ã¤Æ¤¯¤ë¥Ñ¥±¥Ã¥È¤ËÂФ¹¤ë¥Á¥§¥¤¥ó)¡¦
.B FORWARD
(¥Þ¥·¥ó¤ò·Ðͳ¤¹¤ë¥Ñ¥±¥Ã¥È¤ËÂФ¹¤ë¥Á¥§¥¤¥ó)¡¦
.B POSTROUTING
(¥Ñ¥±¥Ã¥È¤¬½Ð¤Æ¹Ô¤¯¤È¤­¤ËÊÑ´¹¤¹¤ë¤¿¤á¤Î¥Á¥§¥¤¥ó)
¤È¤¤¤¦ 3 ¤Ä¤ÎÁȤ߹þ¤ßºÑ¤ß¥Á¥§¥¤¥ó¤â´Þ¤Þ¤ì¤ë¡£
.RE
.\"O .SH OPTIONS
.SH ¥ª¥×¥·¥ç¥ó
.\"O The options that are recognized by
.\"O .B iptables
.\"O can be divided into several different groups.
.B iptables
¤Ç»È¤¨¤ë¥ª¥×¥·¥ç¥ó¤Ï¡¢¤¤¤¯¤Ä¤«¤Î¥°¥ë¡¼¥×¤Ëʬ¤±¤é¤ì¤ë¡£
.\"O .SS COMMANDS
.SS ¥³¥Þ¥ó¥É
.\"O These options specify the specific action to perform.  Only one of them
.\"O can be specified on the command line unless otherwise specified
.\"O below.  For all the long versions of the command and option names, you
.\"O need to use only enough letters to ensure that
.\"O .B iptables
.\"O can differentiate it from all other options.
¤³¤ì¤é¤Î¥ª¥×¥·¥ç¥ó¤Ï¡¢¼Â¹Ô¤¹¤ëÆÃÄê¤ÎÆ°ºî¤ò»ØÄꤹ¤ë¡£
°Ê²¼¤ÎÀâÌÀ¤ÇÃíµ­¤µ¤ì¤Æ¤¤¤Ê¤¤¸Â¤ê¡¢
¥³¥Þ¥ó¥É¥é¥¤¥ó¤Ç»ØÄê¤Ç¤­¤ë¤Î¤Ï¤³¤ÎÃæ¤Î 1 ¤Ä¤À¤±¤Ç¤¢¤ë¡£
Ť¤¥Ð¡¼¥¸¥ç¥ó¤Î¥³¥Þ¥ó¥É̾¤È¥ª¥×¥·¥ç¥ó̾¤Ï¡¢
.B iptables
¤¬Â¾¤Î¥³¥Þ¥ó¥É̾¤ä¥ª¥×¥·¥ç¥ó̾¤È¶èÊ̤Ǥ­¤ëÈϰϤÇ
(ʸ»ú¤ò¾Êά¤·¤Æ) »ØÄꤹ¤ë¤³¤È¤â¤Ç¤­¤ë¡£
.TP
.\"O .BI "-A, --append " "chain rule-specification"
.BI "-A, --append " "¥Á¥§¥¤¥ó ¥ë¡¼¥ë¤Î¾ÜºÙ"
.\"O Append one or more rules to the end of the selected chain.
.\"O When the source and/or destination names resolve to more than one
.\"O address, a rule will be added for each possible address combination.
ÁªÂò¤µ¤ì¤¿¥Á¥§¥¤¥ó¤ÎºÇ¸å¤Ë 1 ¤Ä°Ê¾å¤Î¥ë¡¼¥ë¤òÄɲ乤롣
Á÷¿®¸µ¤äÁ÷¿®Àè¤Î̾Á°¤¬ 1 ¤Ä°Ê¾å¤Î¥¢¥É¥ì¥¹¤Ë²ò·è¤µ¤ì¤¿¾ì¹ç¤Ï¡¢
²Äǽ¤Ê¥¢¥É¥ì¥¹¤ÎÁȹ礻¤½¤ì¤¾¤ì¤ËÂФ·¤Æ¥ë¡¼¥ë¤¬Äɲ䵤ì¤ë¡£
.TP
.\"O .BI "-D, --delete " "chain rule-specification"
.BI "-D, --delete " "¥Á¥§¥¤¥ó ¥ë¡¼¥ë¤Î¾ÜºÙ"
.ns
.TP
.\"O .BI "-D, --delete " "chain rulenum"
.BI "-D, --delete " "¥Á¥§¥¤¥ó ¥ë¡¼¥ëÈÖ¹æ"
.\"O Delete one or more rules from the selected chain.  There are two
.\"O versions of this command: the rule can be specified as a number in the
.\"O chain (starting at 1 for the first rule) or a rule to match.
ÁªÂò¤µ¤ì¤¿¥Á¥§¥¤¥ó¤«¤é 1 ¤Ä°Ê¾å¤Î¥ë¡¼¥ë¤òºï½ü¤¹¤ë¡£
¤³¤Î¥³¥Þ¥ó¥É¤Ë¤Ï 2 ¤Ä¤Î»È¤¤Êý¤¬¤¢¤ë:
¥Á¥§¥¤¥ó¤ÎÃæ¤ÎÈÖ¹æ (ºÇ½é¤Î¥ë¡¼¥ë¤ò 1 ¤È¤¹¤ë) ¤ò»ØÄꤹ¤ë¾ì¹ç¤È¡¢
¥Þ¥Ã¥Á¤¹¤ë¥ë¡¼¥ë¤ò»ØÄꤹ¤ë¾ì¹ç¤Ç¤¢¤ë¡£
.TP
.\"O .BR "-I, --insert " "\fIchain\fP [\fIrulenum\fP] \fIrule-specification\fP"
.BR  "-I, --insert " "\fI¥Á¥§¥¤¥ó\fP [\fI¥ë¡¼¥ëÈÖ¹æ\fP] \fI¥ë¡¼¥ë¤Î¾ÜºÙ"
.\"O Insert one or more rules in the selected chain as the given rule
.\"O number.  So, if the rule number is 1, the rule or rules are inserted
.\"O at the head of the chain.  This is also the default if no rule number
.\"O is specified.
ÁªÂò¤µ¤ì¤¿¥Á¥§¥¤¥ó¤Ë¥ë¡¼¥ëÈÖ¹æ¤ò»ØÄꤷ¤Æ 1 ¤Ä°Ê¾å¤Î¥ë¡¼¥ë¤òÁÞÆþ¤¹¤ë¡£
¥ë¡¼¥ëÈֹ椬 1 ¤Î¾ì¹ç¡¢¥ë¡¼¥ë¤Ï¥Á¥§¥¤¥ó¤ÎÀèƬ¤ËÁÞÆþ¤µ¤ì¤ë¡£
¤³¤ì¤Ï¥ë¡¼¥ëÈֹ椬»ØÄꤵ¤ì¤Ê¤¤¾ì¹ç¤Î¥Ç¥Õ¥©¥ë¥È¤Ç¤â¤¢¤ë¡£
.TP
.\"O .BI "-R, --replace " "chain rulenum rule-specification"
.BI  "-R, --replace " "¥Á¥§¥¤¥ó ¥ë¡¼¥ëÈÖ¹æ ¥ë¡¼¥ë¤Î¾ÜºÙ"
.\"O Replace a rule in the selected chain.  If the source and/or
.\"O destination names resolve to multiple addresses, the command will
.\"O fail.  Rules are numbered starting at 1.
ÁªÂò¤µ¤ì¤¿¥Á¥§¥¤¥ó¤Ç¥ë¡¼¥ë¤òÃÖ´¹¤¹¤ë¡£
Á÷¿®¸µ¤äÁ÷¿®Àè¤Î̾Á°¤¬ 1 ¤Ä°Ê¾å¤Î¥¢¥É¥ì¥¹¤Ë²ò·è¤µ¤ì¤¿¾ì¹ç¤Ï¡¢
¤³¤Î¥³¥Þ¥ó¥É¤Ï¼ºÇÔ¤¹¤ë¡£¥ë¡¼¥ëÈÖ¹æ¤Ï 1 ¤«¤é¤Ï¤¸¤Þ¤ë¡£
.TP
.\"O .BR "-L, --list " "[\fIchain\fP]"
.BR  "-L, --list " "[\fI¥Á¥§¥¤¥ó\fP]"
.\"O List all rules in the selected chain.  If no chain is selected, all
.\"O chains are listed.  As every other iptables command, it applies to the
.\"O specified table (filter is the default), so NAT rules get listed by
ÁªÂò¤µ¤ì¤¿¥Á¥§¥¤¥ó¤Ë¤¢¤ëÁ´¤Æ¤Î¥ë¡¼¥ë¤ò°ìÍ÷ɽ¼¨¤¹¤ë¡£
¥Á¥§¥¤¥ó¤¬»ØÄꤵ¤ì¤Ê¤¤¾ì¹ç¡¢Á´¤Æ¤Î¥Á¥§¥¤¥ó¤Ë¤¢¤ë¥ê¥¹¥È¤¬°ìÍ÷ɽ¼¨¤µ¤ì¤ë¡£
¾¤Î³Æ iptables ¥³¥Þ¥ó¥É¤ÈƱÍͤˡ¢»ØÄꤵ¤ì¤¿¥Æ¡¼¥Ö¥ë
(¥Ç¥Õ¥©¥ë¥È¤Ï filter) ¤ËÂФ·¤ÆºîÍѤ¹¤ë¡£
¤è¤Ã¤Æ NAT ¥ë¡¼¥ë¤òɽ¼¨¤¹¤ë¤Ë¤Ï°Ê²¼¤Î¤è¤¦¤Ë¤¹¤ë¡£
.nf
 iptables -t nat -n -L
.fi
.\"O Please note that it is often used with the
.\"O .B -n
.\"O option, in order to avoid long reverse DNS lookups.
DNS¤ÎµÕ°ú¤­¤òÈò¤±¤ë¤¿¤á¤Ë¡¢¤è¤¯
.B -n
¥ª¥×¥·¥ç¥ó¤È¶¦¤Ë»ÈÍѤµ¤ì¤ë¡£
.\"O It is legal to specify the
.\"O .B -Z
.\"O (zero) option as well, in which case the chain(s) will be atomically
.\"O listed and zeroed.  The exact output is affected by the other
.\"O arguments given. The exact rules are suppressed until you use
.\"O .br
.\"O  iptables -L -v
.\"O .br
.B -Z
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.nf
 iptables -L -v
.fi
¤ò»È¤ï¤Ê¤¤¸Â¤ê (ÌõÃí: -v ¥ª¥×¥·¥ç¥ó¤ò»ØÄꤷ¤Ê¤¤¸Â¤ê)¡¢
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.TP
.\"O .BR "-F, --flush " "[\fIchain\fP]"
.BR "-F, --flush " "[\fI¥Á¥§¥¤¥ó\fP]"
.\"O Flush the selected chain (all the chains in the table if none is given).
.\"O This is equivalent to deleting all the rules one by one.
ÁªÂò¤µ¤ì¤¿¥Á¥§¥¤¥ó(²¿¤â»ØÄꤷ¤Ê¤±¤ì¤Ð¥Æ¡¼¥Ö¥ëÆâ¤ÎÁ´¤Æ¤Î¥Á¥§¥¤¥ó)
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¤³¤ì¤ÏÁ´¤Æ¤Î¥ë¡¼¥ë¤ò 1 ¸Ä¤º¤Äºï½ü¤¹¤ë¤Î¤ÈƱ¤¸¤Ç¤¢¤ë¡£
.TP
.\"O .BR "-Z, --zero " "[\fIchain\fP]"
.BR "-Z, --zero " "[\fI¥Á¥§¥¤¥ó\fP]"
.\"O Zero the packet and byte counters in all chains.  It is legal to
.\"O specify the
.\"O .B "-L, --list"
.\"O (list) option as well, to see the counters immediately before they are
.\"O cleared. (See above.)
¤¹¤Ù¤Æ¤Î¥Á¥§¥¤¥ó¤Î¥Ñ¥±¥Ã¥È¥«¥¦¥ó¥¿¤È¥Ð¥¤¥È¥«¥¦¥ó¥¿¤ò¥¼¥í¤Ë¤¹¤ë¡£
¥¯¥ê¥¢¤µ¤ì¤ëľÁ°¤Î¥«¥¦¥ó¥¿¤ò¸«¤ë¤¿¤á¤Ë¡¢
.B "-L, --list"
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.TP
.\"O .BI "-N, --new-chain " "chain"
.BI "-N, --new-chain " "¥Á¥§¥¤¥ó"
.\"O Create a new user-defined chain by the given name.  There must be no
.\"O target of that name already.
»ØÄꤷ¤¿Ì¾Á°¤Ç¥æ¡¼¥¶¡¼ÄêµÁ¥Á¥§¥¤¥ó¤òºîÀ®¤¹¤ë¡£
Ʊ¤¸Ì¾Á°¤Î¥¿¡¼¥²¥Ã¥È¤¬´û¤Ë¸ºß¤·¤Æ¤Ï¤Ê¤é¤Ê¤¤¡£
.TP
.\"O .BR "-X, --delete-chain " "[\fIchain\fP]"
.BR "-X, --delete-chain " "[\fI¥Á¥§¥¤¥ó\fP]"
.\"O Delete the optional user-defined chain specified.  There must be no references
.\"O to the chain.  If there are, you must delete or replace the referring
.\"O rules before the chain can be deleted.  If no argument is given, it
.\"O will attempt to delete every non-builtin chain in the table.
»ØÄꤷ¤¿¥æ¡¼¥¶¡¼ÄêµÁ¥Á¥§¥¤¥ó¤òºï½ü¤¹¤ë¡£
¤½¤Î¥Á¥§¥¤¥ó¤¬»²¾È¤µ¤ì¤Æ¤¤¤Æ¤Ï¤Ê¤é¤Ê¤¤¡£
¥Á¥§¥¤¥ó¤òºï½ü¤¹¤ëÁ°¤Ë¡¢¤½¤Î¥Á¥§¥¤¥ó¤ò»²¾È¤·¤Æ¤¤¤ë¥ë¡¼¥ë¤ò
ºï½ü¤¹¤ë¤«ÃÖ¤­´¹¤¨¤ë¤«¤·¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤¡£
°ú¤­¿ô¤¬Í¿¤¨¤é¤ì¤Ê¤¤¾ì¹ç¡¢¥Æ¡¼¥Ö¥ë¤Ë¤¢¤ë¥Á¥§¥¤¥ó¤Î¤¦¤Á
ÁȤ߹þ¤ßºÑ¤ß¥Á¥§¥¤¥ó¤Ç¤Ê¤¤¤â¤Î¤òÁ´¤Æºï½ü¤¹¤ë¡£
.TP
.\"O .BI "-P, --policy " "chain target"
.BI "-P, --policy " "¥Á¥§¥¤¥ó ¥¿¡¼¥²¥Ã¥È"
.\"O Set the policy for the chain to the given target.  See the section
.\"O .B TARGETS
.\"O for the legal targets.  Only built-in (non-user-defined) chains can have
.\"O policies, and neither built-in nor user-defined chains can be policy
.\"O targets.
¥Á¥§¥¤¥ó¤Î¥Ý¥ê¥·¡¼¤ò¡¢»ØÄꤷ¤¿¥¿¡¼¥²¥Ã¥È¤ËÀßÄꤹ¤ë¡£
»ØÄê²Äǽ¤Ê¥¿¡¼¥²¥Ã¥È¤Ï¡Ö\fB¥¿¡¼¥²¥Ã¥È\fR¡×¤Î¾Ï¤ò»²¾È¤¹¤ë¤³¤È¡£
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¤Þ¤¿¡¢ÁȤ߹þ¤ßºÑ¤ß¥Á¥§¥¤¥ó¤â¥æ¡¼¥¶¡¼ÄêµÁ¥Á¥§¥¤¥ó¤â
¥Ý¥ê¥·¡¼¤Î¥¿¡¼¥²¥Ã¥È¤ËÀßÄꤹ¤ë¤³¤È¤Ï¤Ç¤­¤Ê¤¤¡£
.TP
.\"O .BI "-E, --rename-chain " "old-chain new-chain"
.BI  "-E, --rename-chain " "µì¥Á¥§¥¤¥ó̾ ¿·¥Á¥§¥¤¥ó̾"
.\"O Rename the user specified chain to the user supplied name.  This is
.\"O cosmetic, and has no effect on the structure of the table.
¥æ¡¼¥¶¡¼ÄêµÁ¥Á¥§¥¤¥ó¤ò»ØÄꤷ¤¿Ì¾Á°¤ËÊѹ¹¤¹¤ë¡£
¤³¤ì¤Ï¸«¤¿ÌܤÀ¤±¤ÎÊѹ¹¤Ê¤Î¤Ç¡¢¥Æ¡¼¥Ö¥ë¤Î¹½Â¤¤Ë¤Ï²¿¤â±Æ¶Á¤·¤Ê¤¤¡£
.TP
.B -h
.\"O Help.
.\"O Give a (currently very brief) description of the command syntax.
¥Ø¥ë¥×¡£
(º£¤Î¤È¤³¤í¤Ï¤È¤Æ¤â´Êñ¤Ê) ¥³¥Þ¥ó¥É½ñ¼°¤ÎÀâÌÀ¤òɽ¼¨¤¹¤ë¡£
.\"O .SS PARAMETERS
.SS ¥Ñ¥é¥á¡¼¥¿
.\"O The following parameters make up a rule specification (as used in the
.\"O add, delete, insert, replace and append commands).
°Ê²¼¤Î¥Ñ¥é¥á¡¼¥¿¤Ï (add, delete, insert, 
replace, append ¥³¥Þ¥ó¥É¤ÇÍѤ¤¤é¤ì¤Æ) ¥ë¡¼¥ë¤Î»ÅÍͤò·è¤á¤ë¡£
.TP
.BR "-p, --protocol " "[!] \fIprotocol\fP"
.\"O The protocol of the rule or of the packet to check.
.\"O The specified protocol can be one of
.\"O .IR tcp ,
.\"O .IR udp ,
.\"O .IR icmp ,
.\"O or
.\"O .IR all ,
.\"O or it can be a numeric value, representing one of these protocols or a
.\"O different one.  A protocol name from /etc/protocols is also allowed.
¥ë¡¼¥ë¤Ç»È¤ï¤ì¤ë¥×¥í¥È¥³¥ë¡¢¤Þ¤¿¤Ï¥Á¥§¥Ã¥¯¤µ¤ì¤ë¥Ñ¥±¥Ã¥È¤Î¥×¥í¥È¥³¥ë¡£
»ØÄê¤Ç¤­¤ë¥×¥í¥È¥³¥ë¤Ï¡¢
.IR tcp ,
.IR udp ,
.IR icmp ,
.I all
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.\"O A "!" argument before the protocol inverts the
.\"O test.  The number zero is equivalent to
.\"O .IR all .
.\"O Protocol
.\"O .I all
.\"O will match with all protocols and is taken as default when this
.\"O option is omitted.
¥×¥í¥È¥³¥ë¤ÎÁ°¤Ë "!" ¤òÃÖ¤¯¤È¡¢¤½¤Î¥×¥í¥È¥³¥ë¤ò½ü³°¤¹¤ë¤È¤¤¤¦°ÕÌ£¤Ë¤Ê¤ë¡£
¿ôÃÍ 0 ¤Ï
.I all
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.I all
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.TP
.BR "-s, --source " "[!] \fIaddress\fP[/\fImask\fP]"
.\"O Source specification.
.\"O .I Address
.\"O can be either a network name, a hostname (please note that specifying
.\"O any name to be resolved with a remote query such as DNS is a really bad idea),
.\"O a network IP address (with /mask), or a plain IP address.
Á÷¿®¸µ¤Î»ØÄê¡£
.I address
¤Ï¥Û¥¹¥È̾
(DNS ¤Î¤è¤¦¤Ê¥ê¥â¡¼¥È¤Ø¤ÎÌ䤤¹ç¤ï¤»¤Ç²ò·è¤¹¤ë̾Á°¤ò»ØÄꤹ¤ë¤Î¤ÏÈó¾ï¤ËÎɤ¯¤Ê¤¤)
¡¦¥Í¥Ã¥È¥ï¡¼¥¯ IP ¥¢¥É¥ì¥¹ (/mask ¤ò»ØÄꤹ¤ë)¡¦
Ä̾ï¤Î IP ¥¢¥É¥ì¥¹¡¢¤Î¤¤¤º¤ì¤«¤Ç¤¢¤ë¡£
.\"O The
.\"O .I mask
.\"O can be either a network mask or a plain number,
.\"O specifying the number of 1's at the left side of the network mask.
.I mask
¤Ï¥Í¥Ã¥È¥ï¡¼¥¯¥Þ¥¹¥¯¤«¡¢
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.\"O Thus, a mask of
.\"O .I 24
.\"O is equivalent to
.\"O .IR 255.255.255.0 .
¤Ä¤Þ¤ê¡¢
.I 24
¤È¤¤¤¦ mask ¤Ï
.I 255.255.255.0
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.\"O A "!" argument before the address specification inverts the sense of
.\"O the address. The flag
.\"O .B --src
.\"O is an alias for this option.
¥¢¥É¥ì¥¹»ØÄê¤ÎÁ°¤Ë "!" ¤òÃÖ¤¯¤È¡¢¤½¤Î¥¢¥É¥ì¥¹¤ò½ü³°¤¹¤ë¤È¤¤¤¦°ÕÌ£¤Ë¤Ê¤ë¡£
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.B --src
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.TP
.BR "-d, --destination " "[!] \fIaddress\fP[/\fImask\fP]"
.\"O Destination specification. 
.\"O See the description of the
.\"O .B -s
.\"O (source) flag for a detailed description of the syntax.  The flag
.\"O .B --dst
.\"O is an alias for this option.
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.B -s
(Á÷¿®¸µ) ¥Õ¥é¥°¤ÎÀâÌÀ¤ò»²¾È¤¹¤ë¤³¤È¡£
¥Õ¥é¥°
.B --dst
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.TP
.BI "-j, --jump " "target"
.\"O This specifies the target of the rule; i.e., what to do if the packet
.\"O matches it.  The target can be a user-defined chain (other than the
.\"O one this rule is in), one of the special builtin targets which decide
.\"O the fate of the packet immediately, or an extension (see
.\"O .B EXTENSIONS
.\"O below).  If this
.\"O option is omitted in a rule, then matching the rule will have no
.\"O effect on the packet's fate, but the counters on the rule will be
.\"O incremented.
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¥Ñ¥±¥Ã¥È¤¬¥Þ¥Ã¥Á¤·¤¿¾ì¹ç¤Ë¤É¤¦¤¹¤ë¤«¤ò»ØÄꤹ¤ë¡£
¥¿¡¼¥²¥Ã¥È¤Ï¥æ¡¼¥¶¡¼ÄêµÁ¥Á¥§¥¤¥ó
(¤½¤Î¥ë¡¼¥ë¼«¿È¤¬Æþ¤Ã¤Æ¤¤¤ë¥Á¥§¥¤¥ó°Ê³°) ¤Ç¤â¡¢
¥Ñ¥±¥Ã¥È¤Î¹ÔÊý¤ò¨»þ¤Ë·èÄꤹ¤ëÆÃÊ̤ÊÁȤ߹þ¤ßºÑ¤ß¥¿¡¼¥²¥Ã¥È¤Ç¤â¡¢
³ÈÄ¥¤µ¤ì¤¿¥¿¡¼¥²¥Ã¥È (°Ê²¼¤Î
.RB ¡Ö ¥¿¡¼¥²¥Ã¥È¤Î³ÈÄ¥ ¡×
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.TP
.BR "-i, --in-interface " "[!] \fIname\fP"
.\"O Name of an interface via which a packet is going to be received (only for
.\"O packets entering the 
.\"O .BR INPUT ,
.\"O .B FORWARD
.\"O and
.\"O .B PREROUTING
.\"O chains).
¥Ñ¥±¥Ã¥È¤ò¼õ¿®¤¹¤ë¤³¤È¤Ë¤Ê¤ë¥¤¥ó¥¿¡¼¥Õ¥§¡¼¥¹Ì¾
.RB ( INPUT ,
.BR FORWARD ,
.B PREROUTING
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.\"O When the "!" argument is used before the interface name, the
.\"O sense is inverted.  If the interface name ends in a "+", then any
.\"O interface which begins with this name will match.  If this option is
.\"O omitted, any interface name will match.
¥¤¥ó¥¿¡¼¥Õ¥§¡¼¥¹Ì¾¤ÎÁ°¤Ë "!" ¤òÃÖ¤¯¤È¡¢
¤½¤Î¥¤¥ó¥¿¡¼¥Õ¥§¡¼¥¹¤ò½ü³°¤¹¤ë¤È¤¤¤¦°ÕÌ£¤Ë¤Ê¤ë¡£
¥¤¥ó¥¿¡¼¥Õ¥§¡¼¥¹Ì¾¤¬ "+" ¤Ç½ª¤Ã¤Æ¤¤¤ë¾ì¹ç¡¢
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¤³¤Î¥ª¥×¥·¥ç¥ó¤¬¾Êά¤µ¤ì¤¿¾ì¹ç¡¢
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.TP
.BR "-o, --out-interface " "[!] \fIname\fP"
.\"O Name of an interface via which a packet is going to be sent (for packets
.\"O entering the
.\"O .BR FORWARD ,
.\"O .B OUTPUT
.\"O and
.\"O .B POSTROUTING
.\"O chains).
¥Ñ¥±¥Ã¥È¤òÁ÷¿®¤¹¤ë¤³¤È¤Ë¤Ê¤ë¥¤¥ó¥¿¡¼¥Õ¥§¡¼¥¹Ì¾
.RB ( FORWARD ,
.BR OUTPUT , 
.B POSTROUTING
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.\"O When the "!" argument is used before the interface name, the
.\"O sense is inverted.  If the interface name ends in a "+", then any
.\"O interface which begins with this name will match.  If this option is
.\"O omitted, any interface name will match.
¥¤¥ó¥¿¡¼¥Õ¥§¡¼¥¹Ì¾¤ÎÁ°¤Ë "!" ¤òÃÖ¤¯¤È¡¢
¤½¤Î¥¤¥ó¥¿¡¼¥Õ¥§¡¼¥¹¤ò½ü³°¤¹¤ë¤È¤¤¤¦°ÕÌ£¤Ë¤Ê¤ë¡£
¥¤¥ó¥¿¡¼¥Õ¥§¡¼¥¹Ì¾¤¬ "+" ¤Ç½ª¤Ã¤Æ¤¤¤ë¾ì¹ç¡¢
¤½¤Î̾Á°¤Ç»Ï¤Þ¤ëǤ°Õ¤Î¥¤¥ó¥¿¡¼¥Õ¥§¡¼¥¹Ì¾¤Ë¥Þ¥Ã¥Á¤¹¤ë¡£
¤³¤Î¥ª¥×¥·¥ç¥ó¤¬¾Êά¤µ¤ì¤¿¾ì¹ç¡¢
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.TP
.B "[!] " "-f, --fragment"
.\"O This means that the rule only refers to second and further fragments
.\"O of fragmented packets.  Since there is no way to tell the source or
.\"O destination ports of such a packet (or ICMP type), such a packet will
.\"O not match any rules which specify them.  When the "!" argument
.\"O precedes the "-f" flag, the rule will only match head fragments, or
.\"O unfragmented packets.
¤³¤Î¥ª¥×¥·¥ç¥ó¤Ï¡¢Ê¬³ä¤µ¤ì¤¿¥Ñ¥±¥Ã¥È (fragmented packet) ¤Î¤¦¤Á
2 ÈÖÌܰʹߤΥѥ±¥Ã¥È¤À¤±¤ò»²¾È¤¹¤ë¥ë¡¼¥ë¤Ç¤¢¤ë¤³¤È¤ò°ÕÌ£¤¹¤ë¡£
¤³¤Î¤è¤¦¤Ê¥Ñ¥±¥Ã¥È (¤Þ¤¿¤Ï ICMP ¥¿¥¤¥×¤Î¥Ñ¥±¥Ã¥È) ¤Ï
Á÷¿®¸µ¡¦Á÷¿®Àè¥Ý¡¼¥È¤òÃΤëÊýË¡¤¬¤Ê¤¤¤Î¤Ç¡¢
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"-f" ¥Õ¥é¥°¤ÎÁ°¤Ë "!" ¤òÃÖ¤¯¤È¡¢
ʬ³ä¤µ¤ì¤¿¥Ñ¥±¥Ã¥È¤Î¤¦¤ÁºÇ½é¤Î¤â¤Î¤«¡¢
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.TP
.BI "-c, --set-counters " "PKTS BYTES"
.\"O This enables the administrator to initialize the packet and byte
.\"O counters of a rule (during
.\"O .B INSERT,
.\"O .B APPEND,
.\"O .B REPLACE
.\"O operations).
¤³¤Î¥ª¥×¥·¥ç¥ó¤ò»È¤¦¤È¡¢
.RB ( insert ,
.BR append ,
.B replace
Áàºî¤Ë¤ª¤¤¤Æ) ´ÉÍý¼Ô¤Ï¥Ñ¥±¥Ã¥È¥«¥¦¥ó¥¿¤È¥Ð¥¤¥È¥«¥¦¥ó¥¿¤ò
½é´ü²½¤¹¤ë¤³¤È¤¬¤Ç¤­¤ë¡£
.\"O .SS "OTHER OPTIONS"
.SS ¤½¤Î¾¤Î¥ª¥×¥·¥ç¥ó
.\"O The following additional options can be specified:
¤½¤Î¾¤Ë°Ê²¼¤Î¥ª¥×¥·¥ç¥ó¤ò»ØÄꤹ¤ë¤³¤È¤¬¤Ç¤­¤ë:
.TP
.B "-v, --verbose"
.\"O Verbose output.  This option makes the list command show the interface
.\"O name, the rule options (if any), and the TOS masks.  The packet and
.\"O byte counters are also listed, with the suffix 'K', 'M' or 'G' for
.\"O 1000, 1,000,000 and 1,000,000,000 multipliers respectively (but see
.\"O the
.\"O .B -x
.\"O flag to change this).
.\"O For appending, insertion, deletion and replacement, this causes
.\"O detailed information on the rule or rules to be printed.
¾ÜºÙ¤Ê½ÐÎϤò¹Ô¤¦¡£
list ¥³¥Þ¥ó¥É¤ÎºÝ¤Ë¡¢¥¤¥ó¥¿¡¼¥Õ¥§¡¼¥¹Ì¾¡¦
(¤â¤·¤¢¤ì¤Ð) ¥ë¡¼¥ë¤Î¥ª¥×¥·¥ç¥ó¡¦TOS ¥Þ¥¹¥¯¤òɽ¼¨¤µ¤»¤ë¡£
¥Ñ¥±¥Ã¥È¤È¥Ð¥¤¥È¥«¥¦¥ó¥¿¤âɽ¼¨¤µ¤ì¤ë¡£
ź»ú 'K', 'M', 'G' ¤Ï¡¢
¤½¤ì¤¾¤ì 1000, 1,000,000, 1,000,000,000 Çܤòɽ¤¹
(¤³¤ì¤òÊѹ¹¤¹¤ë
.B -x
¥Õ¥é¥°¤â¸«¤è)¡£
¤³¤Î¥ª¥×¥·¥ç¥ó¤ò append, insert, delete, replace ¥³¥Þ¥ó¥É¤ËŬÍѤ¹¤ë¤È¡¢
¥ë¡¼¥ë¤Ë¤Ä¤¤¤Æ¤Î¾ÜºÙ¤Ê¾ðÊó¤òɽ¼¨¤¹¤ë¡£
.TP
.B "-n, --numeric"
.\"O Numeric output.
.\"O IP addresses and port numbers will be printed in numeric format.
.\"O By default, the program will try to display them as host names,
.\"O network names, or services (whenever applicable).
¿ôÃͤˤè¤ë½ÐÎϤò¹Ô¤¦¡£
IP ¥¢¥É¥ì¥¹¤ä¥Ý¡¼¥ÈÈÖ¹æ¤ò¿ôÃͤˤè¤ë¥Õ¥©¡¼¥Þ¥Ã¥È¤Çɽ¼¨¤¹¤ë¡£
¥Ç¥Õ¥©¥ë¥È¤Ç¤Ï¡¢iptables ¤Ï (²Äǽ¤Ç¤¢¤ì¤Ð) ¤³¤ì¤é¤Î¾ðÊó¤ò
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.TP
.B "-x, --exact"
.\"O Expand numbers.
.\"O Display the exact value of the packet and byte counters,
.\"O instead of only the rounded number in K's (multiples of 1000)
.\"O M's (multiples of 1000K) or G's (multiples of 1000M).  This option is
.\"O only relevant for the 
.\"O .B -L
.\"O command.
¸·Ì©¤Ê¿ôÃͤÇɽ¼¨¤¹¤ë¡£
¥Ñ¥±¥Ã¥È¥«¥¦¥ó¥¿¤È¥Ð¥¤¥È¥«¥¦¥ó¥¿¤ò¡¢
K (1000 ¤Î²¿Çܤ«)¡¦M (1000K ¤Î²¿Çܤ«)¡¦G (1000M ¤Î²¿Çܤ«) ¤Ç¤Ï¤Ê¤¯¡¢
¸·Ì©¤ÊÃͤÇɽ¼¨¤¹¤ë¡£
¤³¤Î¥ª¥×¥·¥ç¥ó¤Ï¡¢
.B -L
¥³¥Þ¥ó¥É¤È¤·¤«´Ø·¸¤·¤Ê¤¤¡£
.TP
.B "--line-numbers"
.\"O When listing rules, add line numbers to the beginning of each rule,
.\"O corresponding to that rule's position in the chain.
¥ë¡¼¥ë¤ò°ìÍ÷ɽ¼¨¤¹¤ëºÝ¡¢¤½¤Î¥ë¡¼¥ë¤¬¥Á¥§¥¤¥ó¤Î¤É¤Î°ÌÃ֤ˤ¢¤ë¤«¤òɽ¤¹
¹ÔÈÖ¹æ¤ò³Æ¹Ô¤Î»Ï¤á¤ËÉղ乤롣
.TP
.B "--modprobe=command"
.\"O When adding or inserting rules into a chain, use
.\"O .B command
.\"O to load any necessary modules (targets, match extensions, etc).
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(¥¿¡¼¥²¥Ã¥È¤ä¥Þ¥Ã¥Á¥ó¥°¤Î³ÈÄ¥¤Ê¤É¤Ç) ɬÍפʥ⥸¥å¡¼¥ë¤ò¥í¡¼¥É¤¹¤ë¤¿¤á¤Ë»È¤¦
.B command
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.\"O .SH MATCH EXTENSIONS
.SH ¥Þ¥Ã¥Á¥ó¥°¤Î³ÈÄ¥
.\"O iptables can use extended packet matching modules.  These are loaded
.\"O in two ways: implicitly, when
.\"O .B -p
.\"O or
.\"O .B --protocol
.\"O is specified, or with the
.\"O .B -m
.\"O or
.\"O .B --match
.\"O options, followed by the matching module name;
iptables ¤Ï³ÈÄ¥¤µ¤ì¤¿¥Ñ¥±¥Ã¥È¥Þ¥Ã¥Á¥ó¥°¥â¥¸¥å¡¼¥ë¤ò»È¤¦¤³¤È¤¬¤Ç¤­¤ë¡£
¤³¤ì¤é¤Î¥â¥¸¥å¡¼¥ë¤Ï 2 ¼ïÎà¤ÎÊýË¡¤Ç¥í¡¼¥É¤µ¤ì¤ë:
¥â¥¸¥å¡¼¥ë¤Ï¡¢
.B -p
¤Þ¤¿¤Ï
.B --protocol
¤Ç°ÅÌۤΤ¦¤Á¤Ë»ØÄꤵ¤ì¤ë¤«¡¢
.B -m
¤Þ¤¿¤Ï
.B --match
¤Î¸å¤Ë¥â¥¸¥å¡¼¥ë̾¤ò³¤±¤Æ»ØÄꤵ¤ì¤ë¡£
.\"O after these, various
.\"O extra command line options become available, depending on the specific
.\"O module.  You can specify multiple extended match modules in one line,
.\"O and you can use the
.\"O .B -h
.\"O or
.\"O .B --help
.\"O options after the module has been specified to receive help specific
.\"O to that module.
¤³¤ì¤é¤Î¥â¥¸¥å¡¼¥ë¤Î¸å¤í¤Ë¤Ï¡¢¥â¥¸¥å¡¼¥ë¤Ë±þ¤¸¤Æ
¾¤Î¤¤¤í¤¤¤í¤Ê¥³¥Þ¥ó¥É¥é¥¤¥ó¥ª¥×¥·¥ç¥ó¤ò»ØÄꤹ¤ë¤³¤È¤¬¤Ç¤­¤ë¡£
Ê£¿ô¤Î³ÈÄ¥¥Þ¥Ã¥Á¥ó¥°¥â¥¸¥å¡¼¥ë¤ò°ì¹Ô¤Ç»ØÄꤹ¤ë¤³¤È¤¬¤Ç¤­¤ë¡£
¤Þ¤¿¡¢¥â¥¸¥å¡¼¥ë¤ËÆÃÍ­¤Î¥Ø¥ë¥×¤òɽ¼¨¤µ¤»¤ë¤¿¤á¤Ë¤Ï¡¢
¥â¥¸¥å¡¼¥ë¤ò»ØÄꤷ¤¿¸å¤Ç
.B -h
¤Þ¤¿¤Ï
.B --help
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.\"O The following are included in the base package, and most of these can
.\"O be preceded by a
.\"O .B !
.\"O to invert the sense of the match.
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.B !
¤òÁ°¤Ë¤ª¤¯¤³¤È¤Ë¤è¤Ã¤Æ
¥Þ¥Ã¥Á¥ó¥°¤Î°ÕÌ£¤òµÕ¤Ë¤Ç¤­¤ë¡£
.SS ah
.\"O This module matches the SPIs in AH header of IPSec packets.
¤³¤Î¥â¥¸¥å¡¼¥ë¤Ï IPSec ¥Ñ¥±¥Ã¥È¤Î AH ¥Ø¥Ã¥À¡¼¤Î SPI Ãͤ˥ޥåÁ¤¹¤ë¡£ 
.TP
.BR "--ahspi " "[!] \fIspi\fP[:\fIspi\fP]"
.SS conntrack
.\"O This module, when combined with connection tracking, allows access to
.\"O more connection tracking information than the "state" match.
.\"O (this module is present only if iptables was compiled under a kernel
.\"O supporting this feature)
¤³¤Î¥â¥¸¥å¡¼¥ë¤Ï¡¢ÀܳÄÉÀ× (connection tracking) ¤ÈÁȤ߹ç¤ï¤»¤ÆÍѤ¤¤ë¤È¡¢
"state" ¥Þ¥Ã¥Á¤è¤ê¤â¤µ¤é¤Ë¿¤¯¤Î¡¢
¥Ñ¥±¥Ã¥È¤Ë¤Ä¤¤¤Æ¤ÎÀܳÄÉÀ×¾õÂÖ¤òÃΤ뤳¤È¤¬¤Ç¤­¤ë
(¤³¤Îµ¡Ç½¤ò¥µ¥Ý¡¼¥È¤·¤¿¥«¡¼¥Í¥ë¤Î¤â¤È¤Ç iptables ¤¬¥³¥ó¥Ñ¥¤¥ë¤µ¤ì¤¿¾ì¹ç
¤Ë¤Î¤ß¡¢¤³¤Î¥â¥¸¥å¡¼¥ë¤Ï¸ºß¤¹¤ë)¡£
.TP
.BI "--ctstate " "state"
.\"O Where state is a comma separated list of the connection states to
.\"O match. Possible states are
.\"O .B INVALID
.\"O meaning that the packet could not be identified for some reason which
.\"O includes running out of memory and ICMP errors which don't correspond to any
.\"O known connection,
.\"O .B ESTABLISHED
.\"O meaning that the packet is associated with a connection which has seen
.\"O packets in both directions,
state ¤Ï¡¢¥Þ¥Ã¥Á¥ó¥°ÂоݤȤʤ롢¥³¥ó¥Þ¶èÀÚ¤ê¤ÎÀܳ¾õÂ֥ꥹ¥È¤Ç¤¢¤ë¡£
»ØÄê²Äǽ¤Ê state ¤Ï°Ê²¼¤ÎÄ̤ꡣ
.BR INVALID :
¥á¥â¥ê¤ò»È¤¤²Ì¤¿¤·¤¿°Ù¤ä¡¢
´ûÃΤÎÀܳ¤È¤ÏÂбþ¤·¤Ê¤¤ ICMP ¥¨¥é¡¼¤Ê¤É¡¢
²¿¤é¤«¤ÎÍýͳ¤Ë¤è¤ê¥Ñ¥±¥Ã¥È¤¬¼±Ê̤Ǥ­¤Ê¤¤¡£
.BR ESTABLISHED :
¤³¤Î¥Ñ¥±¥Ã¥È¤Ï¡¢²áµîÁÐÊý¸þ¤Ë¥Ñ¥±¥Ã¥È¤¬¤ä¤ê¼è¤ê¤µ¤ì¤¿Àܳ¤Ë°¤¹¤ë¥Ñ¥±¥Ã¥È¤Ç¤¢¤ë¡£
.\"O .B NEW
.\"O meaning that the packet has started a new connection, or otherwise
.\"O associated with a connection which has not seen packets in both
.\"O directions, and
.BR NEW :
¤³¤Î¥Ñ¥±¥Ã¥È¤¬¿·¤·¤¤Àܳ¤ò³«»Ï¤·¤¿¤«¡¢
ÁÐÊý¸þ¤Ë¤Ï¥Ñ¥±¥Ã¥È¤¬¤ä¤ê¼è¤ê¤µ¤ì¤Æ¤¤¤Ê¤¤Àܳ¤Ë°¤¹¤ë¥Ñ¥±¥Ã¥È¤Ç¤¢¤ë¡£
.\"O .B RELATED
.\"O meaning that the packet is starting a new connection, but is
.\"O associated with an existing connection, such as an FTP data transfer,
.\"O or an ICMP error.
.BR RELATED :
¤³¤Î¥Ñ¥±¥Ã¥È¤¬¿·¤·¤¤Àܳ¤ò³«»Ï¤·¤Æ¤¤¤ë¤¬¡¢
FTP ¥Ç¡¼¥¿Å¾Á÷¤ä ICMP ¥¨¥é¡¼¤Î¤è¤¦¤Ë¡¢´û¸¤ÎÀܳ¤Ë´Ø·¸¤·¤Æ¤¤¤ë¡£
.\"O .B SNAT
.\"O A virtual state, matching if the original source address differs from
.\"O the reply destination.
.BR SNAT :
²¾ÁÛŪ¤Ê¾õÂ֤Ǥ¢¤ê¡¢½ñ¤­´¹¤¨Á°¤ÎÁ÷¿®¸µ¥¢¥É¥ì¥¹¤¬±þÅú¤Î°¸À襢¥É¥ì¥¹¤È
°Û¤Ê¤ë¾ì¹ç¤Ë¥Þ¥Ã¥Á¤¹¤ë¡£
.\"O .B DNAT
.\"O A virtual state, matching if the original destination differs from the
.\"O reply source.
.BR DNAT :
²¾ÁÛŪ¤Ê¾õÂ֤Ǥ¢¤ê¡¢½ñ¤­´¹¤¨Á°¤Î°¸À襢¥É¥ì¥¹¤¬±þÅú¤ÎÁ÷¿®¸µ¥¢¥É¥ì¥¹¤È
°Û¤Ê¤ë¾ì¹ç¤Ë¥Þ¥Ã¥Á¤¹¤ë¡£
.TP
.BI "--ctproto " "proto"
.\"O Protocol to match (by number or name)
(̾Á°¤Þ¤¿¤Ï¿ôÃͤÇ) »ØÄꤵ¤ì¤¿¥×¥í¥È¥³¥ë¤Ë¥Þ¥Ã¥Á¤¹¤ë¡£
.TP
.BI "--ctorigsrc " "[!] \fIaddress\fP[/\fImask\fP]"
.\"O Match against original source address
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.TP
.BI "--ctorigdst " "[!] \fIaddress\fP[/\fImask\fP]"
.\"O Match against original destination address
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.TP
.BI "--ctreplsrc " "[!] \fIaddress\fP[/\fImask\fP]"
.\"O Match against reply source address
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.TP
.BI "--ctrepldst " "[!] \fIaddress\fB[/\fImask\fP]"
.\"O Match against reply destination address
±þÅú¤Î°¸À襢¥É¥ì¥¹¤Ë¥Þ¥Ã¥Á¤¹¤ë¡£
.TP
.BI "--ctstatus " "[\fINONE|EXPECTED|SEEN_REPLY|ASSURED\fP][,...]"
.\"O Match against internal conntrack states
ÀܳÄÉÀפÎÆâÉôŪ¤Ê¾õÂ֤˥ޥåÁ¤¹¤ë¡£
.TP
.BI "--ctexpire " "\fItime\fP[\fI:time\fP]"
.\"O Match remaining lifetime in seconds against given value
.\"O or range of values (inclusive)
Í­¸ú´ü´Ö¤Î»Ä¤êÉÿô¡¢¤Þ¤¿¤Ï¤½¤ÎÈÏ°Ï(ξü¤ò´Þ¤à)¤Ë¥Þ¥Ã¥Á¤¹¤ë¡£
.SS dscp
.\"O This module matches the 6 bit DSCP field within the TOS field in the
.\"O IP header.  DSCP has superseded TOS within the IETF.
¤³¤Î¥â¥¸¥å¡¼¥ë¤Ï¡¢IP ¥Ø¥Ã¥À¡¼¤Î TOS ¥Õ¥£¡¼¥ë¥ÉÆâ¤Ë¤¢¤ë¡¢
6 bit ¤Î DSCP ¥Õ¥£¡¼¥ë¥É¤Ë¥Þ¥Ã¥Á¤¹¤ë¡£
IETF ¤Ç¤Ï DSCP ¤¬ TOS ¤Ë¼è¤Ã¤ÆÂå¤ï¤Ã¤¿¡£
.TP
.BI "--dscp " "value"
.\"O Match against a numeric (decimal or hex) value [0-32].
.\"O motoki: patch [JM:12854]
(10 ¿Ê¤Þ¤¿¤Ï 16 ¿Ê¤Î) ¿ôÃÍ [0\-63] ¤Ë¥Þ¥Ã¥Á¤¹¤ë¡£
.TP
.BI "--dscp-class " "\fIDiffServ Class\fP"
.\"O Match the DiffServ class. This value may be any of the
.\"O BE, EF, AFxx or CSx classes.  It will then be converted
.\"O into it's according numeric value.
DiffServ ¥¯¥é¥¹¤Ë¥Þ¥Ã¥Á¤¹¤ë¡£
ÃÍ¤Ï BE, EF, AFxx, CSx ¥¯¥é¥¹¤Î¤¤¤º¤ì¤«¤Ç¤¢¤ë¡£
¤³¤ì¤é¤Ï¡¢Âбþ¤¹¤ë¿ôÃͤǻØÄꤹ¤ë¤Î¤ÈƱ¤¸¤Ç¤¢¤ë¡£
.SS esp
.\"O This module matches the SPIs in ESP header of IPSec packets.
¤³¤Î¥â¥¸¥å¡¼¥ë¤Ï IPSec ¥Ñ¥±¥Ã¥È¤Î ESP ¥Ø¥Ã¥À¡¼¤Î SPI Ãͤ˥ޥåÁ¤¹¤ë¡£ 
.TP
.BR "--espspi " "[!] \fIspi\fP[:\fIspi\fP]"
.SS helper
.\"O This module matches packets related to a specific conntrack-helper.
¤³¤Î¥â¥¸¥å¡¼¥ë¤Ï¡¢»ØÄꤵ¤ì¤¿ÀܳÄÉÀץإë¥Ñ¡¼¥â¥¸¥å¡¼¥ë¤Ë
´ØÏ¢¤¹¤ë¥Ñ¥±¥Ã¥È¤Ë¥Þ¥Ã¥Á¤¹¤ë¡£
.TP
.BI "--helper " "string"
.\"O Matches packets related to the specified conntrack-helper.
»ØÄꤵ¤ì¤¿ÀܳÄÉÀץإë¥Ñ¡¼¥â¥¸¥å¡¼¥ë¤Ë
´ØÏ¢¤¹¤ë¥Ñ¥±¥Ã¥È¤Ë¥Þ¥Ã¥Á¤¹¤ë¡£
.RS
.PP
.\"O string can be "ftp" for packets related to a ftp-session on default port.
.\"O For other ports append -portnr to the value, ie. "ftp-2121".
¥Ç¥Õ¥©¥ë¥È¤Î¥Ý¡¼¥È¤ò»È¤Ã¤¿ ftp-¥»¥Ã¥·¥ç¥ó¤Ë´ØÏ¢¤¹¤ë¥Ñ¥±¥Ã¥È¤Ç¤Ï¡¢
string ¤Ë "ftp" ¤È½ñ¤±¤ë¡£
¾¤Î¥Ý¡¼¥È¤Ç¤Ï "\-¥Ý¡¼¥ÈÈÖ¹æ" ¤òÃͤËÉÕ¤±²Ã¤¨¤ë¡£
¤¹¤Ê¤ï¤Á "ftp-2121" ¤È¤Ê¤ë¡£
.PP
.\"O Same rules apply for other conntrack-helpers.
¾¤ÎÀܳÄÉÀץإë¥Ñ¡¼¤Ç¤âƱ¤¸¥ë¡¼¥ë¤¬Å¬ÍѤµ¤ì¤ë¡£
.RE
.SS icmp
.\"O This extension is loaded if `--protocol icmp' is specified.  It
.\"O provides the following option:
¤³¤Î³ÈÄ¥¤Ï `--protocol icmp' ¤¬»ØÄꤵ¤ì¤¿¾ì¹ç¤Ë¥í¡¼¥É¤µ¤ì¡¢
°Ê²¼¤Î¥ª¥×¥·¥ç¥ó¤¬Ä󶡤µ¤ì¤ë:
.TP
.BR "--icmp-type " "[!] \fItypename\fP"
.\"O This allows specification of the ICMP type, which can be a numeric
.\"O ICMP type, or one of the ICMP type names shown by the command
¿ôÃͤΠICMP ¥¿¥¤¥×¡¢¤Þ¤¿¤Ï¥³¥Þ¥ó¥É
.nf
 iptables -p icmp -h
.fi
¤Çɽ¼¨¤µ¤ì¤ë ICMP ¥¿¥¤¥×̾¤ò»ØÄê¤Ç¤­¤ë¡£
.SS length
.\"O This module matches the length of a packet against a specific value
.\"O or range of values.
¤³¤Î¥â¥¸¥å¡¼¥ë¤Ï¡¢»ØÄꤵ¤ì¤¿¥Ñ¥±¥Ã¥ÈĹ¡¢¤Þ¤¿¤Ï¤½¤ÎÈϰϤ˥ޥåÁ¤¹¤ë¡£
.TP
.BR "--length " "\fIlength\fP[:\fIlength\fP]"
.SS limit
.\"O This module matches at a limited rate using a token bucket filter.
¤³¤Î¥â¥¸¥å¡¼¥ë¤Ï¡¢¥È¡¼¥¯¥ó¥Ð¥±¥Ä¥Õ¥£¥ë¥¿¤ò»È¤¤¡¢
ñ°Ì»þ´Ö¤¢¤¿¤êÀ©¸Â¤µ¤ì¤¿²ó¿ô¤À¤±¥Þ¥Ã¥Á¤¹¤ë¡£
.\"O A rule using this extension will match until this limit is reached
.\"O (unless the `!' flag is used).  It can be used in combination with the
.\"O .B LOG
.\"O target to give limited logging, for example.
¤³¤Î³ÈÄ¥¤ò»È¤Ã¤¿¥ë¡¼¥ë¤Ï¡¢(`!' ¥Õ¥é¥°¤¬»ØÄꤵ¤ì¤Ê¤¤¸Â¤ê)
À©¸Â¤Ë㤹¤ë¤Þ¤Ç¥Þ¥Ã¥Á¤¹¤ë¡£
¤³¤Î¥â¥¸¥å¡¼¥ë¤ÏÎ㤨¤Ð¡¢¥í¥°µ­Ï¿¤òÀ©¸Â¤¹¤ë¤¿¤á¤Ë
.B LOG
¥¿¡¼¥²¥Ã¥È¤ÈÁȤ߹ç¤ï¤»¤Æ»È¤¦¤³¤È¤¬¤Ç¤­¤ë¡£
.TP
.BI "--limit " "rate"
.\"O Maximum average matching rate: specified as a number, with an optional
.\"O `/second', `/minute', `/hour', or `/day' suffix; the default is
.\"O 3/hour.
ñ°Ì»þ´Ö¤¢¤¿¤ê¤ÎÊ¿¶Ñ¥Þ¥Ã¥Á²ó¿ô¤ÎºÇÂçÃÍ¡£
¿ôÃͤǻØÄꤵ¤ì¡¢Åº»ú `/second', `/minute',
`/hour', `/day' ¤òÉÕ¤±¤ë¤³¤È¤â¤Ç¤­¤ë¡£
¥Ç¥Õ¥©¥ë¥È¤Ï 3/hour ¤Ç¤¢¤ë¡£
.TP
.BI "--limit-burst " "number"
.\"O Maximum initial number of packets to match: this number gets
.\"O recharged by one every time the limit specified above is not reached,
.\"O up to this number; the default is 5.
¥Ñ¥±¥Ã¥È¤¬¥Þ¥Ã¥Á¤¹¤ë²ó¿ô¤ÎºÇÂç½é´üÃÍ:
¥Þ¥Ã¥Á²ó¿ô¤ÎºÇÂçÃͤϡ¢
¾å¤Î¥ª¥×¥·¥ç¥ó¤Ç»ØÄꤷ¤¿À©¸Â¤Ë㤷¤Ê¤±¤ì¤Ð¡¢
¤½¤ÎÅÙ¤´¤È¤Ë¡¢¤³¤Î¿ôÃͤˤʤë¤Þ¤Ç 1 ¸Ä¤º¤ÄÁý¤ä¤µ¤ì¤ë¡£
¥Ç¥Õ¥©¥ë¥È¤Ï 5 ¤Ç¤¢¤ë¡£
.SS mac
.TP
.BR "--mac-source " "[!] \fIaddress\fP"
.\"O Match source MAC address.  It must be of the form XX:XX:XX:XX:XX:XX.
.\"O Note that this only makes sense for packets coming from an Ethernet device
.\"O and entering the
.\"O .BR PREROUTING ,
.\"O .B FORWARD
.\"O or
.\"O .B INPUT
.\"O chains.
Á÷¿®¸µ MAC ¥¢¥É¥ì¥¹¤Ë¥Þ¥Ã¥Á¤¹¤ë¡£
.I address
¤Ï XX:XX:XX:XX:XX:XX ¤È¤¤¤¦·Á¼°¤Ç¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤¡£
¥¤¡¼¥µ¡¼¥Í¥Ã¥È¥Ç¥Ð¥¤¥¹¤«¤éÆþ¤Ã¤Æ¤¯¤ë¥Ñ¥±¥Ã¥È¤Ç¡¢
.BR PREROUTING ,
.BR FORWARD ,
.B INPUT
¥Á¥§¥¤¥ó¤ËÆþ¤ë¥Ñ¥±¥Ã¥È¤Ë¤·¤«°ÕÌ£¤¬¤Ê¤¤¡£
.SS mark
.\"O This module matches the netfilter mark field associated with a packet
.\"O (which can be set using the
.\"O .B MARK
.\"O target below).
¤³¤Î¥â¥¸¥å¡¼¥ë¤Ï¥Ñ¥±¥Ã¥È¤Ë´ØÏ¢¤Å¤±¤é¤ì¤¿
netfilter ¤Î mark ¥Õ¥£¡¼¥ë¥É¤Ë¥Þ¥Ã¥Á¤¹¤ë
(¤³¤Î¥Õ¥£¡¼¥ë¥É¤Ï¡¢°Ê²¼¤Î
.B MARK
¥¿¡¼¥²¥Ã¥È¤ÇÀßÄꤵ¤ì¤ë)¡£
.TP
.BR "--mark " "\fIvalue\fP[/\fImask\fP]"
.\"O Matches packets with the given unsigned mark value (if a mask is
.\"O specified, this is logically ANDed with the mask before the
.\"O comparison).
»ØÄꤵ¤ì¤¿Éä¹æ¤Ê¤· mark ÃͤΥѥ±¥Ã¥È¤Ë¥Þ¥Ã¥Á¤¹¤ë
(mask ¤¬»ØÄꤵ¤ì¤ë¤È¡¢Èæ³Ó¤ÎÁ°¤Ë mask ¤È¤ÎÏÀÍýÀÑ (AND) ¤¬¤È¤é¤ì¤ë)¡£
.SS multiport
.\"O This module matches a set of source or destination ports.  Up to 15
.\"O ports can be specified.  It can only be used in conjunction with
.\"O .B "-p tcp"
.\"O or
.\"O .BR "-p udp" .
¤³¤Î¥â¥¸¥å¡¼¥ë¤ÏÁ÷¿®¸µ¤äÁ÷¿®Àè¤Î¥Ý¡¼¥È¤Î½¸¹ç¤Ë¥Þ¥Ã¥Á¤¹¤ë¡£
¥Ý¡¼¥È¤Ï 15 ¸Ä¤Þ¤Ç»ØÄê¤Ç¤­¤ë¡£
¤³¤Î¥â¥¸¥å¡¼¥ë¤Ï
.B "-p tcp"
¤Þ¤¿¤Ï
.B "-p udp"
¤ÈÁȤ߹ç¤ï¤»¤Æ»È¤¦¤³¤È¤·¤«¤Ç¤­¤Ê¤¤¡£
.TP
.BR "--source-ports " "\fIport\fP[,\fIport\fP[,\fIport\fP...]]"
.\"O Match if the source port is one of the given ports.  The flag
.\"O .B --sports
.\"O is a convenient alias for this option.
Á÷¿®¸µ¥Ý¡¼¥È¤¬»ØÄꤵ¤ì¤¿¥Ý¡¼¥È¤Î¤¦¤Á¤Î¤¤¤º¤ì¤«¤Ç¤¢¤ì¤Ð¥Þ¥Ã¥Á¤¹¤ë¡£
¥Õ¥é¥°
.B --sports
¤Ï¡¢¤³¤Î¥ª¥×¥·¥ç¥ó¤ÎÊØÍø¤ÊÊÌ̾¤Ç¤¢¤ë¡£
.TP
.BR "--destination-ports " "\fIport\fP[,\fIport\fP[,\fIport\fP...]]"
.\"O Match if the destination port is one of the given ports.  The flag
.\"O .B --dports
.\"O is a convenient alias for this option.
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¥Õ¥é¥°
.B --dports
¤Ï¡¢¤³¤Î¥ª¥×¥·¥ç¥ó¤ÎÊØÍø¤ÊÊÌ̾¤Ç¤¢¤ë¡£
.TP
.BR "--ports " "\fIport\fP[,\fIport\fP[,\fIport\fP...]]"
.\"O Match if the both the source and destination ports are equal to each
.\"O other and to one of the given ports.
Á÷¿®¸µ¥Ý¡¼¥È¤È°¸Àè¥Ý¡¼¥È¤¬Åù¤·¤¯¡¢
¤«¤Ä¤½¤Î¥Ý¡¼¥È¤¬»ØÄꤵ¤ì¤¿¥Ý¡¼¥È¤Î¤¦¤Á¤Î¤¤¤º¤ì¤«¤Ç¤¢¤ì¤Ð¥Þ¥Ã¥Á¤¹¤ë¡£
.SS owner
.\"O This module attempts to match various characteristics of the packet
.\"O creator, for locally-generated packets.  It is only valid in the
.\"O .B OUTPUT
.\"O chain, and even this some packets (such as ICMP ping responses) may
.\"O have no owner, and hence never match.
¤³¤Î¥â¥¸¥å¡¼¥ë¤Ï¡¢¥í¡¼¥«¥ë¤ÇÀ¸À®¤µ¤ì¤¿¥Ñ¥±¥Ã¥È¤ËÉÕ¤¤¤Æ¡¢
¥Ñ¥±¥Ã¥ÈÀ¸À®¼Ô¤Î¤¤¤í¤¤¤í¤ÊÆÃÀ­¤ËÂФ·¤Æ¥Þ¥Ã¥Á¤ò¹Ô¤¦¡£
¤³¤ì¤Ï
.B OUTPUT
¥Á¥§¥¤¥ó¤Î¤ß¤Ç¤·¤«Í­¸ú¤Ç¤Ê¤¤¡£
¤Þ¤¿¡¢(ICMP ping ±þÅú¤Î¤è¤¦¤Ê) ¥Ñ¥±¥Ã¥È¤Ï¡¢
½êÍ­¼Ô¤¬¤¤¤Ê¤¤¤Î¤ÇÀäÂФ˥ޥåÁ¤·¤Ê¤¤¡£
.TP
.BI "--uid-owner " "userid"
.\"O Matches if the packet was created by a process with the given
.\"O effective user id.
»ØÄꤵ¤ì¤¿¼Â¸ú¥æ¡¼¥¶¡¼ ID ¤Î¥×¥í¥»¥¹¤Ë¤è¤ê
¥Ñ¥±¥Ã¥È¤¬À¸À®¤µ¤ì¤Æ¤¤¤ë¾ì¹ç¤Ë¥Þ¥Ã¥Á¤¹¤ë¡£
.TP
.BI "--gid-owner " "groupid"
.\"O Matches if the packet was created by a process with the given
.\"O effective group id.
»ØÄꤵ¤ì¤¿¼Â¸ú¥°¥ë¡¼¥× ID ¤Î¥×¥í¥»¥¹¤Ë¤è¤ê
¥Ñ¥±¥Ã¥È¤¬À¸À®¤µ¤ì¤Æ¤¤¤ë¾ì¹ç¤Ë¥Þ¥Ã¥Á¤¹¤ë¡£
.TP
.BI "--pid-owner " "processid"
.\"O Matches if the packet was created by a process with the given
.\"O process id.
»ØÄꤵ¤ì¤¿¥×¥í¥»¥¹ ID ¤Î¥×¥í¥»¥¹¤Ë¤è¤ê
¥Ñ¥±¥Ã¥È¤¬À¸À®¤µ¤ì¤Æ¤¤¤ë¾ì¹ç¤Ë¥Þ¥Ã¥Á¤¹¤ë¡£
.TP
.BI "--sid-owner " "sessionid"
.\"O Matches if the packet was created by a process in the given session
.\"O group.
»ØÄꤵ¤ì¤¿¥»¥Ã¥·¥ç¥ó¥°¥ë¡¼¥×¤Î¥×¥í¥»¥¹¤Ë¤è¤ê
¥Ñ¥±¥Ã¥È¤¬À¸À®¤µ¤ì¤Æ¤¤¤ë¾ì¹ç¤Ë¥Þ¥Ã¥Á¤¹¤ë¡£
.TP
.BI "--cmd-owner " "name"
.\"O Matches if the packet was created by a process with the given command name.
.\"O (this option is present only if iptables was compiled under a kernel
.\"O supporting this feature)
»ØÄꤵ¤ì¤¿¥³¥Þ¥ó¥É̾¤ò»ý¤Ä¥×¥í¥»¥¹¤Ë¤è¤ê
¥Ñ¥±¥Ã¥È¤¬À¸À®¤µ¤ì¤Æ¤¤¤ë¾ì¹ç¤Ë¥Þ¥Ã¥Á¤¹¤ë
(¤³¤Îµ¡Ç½¤ò¥µ¥Ý¡¼¥È¤·¤¿¥«¡¼¥Í¥ë¤Î¤â¤È¤Ç iptables ¤¬¥³¥ó¥Ñ¥¤¥ë¤µ¤ì¤¿¾ì¹ç
¤Ë¤Î¤ß¡¢¤³¤Î¥â¥¸¥å¡¼¥ë¤Ï¸ºß¤¹¤ë)¡£
.SS physdev
.\"O This module matches on the bridge port input and output devices enslaved
.\"O to a bridge device. This module is a part of the infrastructure that enables
.\"O a transparent bridging IP firewall and is only useful for kernel versions
.\"O above version 2.5.44.
¤³¤Î¥â¥¸¥å¡¼¥ë¤Ï¡¢¥Ö¥ê¥Ã¥¸¥Ç¥Ð¥¤¥¹¤Î¥¹¥ì¡¼¥Ö¤Ë¤µ¤ì¤¿¡¢
¥Ö¥ê¥Ã¥¸¥Ý¡¼¥È¤ÎÆþ½ÐÎϥǥХ¤¥¹¤Ë¥Þ¥Ã¥Á¤¹¤ë¡£
¤³¤Î¥â¥¸¥å¡¼¥ë¤Ï¡¢¥Ö¥ê¥Ã¥¸¤Ë¤è¤ëÆ©²áŪ¤Ê
IP ¥Õ¥¡¥¤¥¢¥¦¥©¡¼¥ë¤Î´ðÈפΰìÉô¤Ç¤¢¤ê¡¢
¥«¡¼¥Í¥ë¥Ð¡¼¥¸¥ç¥ó 2.5.44 °Ê¹ß¤Ç¤Î¤ßÍ­¸ú¤Ç¤¢¤ë¡£
.TP
.B --physdev-in name
.\"O Name of a bridge port via which a packet is received (only for
.\"O packets entering the
.\"O .BR INPUT ,
.\"O .B FORWARD
.\"O and
.\"O .B PREROUTING
.\"O chains). If the interface name ends in a "+", then any
.\"O interface which begins with this name will match. If the packet didn't arrive
.\"O through a bridge device, this packet won't match this option, unless '!' is used.
¥Ñ¥±¥Ã¥È¤¬¼õ¿®¤µ¤ì¤ë¥Ö¥ê¥Ã¥¸¤Î¥Ý¡¼¥È̾
.RB ( INPUT ,
.BR FORWARD ,
.B PREROUTING
¥Á¥§¥¤¥ó¤ËÆþ¤ë¥Ñ¥±¥Ã¥È¤Î¤ß)¡£
¥¤¥ó¥¿¡¼¥Õ¥§¡¼¥¹Ì¾¤¬ "+" ¤Ç½ª¤Ã¤Æ¤¤¤ë¾ì¹ç¡¢
¤½¤Î̾Á°¤Ç»Ï¤Þ¤ëǤ°Õ¤Î¥¤¥ó¥¿¡¼¥Õ¥§¡¼¥¹Ì¾¤Ë¥Þ¥Ã¥Á¤¹¤ë¡£
¥Ö¥ê¥Ã¥¸¥Ç¥Ð¥¤¥¹¤òÄ̤·¤Æ¼õ¤±¼è¤é¤ì¤Ê¤«¤Ã¤¿¥Ñ¥±¥Ã¥È¤Ï¡¢
\&'!' ¤¬»ØÄꤵ¤ì¤Æ¤¤¤Ê¤¤¸Â¤ê¡¢¤³¤Î¥ª¥×¥·¥ç¥ó¤Ë¥Þ¥Ã¥Á¤·¤Ê¤¤¡£
.\"O sato: ºÇ¸å¤Î°ìʸ¤Ï°ÕÌõ¤®¤ß¤«¤â
.TP
.B --physdev-out name
.\"O Name of a bridge port via which a packet is going to be sent (for packets
.\"O entering the
.\"O .BR FORWARD ,
.\"O .B OUTPUT
.\"O and
.\"O .B POSTROUTING
.\"O chains).  If the interface name ends in a "+", then any
.\"O interface which begins with this name will match. Note that in the
.\"O .BR nat " and " mangle
.\"O .B OUTPUT
.\"O chains one cannot match on the bridge output port, however one can in the
.\"O .B "filter OUTPUT"
.\"O chain. If the packet won't leave by a bridge device or it is yet unknown what
.\"O the output device will be, then the packet won't match this option, unless
.\"O '!' is used.
¥Ñ¥±¥Ã¥È¤òÁ÷¿®¤¹¤ë¤³¤È¤Ë¤Ê¤ë¥Ö¥ê¥Ã¥¸¤Î¥Ý¡¼¥È̾
.RB ( FORWARD ,
.BR OUTPUT , 
.B POSTROUTING
¥Á¥§¥¤¥ó¤ËÆþ¤ë¥Ñ¥±¥Ã¥È¤Î¤ß)¡£ 
¥¤¥ó¥¿¡¼¥Õ¥§¡¼¥¹Ì¾¤¬ "+" ¤Ç½ª¤Ã¤Æ¤¤¤ë¾ì¹ç¡¢
¤½¤Î̾Á°¤Ç»Ï¤Þ¤ëǤ°Õ¤Î¥¤¥ó¥¿¡¼¥Õ¥§¡¼¥¹Ì¾¤Ë¥Þ¥Ã¥Á¤¹¤ë¡£
.B nat
¤È
.B mangle
¥Æ¡¼¥Ö¥ë¤Î
.B OUTPUT
¥Á¥§¥¤¥ó¤Ç¤Ï¥Ö¥ê¥Ã¥¸¤Î½ÐÎϥݡ¼¥È¤Ë¥Þ¥Ã¥Á¤µ¤»¤ë¤³¤È¤¬¤Ç¤­¤Ê¤¤¤¬¡¢
.B filter
¥Æ¡¼¥Ö¥ë¤Î
.B OUPUT
¥Á¥§¥¤¥ó¤Ç¤Ï¥Þ¥Ã¥Á²Äǽ¤Ç¤¢¤ë¡£
¥Ñ¥±¥Ã¥È¤¬¥Ö¥ê¥Ã¥¸¥Ç¥Ð¥¤¥¹¤«¤éÁ÷¤é¤ì¤Ê¤«¤Ã¤¿¾ì¹ç¡¢
¤Þ¤¿¤Ï¥Ñ¥±¥Ã¥È¤Î½ÐÎϥǥХ¤¥¹¤¬ÉÔÌÀ¤Ç¤¢¤Ã¤¿¾ì¹ç¤Ï¡¢
\&'!' ¤¬»ØÄꤵ¤ì¤Æ¤¤¤Ê¤¤¸Â¤ê¡¢¥Ñ¥±¥Ã¥È¤Ï¤³¤Î¥ª¥×¥·¥ç¥ó¤Ë¥Þ¥Ã¥Á¤·¤Ê¤¤¡£
.TP
.B --physdev-is-in
.\"O Matches if the packet has entered through a bridge interface.
¥Ñ¥±¥Ã¥È¤¬¥Ö¥ê¥Ã¥¸¥¤¥ó¥¿¡¼¥Õ¥§¡¼¥¹¤ËÆþ¤Ã¤¿¾ì¹ç¤Ë¥Þ¥Ã¥Á¤¹¤ë¡£
.TP
.B --physdev-is-out
.\"O Matches if the packet will leave through a bridge interface.
¥Ñ¥±¥Ã¥È¤¬¥Ö¥ê¥Ã¥¸¥¤¥ó¥¿¡¼¥Õ¥§¡¼¥¹¤«¤é½Ð¤è¤¦¤È¤·¤¿¾ì¹ç¤Ë¥Þ¥Ã¥Á¤¹¤ë¡£
.TP
.B --physdev-is-bridged
.\"O Matches if the packet is being bridged and therefore is not being routed.
.\"O This is only useful in the FORWARD and POSTROUTING chains.
¥Ñ¥±¥Ã¥È¤¬¥Ö¥ê¥Ã¥¸¤µ¤ì¤ë¤³¤È¤Ë¤è¤ê¡¢
¥ë¡¼¥Æ¥£¥ó¥°¤µ¤ì¤Ê¤«¤Ã¤¿¾ì¹ç¤Ë¥Þ¥Ã¥Á¤¹¤ë¡£
¤³¤ì¤Ï FORWARD, POSTROUTING ¥Á¥§¥¤¥ó¤Ë¤ª¤¤¤Æ¤Î¤ßÌòΩ¤Ä¡£
.SS pkttype
.\"O This module matches the link-layer packet type.
¤³¤Î¥â¥¸¥å¡¼¥ë¤Ï¡¢¥ê¥ó¥¯ÁؤΥѥ±¥Ã¥È¥¿¥¤¥×¤Ë¥Þ¥Ã¥Á¤¹¤ë¡£
.TP
.BI "--pkt-type " "[\fIunicast\fP|\fIbroadcast\fP|\fImulticast\fP]"
.SS state
.\"O This module, when combined with connection tracking, allows access to
.\"O the connection tracking state for this packet.
¤³¤Î¥â¥¸¥å¡¼¥ë¤Ï¡¢ÀܳÄÉÀ× (connection tracking) ¤ÈÁȤ߹ç¤ï¤»¤ÆÍѤ¤¤ë¤È¡¢
¥Ñ¥±¥Ã¥È¤Ë¤Ä¤¤¤Æ¤ÎÀܳÄÉÀ×¾õÂÖ¤òÃΤ뤳¤È¤¬¤Ç¤­¤ë¡£
.TP
.BI "--state " "state"
.\"O Where state is a comma separated list of the connection states to
.\"O match.  Possible states are 
.\"O .B INVALID
.\"O meaning that the packet is associated with no known connection,
.\"O .B ESTABLISHED
.\"O meaning that the packet is associated with a connection which has seen
.\"O packets in both directions,
state ¤Ï¡¢¥Þ¥Ã¥Á¥ó¥°¤ò¹Ô¤¦¤¿¤á¤Î¡¢¥³¥ó¥Þ¤Ç¶èÀÚ¤é¤ì¤¿Àܳ¾õÂ֤Υꥹ¥È¤Ç¤¢¤ë¡£
»ØÄê²Äǽ¤Ê state ¤Ï°Ê²¼¤ÎÄ̤ꡣ
.BR INVALID :
¤³¤Î¥Ñ¥±¥Ã¥È¤Ï´ûÃΤÎÀܳ¤È´Ø·¸¤·¤Æ¤¤¤Ê¤¤¡£
.BR ESTABLISHED :
¤³¤Î¥Ñ¥±¥Ã¥È¤Ï¡¢²áµîÁÐÊý¸þ¤Ë¥Ñ¥±¥Ã¥È¤¬¤ä¤ê¼è¤ê¤µ¤ì¤¿Àܳ¤Ë°¤¹¤ë¥Ñ¥±¥Ã¥È¤Ç¤¢¤ë¡£
.\"O .B NEW
.\"O meaning that the packet has started a new connection, or otherwise
.\"O associated with a connection which has not seen packets in both
.\"O directions, and
.BR NEW :
¤³¤Î¥Ñ¥±¥Ã¥È¤¬¿·¤·¤¤Àܳ¤ò³«»Ï¤·¤¿¤«¡¢
ÁÐÊý¸þ¤Ë¤Ï¥Ñ¥±¥Ã¥È¤¬¤ä¤ê¼è¤ê¤µ¤ì¤Æ¤¤¤Ê¤¤Àܳ¤Ë°¤¹¤ë¥Ñ¥±¥Ã¥È¤Ç¤¢¤ë¡£
.\"O .B RELATED
.\"O meaning that the packet is starting a new connection, but is
.\"O associated with an existing connection, such as an FTP data transfer,
.\"O or an ICMP error.
.BR RELATED :
¤³¤Î¥Ñ¥±¥Ã¥È¤¬¿·¤·¤¤Àܳ¤ò³«»Ï¤·¤Æ¤¤¤ë¤¬¡¢
FTP ¥Ç¡¼¥¿Å¾Á÷¤ä ICMP ¥¨¥é¡¼¤Î¤è¤¦¤Ë¡¢´û¸¤ÎÀܳ¤Ë´Ø·¸¤·¤Æ¤¤¤ë¡£
.SS tcp
.\"O These extensions are loaded if `--protocol tcp' is specified. It
.\"O provides the following options:
¤³¤ì¤é¤Î³ÈÄ¥¤Ï `--protocol tcp' ¤¬»ØÄꤵ¤ì¾ì¹ç¤Ë¥í¡¼¥É¤µ¤ì¡¢
°Ê²¼¤Î¥ª¥×¥·¥ç¥ó¤¬Ä󶡤µ¤ì¤ë:
.TP
.BR "--source-port " "[!] \fIport\fP[:\fIport\fP]"
.\"O Source port or port range specification. This can either be a service
.\"O name or a port number. An inclusive range can also be specified,
.\"O using the format
.\"O .IR port : port .
Á÷¿®¸µ¥Ý¡¼¥È¤Þ¤¿¤Ï¥Ý¡¼¥ÈÈϰϤλØÄê¡£
¥µ¡¼¥Ó¥¹Ì¾¤Þ¤¿¤Ï¥Ý¡¼¥ÈÈÖ¹æ¤ò»ØÄê¤Ç¤­¤ë¡£
.IR port : port
¤È¤¤¤¦·Á¼°¤Ç¡¢2 ¤Ä¤ÎÈÖ¹æ¤ò´Þ¤àÈϰϤò»ØÄꤹ¤ë¤³¤È¤â¤Ç¤­¤ë¡£
.\"O If the first port is omitted, "0" is assumed; if the last is omitted,
.\"O "65535" is assumed.
.\"O If the second port greater then the first they will be swapped.
.\"O The flag
.\"O .B --sport
.\"O is a convenient alias for this option.
ºÇ½é¤Î¥Ý¡¼¥È¤ò¾Êά¤·¤¿¾ì¹ç¡¢"0" ¤ò²¾Äꤹ¤ë¡£
ºÇ¸å¤Î¥Ý¡¼¥È¤ò¾Êά¤·¤¿¾ì¹ç¡¢"65535" ¤ò²¾Äꤹ¤ë¡£
ºÇ½é¤Î¥Ý¡¼¥È¤¬ºÇ¸å¤Î¥Ý¡¼¥È¤è¤êÂ礭¤¤¾ì¹ç¡¢2 ¤Ä¤ÏÆþ¤ì´¹¤¨¤é¤ì¤ë¡£
.\"tsekine ¸¶Ê¸¤¬´Ö°ã¤Ã¤Æ¤½¤¦
¥Õ¥é¥°
.B --sport
¤Ï¡¢¤³¤Î¥ª¥×¥·¥ç¥ó¤ÎÊØÍø¤ÊÊÌ̾¤Ç¤¢¤ë¡£
.TP
.BR "--destination-port " "[!] \fIport\fP[:\fIport\fP]"
.\"O Destination port or port range specification.  The flag
.\"O .B --dport
.\"O is a convenient alias for this option.
Á÷¿®Àè¥Ý¡¼¥È¤Þ¤¿¤Ï¥Ý¡¼¥ÈÈϰϤλØÄê¡£
¥Õ¥é¥°
.B --dport
¤Ï¡¢¤³¤Î¥ª¥×¥·¥ç¥ó¤ÎÊØÍø¤ÊÊÌ̾¤Ç¤¢¤ë¡£
.TP
.BR "--tcp-flags " "[!] \fImask\fP \fIcomp\fP"
.\"O Match when the TCP flags are as specified.  The first argument is the
.\"O flags which we should examine, written as a comma-separated list, and
.\"O the second argument is a comma-separated list of flags which must be
.\"O set.  Flags are:
.\"O .BR "SYN ACK FIN RST URG PSH ALL NONE" .
TCP ¥Õ¥é¥°¤¬»ØÄꤵ¤ì¤¿¤â¤Î¤ÈÅù¤·¤¤¾ì¹ç¤Ë¥Þ¥Ã¥Á¤¹¤ë¡£
Âè 1 °ú¤­¿ô¤Ïɾ²ÁÂоݤȤ¹¤ë¥Õ¥é¥°¤Ç¡¢¥³¥ó¥Þ¶èÀÚ¤ê¤Î¥ê¥¹¥È¤Ç¤¢¤ë¡£
Âè 2 °ú¤­¿ô¤Ï¤³¤Î¤¦¤ÁÀßÄꤵ¤ì¤Æ¤¤¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤¥Õ¥é¥°¤Ç¡¢
¥³¥ó¥Þ¶èÀÚ¤ê¤Î¥ê¥¹¥È¤Ç¤¢¤ë¡£
»ØÄê¤Ç¤­¤ë¥Õ¥é¥°¤Ï
.B "SYN ACK FIN RST URG PSH ALL NONE"
¤Ç¤¢¤ë¡£
.\"O Hence the command
.\"O .nf
.\"O  iptables -A FORWARD -p tcp --tcp-flags SYN,ACK,FIN,RST SYN
.\"O .fi
.\"O will only match packets with the SYN flag set, and the ACK, FIN and
.\"O RST flags unset.
¤è¤Ã¤Æ¡¢¥³¥Þ¥ó¥É
.nf
 iptables -A FORWARD -p tcp --tcp-flags SYN,ACK,FIN,RST SYN
.fi
¤Ï¡¢SYN ¥Õ¥é¥°¤¬ÀßÄꤵ¤ì ACK, FIN, RST ¥Õ¥é¥°¤¬ÀßÄꤵ¤ì¤Æ¤¤¤Ê¤¤
¥Ñ¥±¥Ã¥È¤Ë¤Î¤ß¥Þ¥Ã¥Á¤¹¤ë¡£
.TP
.B "[!] --syn"
.\"O Only match TCP packets with the SYN bit set and the ACK and RST bits
.\"O cleared.  Such packets are used to request TCP connection initiation;
.\"O for example, blocking such packets coming in an interface will prevent
.\"O incoming TCP connections, but outgoing TCP connections will be
.\"O unaffected.
.\"O It is equivalent to \fB--tcp-flags SYN,RST,ACK SYN\fP.
.\"O If the "!" flag precedes the "--syn", the sense of the
.\"O option is inverted.
SYN ¥Ó¥Ã¥È¤¬ÀßÄꤵ¤ì ACK ¤È RST ¥Ó¥Ã¥È¤¬¥¯¥ê¥¢¤µ¤ì¤Æ¤¤¤ë
TCP ¥Ñ¥±¥Ã¥È¤Ë¤Î¤ß¥Þ¥Ã¥Á¤¹¤ë¡£
¤³¤Î¤è¤¦¤Ê¥Ñ¥±¥Ã¥È¤Ï TCP Àܳ¤Î³«»ÏÍ×µá¤Ë»È¤ï¤ì¤ë¡£
Î㤨¤Ð¡¢¤¢¤ë¥¤¥ó¥¿¡¼¥Õ¥§¡¼¥¹¤ËÆþ¤Ã¤Æ¤¯¤ë¤³¤Î¤è¤¦¤Ê¥Ñ¥±¥Ã¥È¤ò¥Ö¥í¥Ã¥¯¤¹¤ì¤Ð¡¢
Æ⦤ؤΠTCP Àܳ¤Ï¶Ø»ß¤µ¤ì¤ë¤¬¡¢³°Â¦¤Ø¤Î TCP Àܳ¤Ë¤Ï±Æ¶Á¤·¤Ê¤¤¡£
¤³¤ì¤Ï \fB--tcp-flags SYN,RST,ACK SYN\fP ¤ÈÅù¤·¤¤¡£
"--syn" ¤ÎÁ°¤Ë "!" ¥Õ¥é¥°¤òÃÖ¤¯¤È¡¢
SYN ¥Ó¥Ã¥È¤¬¥¯¥ê¥¢¤µ¤ì ACK ¤È RST ¥Ó¥Ã¥È¤¬ÀßÄꤵ¤ì¤Æ¤¤¤ë
TCP ¥Ñ¥±¥Ã¥È¤Ë¤Î¤ß¥Þ¥Ã¥Á¤¹¤ë¡£
.TP
.BR "--tcp-option " "[!] \fInumber\fP"
.\"O Match if TCP option set.
TCP ¥ª¥×¥·¥ç¥ó¤¬ÀßÄꤵ¤ì¤Æ¤¤¤ë¾ì¹ç¤Ë¥Þ¥Ã¥Á¤¹¤ë¡£
.TP
.BR "--mss " "\fIvalue\fP[:\fIvalue\fP]"
.\"O Match TCP SYN or SYN/ACK packets with the specified MSS value (or range),
.\"O which control the maximum packet size for that connection.
»ØÄꤵ¤ì¤¿ MSS ÃÍ (¤ÎÈÏ°Ï) ¤ò»ý¤Ä TCP ¤Î 
SYN ¤Þ¤¿¤Ï SYN/ACK ¥Ñ¥±¥Ã¥È¤Ë¥Þ¥Ã¥Á¤¹¤ë¡£
MSS ¤ÏÀܳ¤ËÂФ¹¤ë¥Ñ¥±¥Ã¥È¤ÎºÇÂ祵¥¤¥º¤òÀ©¸æ¤¹¤ë¡£
.SS tos
.\"O This module matches the 8 bits of Type of Service field in the IP
.\"O header (ie. including the precedence bits).
¤³¤Î¥â¥¸¥å¡¼¥ë¤Ï IP ¥Ø¥Ã¥À¡¼¤Î 8 ¥Ó¥Ã¥È¤Î (¤Ä¤Þ¤ê¾å°Ì¥Ó¥Ã¥È¤ò´Þ¤à)
Type of Service ¥Õ¥£¡¼¥ë¥É¤Ë¥Þ¥Ã¥Á¤¹¤ë¡£
.TP
.BI "--tos " "tos"
.\"O The argument is either a standard name, (use
.\"O .br
.\"O  iptables -m tos -h
.\"O .br
.\"O to see the list), or a numeric value to match.
°ú¤­¿ô¤Ï¡¢¥Þ¥Ã¥Á¤ò¹Ô¤¦É¸½àŪ¤Ê̾Á°¤Ç¤â¿ôÃͤǤâ¤è¤¤
(̾Á°¤Î¥ê¥¹¥È¤ò¸«¤ë¤Ë¤Ï
.nf
 iptables -m tos -h
.fi
¤ò»È¤¦¤³¤È)¡£
.SS ttl
.\"O This module matches the time to live field in the IP header.
¤³¤Î¥â¥¸¥å¡¼¥ë¤Ï IP ¥Ø¥Ã¥À¡¼¤Î time to live ¥Õ¥£¡¼¥ë¥É¤Ë¥Þ¥Ã¥Á¤¹¤ë¡£
.TP
.BI "--ttl " "ttl"
.\"O Matches the given TTL value.
»ØÄꤵ¤ì¤¿ TTL Ãͤ˥ޥåÁ¤¹¤ë¡£
.SS udp
.\"O These extensions are loaded if `--protocol udp' is specified.  It
.\"O provides the following options:
¤³¤ì¤é¤Î³ÈÄ¥¤Ï `--protocol udp' ¤¬»ØÄꤵ¤ì¤¿¾ì¹ç¤Ë¥í¡¼¥É¤µ¤ì¡¢
°Ê²¼¤Î¥ª¥×¥·¥ç¥ó¤¬Ä󶡤µ¤ì¤ë:
.TP
.BR "--source-port " "[!] \fIport\fP[:\fIport\fP]"
.\"O Source port or port range specification.
.\"O See the description of the
.\"O .B --source-port
.\"O option of the TCP extension for details.
Á÷¿®¸µ¥Ý¡¼¥È¤Þ¤¿¤Ï¥Ý¡¼¥ÈÈϰϤλØÄê¡£
¾ÜºÙ¤Ï TCP ³ÈÄ¥¤Î
.B --source-port
¥ª¥×¥·¥ç¥ó¤ÎÀâÌÀ¤ò»²¾È¤¹¤ë¤³¤È¡£
.TP
.BR "--destination-port " "[!] \fIport\fP[:\fIport\fP]"
.\"O Destination port or port range specification.
.\"O See the description of the
.\"O .B --destination-port
.\"O option of the TCP extension for details.
Á÷¿®Àè¥Ý¡¼¥È¤Þ¤¿¤Ï¥Ý¡¼¥ÈÈϰϤλØÄê¡£
¾ÜºÙ¤Ï TCP ³ÈÄ¥¤Î
.B --destination-port
¥ª¥×¥·¥ç¥ó¤ÎÀâÌÀ¤ò»²¾È¤¹¤ë¤³¤È¡£
.SS unclean
.\"O This module takes no options, but attempts to match packets which seem
.\"O malformed or unusual.  This is regarded as experimental.
¤³¤Î¥â¥¸¥å¡¼¥ë¤Ë¤Ï¥ª¥×¥·¥ç¥ó¤¬¤Ê¤¤¤¬¡¢
¤ª¤«¤·¤¯Àµ¾ï¤Ç¤Ê¤¤¤è¤¦¤Ë¸«¤¨¤ë¥Ñ¥±¥Ã¥È¤Ë¥Þ¥Ã¥Á¤¹¤ë¡£
¤³¤ì¤Ï¼Â¸³Åª¤Ê¤â¤Î¤È¤·¤Æ°·¤ï¤ì¤Æ¤¤¤ë¡£
.\"O .SH TARGET EXTENSIONS
.SH ¥¿¡¼¥²¥Ã¥È¤Î³ÈÄ¥
.\"O iptables can use extended target modules: the following are included
.\"O in the standard distribution.
iptables ¤Ï³ÈÄ¥¥¿¡¼¥²¥Ã¥È¥â¥¸¥å¡¼¥ë¤ò»È¤¦¤³¤È¤¬¤Ç¤­¤ë:
°Ê²¼¤Î¤â¤Î¤¬¡¢É¸½àŪ¤Ê¥Ç¥£¥¹¥È¥ê¥Ó¥å¡¼¥·¥ç¥ó¤Ë´Þ¤Þ¤ì¤Æ¤¤¤ë¡£
.SS DNAT
.\"O This target is only valid in the
.\"O .B nat
.\"O table, in the
.\"O .B PREROUTING
.\"O and
.\"O .B OUTPUT
.\"O chains, and user-defined chains which are only called from those
.\"O chains.  It specifies that the destination address of the packet
.\"O should be modified (and all future packets in this connection will
.\"O also be mangled), and rules should cease being examined.  It takes one
.\"O type of option:
¤³¤Î¥¿¡¼¥²¥Ã¥È¤Ï
.B nat
¥Æ¡¼¥Ö¥ë¤Î
.BR PREROUTING ,
.B OUTPUT
¥Á¥§¥¤¥ó¡¢¤³¤ì¤é¤Î¥Á¥§¥¤¥ó¤«¤é¸Æ¤Ó½Ð¤µ¤ì¤ë
¥æ¡¼¥¶¡¼ÄêµÁ¥Á¥§¥¤¥ó¤Î¤ß¤ÇÍ­¸ú¤Ç¤¢¤ë¡£
¤³¤Î¥¿¡¼¥²¥Ã¥È¤Ï¥Ñ¥±¥Ã¥È¤ÎÁ÷¿®À襢¥É¥ì¥¹¤ò½¤Àµ¤¹¤ë
(¤³¤ÎÀܳ¤Î°Ê¹ß¤Î¥Ñ¥±¥Ã¥È¤â½¤Àµ¤·¤Æʬ¤«¤é¤Ê¤¯ (mangle) ¤¹¤ë)¡£
¤µ¤é¤Ë¡¢¥ë¡¼¥ë¤Ë¤è¤ë¥Á¥§¥Ã¥¯¤ò»ß¤á¤µ¤»¤ë¡£
¤³¤Î¥¿¡¼¥²¥Ã¥È¤Ë¤Ï¥ª¥×¥·¥ç¥ó¤¬ 1 ¼ïÎढ¤ë:
.TP
.BR "--to-destination " "\fIipaddr\fP[-\fIipaddr\fP][:\fIport\fP-\fIport\fP]"
.\"O which can specify a single new destination IP address, an inclusive
.\"O range of IP addresses, and optionally, a port range (which is only
.\"O valid if the rule also specifies
.\"O .B "-p tcp"
.\"O or
.\"O .BR "-p udp" ).
.\"O If no port range is specified, then the destination port will never be
.\"O modified.
1 ¤Ä¤Î¿·¤·¤¤Á÷¿®Àè IP ¥¢¥É¥ì¥¹¡¢¤Þ¤¿¤Ï IP ¥¢¥É¥ì¥¹¤ÎÈϰϤ¬»ØÄê¤Ç¤­¤ë¡£
¥Ý¡¼¥È¤ÎÈϰϤò»ØÄꤹ¤ë¤³¤È¤â¤Ç¤­¤ë
(¤³¤ì¤Ï¥ë¡¼¥ë¤Ç
.B "-p tcp"
¤Þ¤¿¤Ï
.B "-p udp"
¤ò»ØÄꤷ¤Æ¤¤¤ë¾ì¹ç¤Ë¤Î¤ßÍ­¸ú)¡£
¥Ý¡¼¥È¤ÎÈϰϤ¬»ØÄꤵ¤ì¤Æ¤¤¤Ê¤¤¾ì¹ç¡¢Á÷¿®Àè¥Ý¡¼¥È¤ÏÊѹ¹¤µ¤ì¤Ê¤¤¡£
.RS
.PP
.\"O You can add several --to-destination options.  If you specify more
.\"O than one destination address, either via an address range or multiple
.\"O --to-destination options, a simple round-robin (one after another in
.\"O cycle) load balancing takes place between these adresses.
Ê£¿ô¤Î --to-destination ¥ª¥×¥·¥ç¥ó¤ò»ØÄꤹ¤ë¤³¤È¤¬¤Ç¤­¤ë¡£
¥¢¥É¥ì¥¹¤ÎÈϰϤˤè¤Ã¤Æ¡¢
¤â¤·¤¯¤ÏÊ£¿ô¤Î --to-destination ¥ª¥×¥·¥ç¥ó¤Ë¤è¤Ã¤Æ
2 ¤Ä°Ê¾å¤ÎÁ÷¿®À襢¥É¥ì¥¹¤ò»ØÄꤷ¤¿¾ì¹ç¡¢
¤½¤ì¤é¤Î¥¢¥É¥ì¥¹¤ò»È¤Ã¤¿Ã±½ã¤Ê¥é¥¦¥ó¥É¡¦¥í¥Ó¥ó
(½ç¡¹¤Ë½Û´Ä¤µ¤»¤ë) ¤¬¤ª¤³¤Ê¤ï¤ì¤ë¡£
.RE
.SS DSCP
.\"O This target allows to alter the value of the DSCP bits within the TOS
.\"O header of the IPv4 packet.  As this manipulates a packet, it can only
.\"O be used in the mangle table.
¤³¤Î¥¿¡¼¥²¥Ã¥È¤Ï¡¢IPv4 ¥Ñ¥±¥Ã¥È¤Î TOS ¥Ø¥Ã¥À¡¼¤Ë¤¢¤ë
DSCP ¥Ó¥Ã¥È¤ÎÃͤνñ¤­´¹¤¨¤ò²Äǽ¤Ë¤¹¤ë¡£
¤³¤ì¤Ï¥Ñ¥±¥Ã¥È¤òÁàºî¤¹¤ë¤Î¤Ç¡¢mangle ¥Æ¡¼¥Ö¥ë¤Ç¤Î¤ß»ÈÍѤǤ­¤ë¡£
.TP
.BI "--set-dscp " "value"
.\"O Set the DSCP field to a numerical value (can be decimal or hex)
DSCP ¥Õ¥£¡¼¥ë¥É¤Î¿ôÃͤòÀßÄꤹ¤ë (10 ¿Ê¤Þ¤¿¤Ï 16 ¿Ê)¡£
.TP
.BI "--set-dscp-class " "class"
.\"O Set the DSCP field to a DiffServ class.
DSCP ¥Õ¥£¡¼¥ë¥É¤Î DiffServ ¥¯¥é¥¹¤òÀßÄꤹ¤ë¡£
.SS ECN
.\"O This target allows to selectively work around known ECN blackholes.
.\"O It can only be used in the mangle table.
¤³¤Î¥¿¡¼¥²¥Ã¥È¤Ï ECN ¥Ö¥é¥Ã¥¯¥Û¡¼¥ëÌäÂê¤Ø¤ÎÂнè¤ò²Äǽ¤Ë¤¹¤ë¡£
mangle ¥Æ¡¼¥Ö¥ë¤Ç¤Î¤ß»ÈÍѤǤ­¤ë¡£
.TP
.BI "--ecn-tcp-remove"
.\"O Remove all ECN bits from the TCP header.  Of course, it can only be used
.\"O in conjunction with
.\"O .BR "-p tcp" .
TCP ¥Ø¥Ã¥À¡¼¤«¤éÁ´¤Æ¤Î ECN ¥Ó¥Ã¥È (ÌõÃí: ECE/CWR ¥Õ¥é¥°) ¤ò¼è¤ê½ü¤¯¡£
ÅöÁ³¡¢
.B "-p tcp"
¥ª¥×¥·¥ç¥ó¤È¤ÎÁȹç¤ï¤»¤Ç¤Î¤ß»ÈÍѤǤ­¤ë¡£
.SS LOG
.\"O Turn on kernel logging of matching packets.  When this option is set
.\"O for a rule, the Linux kernel will print some information on all
.\"O matching packets (like most IP header fields) via the kernel log
.\"O (where it can be read with
.\"O .I dmesg
.\"O or 
.\"O .IR syslogd (8)).
¥Þ¥Ã¥Á¤·¤¿¥Ñ¥±¥Ã¥È¤ò¥«¡¼¥Í¥ë¥í¥°¤Ëµ­Ï¿¤¹¤ë¡£
¤³¤Î¥ª¥×¥·¥ç¥ó¤¬¥ë¡¼¥ë¤ËÂФ·¤ÆÀßÄꤵ¤ì¤ë¤È¡¢
Linux ¥«¡¼¥Í¥ë¤Ï¥Þ¥Ã¥Á¤·¤¿¥Ñ¥±¥Ã¥È¤Ë¤Ä¤¤¤Æ¤Î
(ÂçÉôʬ¤Î IP ¥Ø¥Ã¥À¡¼¥Õ¥£¡¼¥ë¥É¤Î¤è¤¦¤Ê) ²¿¤é¤«¤Î¾ðÊó¤ò
¥«¡¼¥Í¥ë¥í¥°¤Ëɽ¼¨¤¹¤ë
(¥«¡¼¥Í¥ë¥í¥°¤Ï
.I dmesg
¤Þ¤¿¤Ï
.IR syslogd (8)
¤Ç¸«¤ë¤³¤È¤¬¤Ç¤­¤ë)¡£
.\"O This is a "non-terminating target", i.e. rule traversal continues at
.\"O the next rule.  So if you want to LOG the packets you refuse, use two
.\"O separate rules with the same matching criteria, first using target LOG
.\"O then DROP (or REJECT).
¤³¤ì¤Ï "Èó½ªÎ»¥¿¡¼¥²¥Ã¥È" ¤Ç¤¢¤ë¡£
¤¹¤Ê¤ï¤Á¡¢¥ë¡¼¥ë¤Î¸¡Æ¤¤Ï¡¢¼¡¤Î¥ë¡¼¥ë¤Ø¤È·Ñ³¤µ¤ì¤ë¡£
¤è¤Ã¤Æ¡¢µñÈݤ¹¤ë¥Ñ¥±¥Ã¥È¤ò¥í¥°µ­Ï¿¤·¤¿¤±¤ì¤Ð¡¢
Ʊ¤¸¥Þ¥Ã¥Á¥ó¥°È½ÃÇ´ð½à¤ò»ý¤Ä 2 ¤Ä¤Î¥ë¡¼¥ë¤ò»ÈÍѤ·¡¢
ºÇ½é¤Î¥ë¡¼¥ë¤Ç LOG ¥¿¡¼¥²¥Ã¥È¤ò¡¢
¼¡¤Î¥ë¡¼¥ë¤Ç DROP (¤Þ¤¿¤Ï REJECT) ¥¿¡¼¥²¥Ã¥È¤ò»ØÄꤹ¤ë¡£
.TP
.BI "--log-level " "level"
.\"O Level of logging (numeric or see \fIsyslog.conf\fP(5)).
¥í¥°µ­Ï¿¤Î¥ì¥Ù¥ë (¿ôÃͤƻØÄꤹ¤ë¤«¡¢
(ÌõÃð: ̾Á°¤Ç»ØÄꤹ¤ë¾ì¹ç¤Ï) \fIsyslog.conf\fP(5) ¤ò»²¾È¤¹¤ë¤³¤È)¡£
.TP
.BI "--log-prefix " "prefix"
.\"O Prefix log messages with the specified prefix; up to 29 letters long,
.\"O and useful for distinguishing messages in the logs.
»ØÄꤷ¤¿¥×¥ì¥Õ¥£¥Ã¥¯¥¹¤ò¥í¥°¥á¥Ã¥»¡¼¥¸¤ÎÁ°¤ËÉÕ¤±¤ë¡£
¥×¥ì¥Õ¥£¥Ã¥¯¥¹¤Ï 29 ʸ»ú¤Þ¤Ç¤ÎŤµ¤Ç¡¢
¥í¥°¤ÎÃæ¤Ç¥á¥Ã¥»¡¼¥¸¤ò¶èÊ̤¹¤ë¤Î¤ËÌòΩ¤Ä¡£
.TP
.B --log-tcp-sequence
.\"O Log TCP sequence numbers. This is a security risk if the log is
.\"O readable by users.
TCP ¥·¡¼¥±¥ó¥¹ÈÖ¹æ¤ò¥í¥°¤Ëµ­Ï¿¤¹¤ë¡£
¥í¥°¤¬¥æ¡¼¥¶¡¼¤«¤éÆɤá¤ë¾ì¹ç¡¢¥»¥­¥å¥ê¥Æ¥£¾å¤Î´í¸±¤¬¤¢¤ë¡£
.TP
.B --log-tcp-options
.\"O Log options from the TCP packet header.
TCP ¥Ñ¥±¥Ã¥È¥Ø¥Ã¥À¡¼¤Î¥ª¥×¥·¥ç¥ó¤ò¥í¥°¤Ëµ­Ï¿¤¹¤ë¡£
.TP
.B --log-ip-options
.\"O Log options from the IP packet header.
IP ¥Ñ¥±¥Ã¥È¥Ø¥Ã¥À¡¼¤Î¥ª¥×¥·¥ç¥ó¤ò¥í¥°¤Ëµ­Ï¿¤¹¤ë¡£
.SS MARK
.\"O This is used to set the netfilter mark value associated with the
.\"O packet.  It is only valid in the
.\"O .B mangle
.\"O table.  It can for example be used in conjunction with iproute2.
¥Ñ¥±¥Ã¥È¤Ë´ØÏ¢¤Å¤±¤é¤ì¤¿ netfilter ¤Î mark ÃͤòÀßÄꤹ¤ë¡£
.B mangle
¥Æ¡¼¥Ö¥ë¤Î¤ß¤ÇÍ­¸ú¤Ç¤¢¤ë¡£
Î㤨¤Ð¡¢iproute2 ¤ÈÁȤ߹ç¤ï¤»¤Æ»È¤¦¤³¤È¤¬¤Ç¤­¤ë¡£
.TP
.BI "--set-mark " "mark"
.SS MASQUERADE
.\"O This target is only valid in the
.\"O .B nat
.\"O table, in the
.\"O .B POSTROUTING
.\"O chain.
¤³¤Î¥¿¡¼¥²¥Ã¥È¤Ï
.B nat
¥Æ¡¼¥Ö¥ë¤Î
.B POSTROUTING
¥Á¥§¥¤¥ó¤Î¤ß¤ÇÍ­¸ú¤Ç¤¢¤ë¡£
.\"O It should only be used with dynamically assigned IP (dialup)
.\"O connections: if you have a static IP address, you should use the SNAT
.\"O target.
ưŪ³ä¤êÅö¤Æ IP (¥À¥¤¥ä¥ë¥¢¥Ã¥×) Àܳ¤Î¾ì¹ç¤Ë¤Î¤ß»È¤¦¤Ù¤­¤Ç¤¢¤ë¡£
¸ÇÄê IP ¥¢¥É¥ì¥¹¤Ê¤é¤Ð¡¢SNAT ¥¿¡¼¥²¥Ã¥È¤ò»È¤¦¤Ù¤­¤Ç¤¢¤ë¡£
.\"O Masquerading is equivalent to specifying a mapping to the IP
.\"O address of the interface the packet is going out, but also has the
.\"O effect that connections are
.\"O .I forgotten
.\"O when the interface goes down.
¥Þ¥¹¥«¥ì¡¼¥Ç¥£¥ó¥°¤Ï¡¢¥Ñ¥±¥Ã¥È¤¬Á÷¿®¤µ¤ì¤ë¥¤¥ó¥¿¡¼¥Õ¥§¡¼¥¹¤Î
IP ¥¢¥É¥ì¥¹¤Ø¤Î¥Þ¥Ã¥Ô¥ó¥°¤ò»ØÄꤹ¤ë¤Î¤ÈƱ¤¸¤Ç¤¢¤ë¤¬¡¢
¥¤¥ó¥¿¡¼¥Õ¥§¡¼¥¹¤¬Ää»ß¤·¤¿¾ì¹ç¤ËÀܳ¤ò\fI˺¤ì¤ë\fR¤È¤¤¤¦¸ú²Ì¤¬¤¢¤ë¡£
.\"O This is the correct behavior when the
.\"O next dialup is unlikely to have the same interface address (and hence
.\"O any established connections are lost anyway).  It takes one option:
¼¡¤Î¥À¥¤¥ä¥ë¥¢¥Ã¥×¤Ç¤ÏƱ¤¸¥¤¥ó¥¿¡¼¥Õ¥§¡¼¥¹¥¢¥É¥ì¥¹¤Ë¤Ê¤ë²ÄǽÀ­¤¬Ä㤤
(¤½¤Î¤¿¤á¡¢Á°²ó³ÎΩ¤µ¤ì¤¿Àܳ¤Ï¼º¤ï¤ì¤ë) ¾ì¹ç¡¢
¤³¤ÎÆ°ºî¤ÏÀµ¤·¤¤¡£
¤³¤Î¥¿¡¼¥²¥Ã¥È¤Ë¤Ï¥ª¥×¥·¥ç¥ó¤¬ 1 ¤Ä¤¢¤ë¡£
.TP
.BR "--to-ports " "\fIport\fP[-\fIport\fP]"
.\"O This specifies a range of source ports to use, overriding the default
.\"O .B SNAT
.\"O source port-selection heuristics (see above).  This is only valid
.\"O if the rule also specifies
.\"O .B "-p tcp"
.\"O or
.\"O .BR "-p udp" .
¤³¤Î¥ª¥×¥·¥ç¥ó¤Ï¡¢»ÈÍѤ¹¤ëÁ÷¿®¸µ¥Ý¡¼¥È¤ÎÈϰϤò»ØÄꤷ¡¢
¥Ç¥Õ¥©¥ë¥È¤Î
.B SNAT
Á÷¿®¸µ¥Ý¡¼¥È¤ÎÁªÂòÊýË¡ (¾åµ­) ¤è¤ê¤âÍ¥À褵¤ì¤ë¡£
¥ë¡¼¥ë¤¬
.B "-p tcp"
¤Þ¤¿¤Ï
.B "-p udp"
¤ò»ØÄꤷ¤Æ¤¤¤ë¾ì¹ç¤Ë¤Î¤ßÍ­¸ú¤Ç¤¢¤ë¡£
.SS MIRROR
.\"O This is an experimental demonstration target which inverts the source
.\"O and destination fields in the IP header and retransmits the packet.
¼Â¸³Åª¤Ê¥Ç¥â¥ó¥¹¥È¥ì¡¼¥·¥ç¥óÍѤΥ¿¡¼¥²¥Ã¥È¤Ç¤¢¤ê¡¢
IP ¥Ø¥Ã¥À¡¼¤ÎÁ÷¿®¸µ¤ÈÁ÷¿®Àè¥Õ¥£¡¼¥ë¥É¤òÆþ¤ì´¹¤¨¡¢
¥Ñ¥±¥Ã¥È¤òºÆÁ÷¿®¤¹¤ë¤â¤Î¤Ç¤¢¤ë¡£
.\"O It is only valid in the
.\"O .BR INPUT ,
.\"O .B FORWARD
.\"O and
.\"O .B PREROUTING
.\"O chains, and user-defined chains which are only called from those
.\"O chains.
¤³¤ì¤Ï
.BR INPUT ,
.BR FORWARD ,
.B PREROUTING
¥Á¥§¥¤¥ó¤È¡¢¤³¤ì¤é¤Î¥Á¥§¥¤¥ó¤«¤é¸Æ¤Ó½Ð¤µ¤ì¤ë
¥æ¡¼¥¶¡¼ÄêµÁ¥Á¥§¥¤¥ó¤À¤±¤ÇÍ­¸ú¤Ç¤¢¤ë¡£
.\"O Note that the outgoing packets are
.\"O .B NOT
.\"O seen by any packet filtering chains, connection tracking or NAT, to
.\"O avoid loops and other problems.
¥ë¡¼¥×Åù¤ÎÌäÂê¤ò²óÈò¤¹¤ë¤¿¤á¡¢³°Éô¤ËÁ÷¤é¤ì¤ë¥Ñ¥±¥Ã¥È¤Ï
¤¤¤«¤Ê¤ë¥Ñ¥±¥Ã¥È¥Õ¥£¥ë¥¿¥ê¥ó¥°¥Á¥§¥¤¥ó¡¦ÀܳÄÉÀס¦NAT ¤«¤é¤â
´Æ»ë\fB¤µ¤ì¤Ê¤¤\fR¡£
.SS REDIRECT
.\"O This target is only valid in the
.\"O .B nat
.\"O table, in the
.\"O .B PREROUTING
.\"O and
.\"O .B OUTPUT
.\"O chains, and user-defined chains which are only called from those
.\"O chains.  It alters the destination IP address to send the packet to
.\"O the machine itself (locally-generated packets are mapped to the
.\"O 127.0.0.1 address).  It takes one option:
¤³¤Î¥¿¡¼¥²¥Ã¥È¤Ï¡¢
.B nat
¥Æ¡¼¥Ö¥ëÆâ¤Î
.B PREROUTING 
¥Á¥§¥¤¥óµÚ¤Ó
.B OUTPUT 
¥Á¥§¥¤¥ó¡¢¤½¤·¤Æ¤³¤ì¤é¥Á¥§¥¤¥ó¤«¤é¸Æ¤Ó½Ð¤µ¤ì¤ë
¥æ¡¼¥¶¡¼ÄêµÁ¥Á¥§¥¤¥ó¤Ç¤Î¤ßÍ­¸ú¤Ç¤¢¤ë¡£
¤³¤Î¥¿¡¼¥²¥Ã¥È¤Ï¥Ñ¥±¥Ã¥È¤ÎÁ÷¿®Àè IP ¥¢¥É¥ì¥¹¤ò
¥Þ¥·¥ó¼«¿È¤Î IP ¥¢¥É¥ì¥¹¤ËÊÑ´¹¤¹¤ë¡£
(¥í¡¼¥«¥ë¤ÇÀ¸À®¤µ¤ì¤¿¥Ñ¥±¥Ã¥È¤Ï¡¢¥¢¥É¥ì¥¹ 127.0.0.1 ¤Ë¥Þ¥Ã¥×¤µ¤ì¤ë)¡£
¤³¤Î¥¿¡¼¥²¥Ã¥È¤Ë¤Ï¥ª¥×¥·¥ç¥ó¤¬ 1 ¤Ä¤¢¤ë:
.TP
.BR "--to-ports " "\fIport\fP[-\fIport\fP]"
.\"O This specifies a destination port or range of ports to use: without
.\"O this, the destination port is never altered.  This is only valid
.\"O if the rule also specifies
.\"O .B "-p tcp"
.\"O or
.\"O .BR "-p udp" .
¤³¤Î¥ª¥×¥·¥ç¥ó¤Ï»ÈÍѤµ¤ì¤ëÁ÷¿®Àè¥Ý¡¼¥È¡¦¥Ý¡¼¥ÈÈÏ°Ï¡¦Ê£¿ô¥Ý¡¼¥È¤ò»ØÄꤹ¤ë¡£
¤³¤Î¥ª¥×¥·¥ç¥ó¤¬»ØÄꤵ¤ì¤Ê¤¤¾ì¹ç¡¢Á÷¿®Àè¥Ý¡¼¥È¤ÏÊѹ¹¤µ¤ì¤Ê¤¤¡£
¥ë¡¼¥ë¤¬
.B "-p tcp"
¤Þ¤¿¤Ï
.B "-p udp"
¤ò»ØÄꤷ¤Æ¤¤¤ë¾ì¹ç¤Ë¤Î¤ßÍ­¸ú¤Ç¤¢¤ë¡£
.SS REJECT
.\"O This is used to send back an error packet in response to the matched
.\"O packet: otherwise it is equivalent to
.\"O .B DROP
.\"O so it is a terminating TARGET, ending rule traversal.
¥Þ¥Ã¥Á¤·¤¿¥Ñ¥±¥Ã¥È¤Î±þÅú¤È¤·¤Æ¥¨¥é¡¼¥Ñ¥±¥Ã¥È¤òÁ÷¿®¤¹¤ë¤¿¤á¤Ë»È¤ï¤ì¤ë¡£
¥¨¥é¡¼¥Ñ¥±¥Ã¥È¤òÁ÷¤é¤Ê¤±¤ì¤Ð¡¢
.B DROP
¤ÈƱ¤¸¤Ç¤¢¤ê¡¢TARGET ¤ò½ªÎ»¤·¡¢¥ë¡¼¥ë¤Î¸¡Æ¤¤ò½ªÎ»¤¹¤ë¡£
.\"O This target is only valid in the
.\"O .BR INPUT ,
.\"O .B FORWARD
.\"O and
.\"O .B OUTPUT
.\"O chains, and user-defined chains which are only called from those
.\"O chains.  The following option controls the nature of the error packet
.\"O returned:
¤³¤Î¥¿¡¼¥²¥Ã¥È¤Ï¡¢
.BR INPUT ,
.BR FORWARD ,
.B OUTPUT
¥Á¥§¥¤¥ó¤È¡¢¤³¤ì¤é¤Î¥Á¥§¥¤¥ó¤«¤é¸Æ¤Ð¤ì¤ë
¥æ¡¼¥¶¡¼ÄêµÁ¥Á¥§¥¤¥ó¤À¤±¤ÇÍ­¸ú¤Ç¤¢¤ë¡£
°Ê²¼¤Î¥ª¥×¥·¥ç¥ó¤Ï¡¢ÊÖ¤µ¤ì¤ë¥¨¥é¡¼¥Ñ¥±¥Ã¥È¤ÎÆÃÀ­¤òÀ©¸æ¤¹¤ë¡£
.TP
.BI "--reject-with " "type"
.\"O The type given can be
.\"O .nf
.\"O .B " icmp-net-unreachable"
.\"O .B " icmp-host-unreachable"
.\"O .B " icmp-port-unreachable"
.\"O .B " icmp-proto-unreachable"
.\"O .B " icmp-net-prohibited"
.\"O .B " icmp-host-prohibited or"
.\"O .B " icmp-admin-prohibited (*)"
.\"O .fi
.\"O which return the appropriate ICMP error message (\fBport-unreachable\fP is
.\"O the default).
type ¤È¤·¤Æ»ØÄê²Äǽ¤Ê¤â¤Î¤Ï
.nf
.B " icmp-net-unreachable"
.B " icmp-host-unreachable"
.B " icmp-port-unreachable"
.B " icmp-proto-unreachable"
.B " icmp-net-prohibited"
.B " icmp-host-prohibited or"
.B " icmp-admin-prohibited (*)"
.fi
¤Ç¤¢¤ê¡¢Å¬ÀÚ¤Ê ICMP ¥¨¥é¡¼¥á¥Ã¥»¡¼¥¸¤òÊÖ¤¹
.RB ( port-unreachable
¤¬¥Ç¥Õ¥©¥ë¥È¤Ç¤¢¤ë)¡£
.\"O The option
.\"O .B tcp-reset
.\"O can be used on rules which only match the TCP protocol: this causes a
.\"O TCP RST packet to be sent back.  This is mainly useful for blocking 
.\"O .I ident
.\"O (113/tcp) probes which frequently occur when sending mail to broken mail
.\"O hosts (which won't accept your mail otherwise).
TCP ¥×¥í¥È¥³¥ë¤Ë¤Î¤ß¥Þ¥Ã¥Á¤¹¤ë¥ë¡¼¥ë¤ËÂФ·¤Æ¡¢¥ª¥×¥·¥ç¥ó
.B tcp-reset
¤ò»È¤¦¤³¤È¤¬¤Ç¤­¤ë¡£
¤³¤Î¥ª¥×¥·¥ç¥ó¤ò»È¤¦¤È¡¢TCP RST ¥Ñ¥±¥Ã¥È¤¬Á÷¤êÊÖ¤µ¤ì¤ë¡£
¼ç¤È¤·¤Æ
.I ident
(113/tcp) ¤Ë¤è¤ëõºº¤òÁ˻ߤ¹¤ë¤Î¤ËÌòΩ¤Ä¡£
.I ident
¤Ë¤è¤ëõºº¤Ï¡¢²õ¤ì¤Æ¤¤¤ë (¥á¡¼¥ë¤ò¼õ¤±¼è¤é¤Ê¤¤) ¥á¡¼¥ë¥Û¥¹¥È¤Ë
¥á¡¼¥ë¤¬Á÷¤é¤ì¤ë¾ì¹ç¤ËÉÑÈˤ˵¯¤³¤ë¡£
.\"O .TP
.\"O (*) Using icmp-admin-prohibited with kernels that do not support it will result in a plain DROP instead of REJECT
.RS
.PP
(*) icmp-admin-prohibited ¤ò¥µ¥Ý¡¼¥È¤·¤Ê¤¤¥«¡¼¥Í¥ë¤Ç¡¢
icmp-admin-prohibited ¤ò»ÈÍѤ¹¤ë¤È¡¢
REJECT ¤Ç¤Ï¤Ê¤¯Ã±¤Ê¤ë DROP ¤Ë¤Ê¤ë¡£
.SS SNAT
.\"O This target is only valid in the
.\"O .B nat
.\"O table, in the
.\"O .B POSTROUTING
.\"O chain.  It specifies that the source address of the packet should be
.\"O modified (and all future packets in this connection will also be
.\"O mangled), and rules should cease being examined.  It takes one type
.\"O of option:
¤³¤Î¥¿¡¼¥²¥Ã¥È¤Ï
.B nat
¥Æ¡¼¥Ö¥ë¤Î
.B POSTROUTING
¥Á¥§¥¤¥ó¤Î¤ß¤ÇÍ­¸ú¤Ç¤¢¤ë¡£
¤³¤Î¥¿¡¼¥²¥Ã¥È¤Ï¥Ñ¥±¥Ã¥È¤ÎÁ÷¿®¸µ¥¢¥É¥ì¥¹¤ò½¤Àµ¤µ¤»¤ë
(¤³¤ÎÀܳ¤Î°Ê¹ß¤Î¥Ñ¥±¥Ã¥È¤â½¤Àµ¤·¤Æʬ¤«¤é¤Ê¤¯ (mangle) ¤¹¤ë)¡£
¤µ¤é¤Ë¡¢¥ë¡¼¥ë¤¬É¾²Á¤òÃæ»ß¤¹¤ë¤è¤¦¤Ë»Ø¼¨¤¹¤ë¡£
¤³¤Î¥¿¡¼¥²¥Ã¥È¤Ë¤Ï¥ª¥×¥·¥ç¥ó¤¬ 1 ¼ïÎढ¤ë:
.TP
.BR "--to-source  " "\fIipaddr\fP[-\fIipaddr\fP][:\fIport\fP-\fIport\fP]"
.\"O which can specify a single new source IP address, an inclusive range
.\"O of IP addresses, and optionally, a port range (which is only valid if
.\"O the rule also specifies
.\"O .B "-p tcp"
.\"O or
.\"O .BR "-p udp" ).
1 ¤Ä¤Î¿·¤·¤¤Á÷¿®¸µ IP ¥¢¥É¥ì¥¹¡¢¤Þ¤¿¤Ï IP ¥¢¥É¥ì¥¹¤ÎÈϰϤ¬»ØÄê¤Ç¤­¤ë¡£
¥Ý¡¼¥È¤ÎÈϰϤò»ØÄꤹ¤ë¤³¤È¤â¤Ç¤­¤ë
(¥ë¡¼¥ë¤¬
.B "-p tcp"
¤Þ¤¿¤Ï
.B "-p udp"
¤ò»ØÄꤷ¤Æ¤¤¤ë¾ì¹ç¤Ë¤Î¤ßÍ­¸ú)¡£
.\"O If no port range is specified, then source ports below 512 will be
.\"O mapped to other ports below 512: those between 512 and 1023 inclusive
.\"O will be mapped to ports below 1024, and other ports will be mapped to
.\"O 1024 or above. Where possible, no port alteration will occur.
¥Ý¡¼¥È¤ÎÈϰϤ¬»ØÄꤵ¤ì¤Æ¤¤¤Ê¤¤¾ì¹ç¡¢
512 ̤Ëþ¤ÎÁ÷¿®¸µ¥Ý¡¼¥È¤Ï¡¢Â¾¤Î 512 ̤Ëþ¤Î¥Ý¡¼¥È¤Ë¥Þ¥Ã¥Ô¥ó¥°¤µ¤ì¤ë¡£
512 ¡Á 1023 ¤Þ¤Ç¤Î¥Ý¡¼¥È¤Ï¡¢1024 ̤Ëþ¤Î¥Ý¡¼¥È¤Ë¥Þ¥Ã¥Ô¥ó¥°¤µ¤ì¤ë¡£
¤½¤ì°Ê³°¤Î¥Ý¡¼¥È¤Ï¡¢1024 °Ê¾å¤Î¥Ý¡¼¥È¤Ë¥Þ¥Ã¥Ô¥ó¥°¤µ¤ì¤ë¡£
²Äǽ¤Ç¤¢¤ì¤Ð¡¢¥Ý¡¼¥È¤ÎÊÑ´¹¤Ïµ¯¤³¤é¤Ê¤¤¡£
.RS
.PP
.\"O You can add several --to-source options.  If you specify more
.\"O than one source address, either via an address range or multiple
.\"O --to-source options, a simple round-robin (one after another in
.\"O cycle) takes place between these adresses.
Ê£¿ô¤Î --to-source ¥ª¥×¥·¥ç¥ó¤ò»ØÄꤹ¤ë¤³¤È¤¬¤Ç¤­¤ë¡£
¥¢¥É¥ì¥¹¤ÎÈϰϤˤè¤Ã¤Æ¡¢
¤â¤·¤¯¤ÏÊ£¿ô¤Î --to-source ¥ª¥×¥·¥ç¥ó¤Ë¤è¤Ã¤Æ
2 ¤Ä°Ê¾å¤ÎÁ÷¿®¸µ¥¢¥É¥ì¥¹¤ò»ØÄꤷ¤¿¾ì¹ç¡¢
¤½¤ì¤é¤Î¥¢¥É¥ì¥¹¤ò»È¤Ã¤¿Ã±½ã¤Ê¥é¥¦¥ó¥É¡¦¥í¥Ó¥ó
(½ç¡¹¤Ë½Û´Ä¤µ¤»¤ë) ¤¬¤ª¤³¤Ê¤ï¤ì¤ë¡£
.SS TCPMSS
.\"O This target allows to alter the MSS value of TCP SYN packets, to control
.\"O the maximum size for that connection (usually limiting it to your
.\"O outgoing interface's MTU minus 40).  Of course, it can only be used
.\"O in conjunction with
.\"O .BR "-p tcp" .
¤³¤Î¥¿¡¼¥²¥Ã¥È¤òÍѤ¤¤ë¤È¡¢TCP ¤Î SYN ¥Ñ¥±¥Ã¥È¤Î MSS Ãͤò½ñ¤­´¹¤¨¡¢
¤½¤Î¥³¥Í¥¯¥·¥ç¥ó¤ÎºÇÂ祵¥¤¥º
(Ä̾ï¤Ï¡¢Á÷¿®¥¤¥ó¥¿¡¼¥Õ¥§¡¼¥¹¤Î MTU ¤«¤é 40 °ú¤¤¤¿ÃÍ)
¤òÀ©¸æ¤Ç¤­¤ë¡£
¤â¤Á¤í¤ó
.B "-p tcp"
¤ÈÁȤ߹ç¤ï¤»¤Æ¤·¤«»È¤¨¤Ê¤¤¡£
.\"O .br
.PP
.\"O This target is used to overcome criminally braindead ISPs or servers
.\"O which block ICMP Fragmentation Needed packets.  The symptoms of this
.\"O problem are that everything works fine from your Linux
.\"O firewall/router, but machines behind it can never exchange large
.\"O packets:
¤³¤Î¥¿¡¼¥²¥Ã¥È¤ÏÈȺáŪ¤ËƬ¤Î¤¤¤«¤ì¤¿ ISP ¤ä
ICMP Fragmentation Needed ¥Ñ¥±¥Ã¥È¤ò¥Ö¥í¥Ã¥¯¤·¤Æ¤·¤Þ¤¦¥µ¡¼¥Ð¡¼¤ò
¾è¤ê±Û¤¨¤ë¤¿¤á¤Ë»ÈÍѤ¹¤ë¡£
Linux ¥Õ¥¡¥¤¥¢¥¦¥©¡¼¥ë/¥ë¡¼¥¿¡¼¤Ç¤Ï²¿¤âÌäÂ꤬¤Ê¤¤¤Î¤Ë¡¢
¤½¤³¤Ë¤Ö¤é²¼¤¬¤ë¥Þ¥·¥ó¤Ç¤Ï°Ê²¼¤Î¤è¤¦¤ËÂ礭¤Ê¥Ñ¥±¥Ã¥È¤ò
¤ä¤ê¤È¤ê¤Ç¤­¤Ê¤¤¤È¤¤¤¦¤Î¤¬¡¢¤³¤ÎÌäÂê¤ÎÃû¸õ¤Ç¤¢¤ë¡£
.PD 0
.RS 0.1i
.TP 0.3i
1)
.\"O Web browsers connect, then hang with no data received.
¥¦¥§¥Ö¡¦¥Ö¥é¥¦¥¶¤ÇÀܳ¤¬¡¢²¿¤Î¥Ç¡¼¥¿¤â¼õ¤±¼è¤é¤º¤Ë¥Ï¥ó¥°¤¹¤ë
.TP
2)
.\"O Small mail works fine, but large emails hang.
û¤¤¥á¡¼¥ë¤ÏÌäÂê¤Ê¤¤¤¬¡¢Ä¹¤¤¥á¡¼¥ë¤¬¥Ï¥ó¥°¤¹¤ë
.TP
3)
.\"O ssh works fine, but scp hangs after initial handshaking.
ssh ¤ÏÌäÂê¤Ê¤¤¤¬¡¢scp ¤ÏºÇ½é¤Î¥Ï¥ó¥É¥·¥§¡¼¥¯¸å¤Ë¥Ï¥ó¥°¤¹¤ë
.RE
.PD
.\"O Workaround: activate this option and add a rule to your firewall
.\"O configuration like:
²óÈòÊýË¡: ¤³¤Î¥ª¥×¥·¥ç¥ó¤òÍ­¸ú¤Ë¤·¡¢°Ê²¼¤Î¤è¤¦¤Ê¥ë¡¼¥ë¤ò
¥Õ¥¡¥¤¥¢¥¦¥©¡¼¥ë¤ÎÀßÄê¤ËÄɲ乤롣
.nf
 iptables -A FORWARD -p tcp --tcp-flags SYN,RST SYN \\
             -j TCPMSS --clamp-mss-to-pmtu
.fi
.TP
.BI "--set-mss " "value"
.\"O Explicitly set MSS option to specified value.
MSS ¥ª¥×¥·¥ç¥ó¤ÎÃͤò»ØÄꤷ¤¿ÃͤËÀßÄꤹ¤ë¡£
.TP
.B "--clamp-mss-to-pmtu"
.\"O Automatically clamp MSS value to (path_MTU - 40).
¼«Æ°Åª¤Ë¡¢MSS Ãͤò (path_MTU - 40) ¤Ë¶¯À©¤¹¤ë¡£
.\"O .TP
.RS
.PP
.\"O These options are mutually exclusive.
¤³¤ì¤é¤Î¥ª¥×¥·¥ç¥ó¤Ï¤É¤Á¤é¤« 1 ¤Ä¤·¤«»ØÄê¤Ç¤­¤Ê¤¤¡£
.RE
.SS TOS
.\"O This is used to set the 8-bit Type of Service field in the IP header.
.\"O It is only valid in the
.\"O .B mangle
.\"O table.
IP ¥Ø¥Ã¥À¡¼¤Î 8 ¥Ó¥Ã¥È¤Î Type of Service ¥Õ¥£¡¼¥ë¥É¤òÀßÄꤹ¤ë¤¿¤á¤Ë»È¤ï¤ì¤ë¡£
.B mangle
¥Æ¡¼¥Ö¥ë¤Î¤ß¤ÇÍ­¸ú¤Ç¤¢¤ë¡£
.TP
.BI "--set-tos " "tos"
.\"O You can use a numeric TOS values, or use
.\"O .nf
.\"O  iptables -j TOS -h
.\"O .fi
.\"O to see the list of valid TOS names.
TOS ¤òÈÖ¹æ¤Ç»ØÄꤹ¤ë¤³¤È¤¬¤Ç¤­¤ë¡£
¤Þ¤¿¡¢
.nf
 iptables -j TOS -h
.fi
¤ò¼Â¹Ô¤·¤ÆÆÀ¤é¤ì¤ë¡¢»ÈÍѲÄǽ¤Ê TOS ̾¤Î°ìÍ÷¤Ë¤¢¤ë TOS ̾¤â»ØÄê¤Ç¤­¤ë¡£
.SS ULOG
.\"O This target provides userspace logging of matching packets.  When this
.\"O target is set for a rule, the Linux kernel will multicast this packet
.\"O through a
.\"O .IR netlink 
.\"O socket. One or more userspace processes may then subscribe to various 
.\"O multicast groups and receive the packets.
¤³¤Î¥¿¡¼¥²¥Ã¥È¤Ï¡¢¥Þ¥Ã¥Á¤·¤¿¥Ñ¥±¥Ã¥È¤ò
¥æ¡¼¥¶¡¼¶õ´Ö¤Ç¥í¥°µ­Ï¿¤¹¤ëµ¡Ç½¤òÄ󶡤¹¤ë¡£
¤³¤Î¥¿¡¼¥²¥Ã¥È¤¬¥ë¡¼¥ë¤ËÀßÄꤵ¤ì¤ë¤È¡¢
Linux ¥«¡¼¥Í¥ë¤Ï¡¢¤½¤Î¥Ñ¥±¥Ã¥È¤ò
.I netlink
¥½¥±¥Ã¥È¤òÍѤ¤¤Æ¥Þ¥ë¥Á¥­¥ã¥¹¥È¤¹¤ë¡£
¤½¤·¤Æ¡¢1 ¤Ä°Ê¾å¤Î¥æ¡¼¥¶¡¼¶õ´Ö¥×¥í¥»¥¹¤¬
¤¤¤í¤¤¤í¤Ê¥Þ¥ë¥Á¥­¥ã¥¹¥È¥°¥ë¡¼¥×¤ËÅÐÏ¿¤ò¤ª¤³¤Ê¤¤¡¢
¥Ñ¥±¥Ã¥È¤ò¼õ¿®¤¹¤ë¡£
.\"O Like LOG, this is a "non-terminating target", i.e. rule traversal
.\"O continues at the next rule.
LOG ¤ÈƱÍÍ¡¢¤³¤ì¤Ï "Èó½ªÎ»¥¿¡¼¥²¥Ã¥È" ¤Ç¤¢¤ê¡¢
¥ë¡¼¥ë¤Î¸¡Æ¤¤Ï¼¡¤Î¥ë¡¼¥ë¤Ø¤È·Ñ³¤µ¤ì¤ë¡£
.TP
.BI "--ulog-nlgroup " "nlgroup"
.\"O This specifies the netlink group (1-32) to which the packet is sent.
.\"O Default value is 1.
¥Ñ¥±¥Ã¥È¤òÁ÷¿®¤¹¤ë netlink ¥°¥ë¡¼¥× (1-32) ¤ò»ØÄꤹ¤ë¡£
¥Ç¥Õ¥©¥ë¥È¤ÎÃÍ¤Ï 1 ¤Ç¤¢¤ë¡£
.TP
.BI "--ulog-prefix " "prefix"
.\"O Prefix log messages with the specified prefix; up to 32 characters
.\"O long, and useful for distinguishing messages in the logs.
»ØÄꤷ¤¿¥×¥ì¥Õ¥£¥Ã¥¯¥¹¤ò¥í¥°¥á¥Ã¥»¡¼¥¸¤ÎÁ°¤ËÉÕ¤±¤ë¡£
32 ʸ»ú¤Þ¤Ç¤Î»ØÄê¤Ç¤­¤ë¡£
¥í¥°¤ÎÃæ¤Ç¥á¥Ã¥»¡¼¥¸¤ò¶èÊ̤¹¤ë¤Î¤ËÊØÍø¤Ç¤¢¤ë¡£
.TP
.BI "--ulog-cprange " "size"
.\"O Number of bytes to be copied to userspace.  A value of 0 always copies
.\"O the entire packet, regardless of its size.  Default is 0.
¥æ¡¼¥¶¡¼¶õ´Ö¤Ë¥³¥Ô¡¼¤¹¤ë¥Ñ¥±¥Ã¥È¤Î¥Ð¥¤¥È¿ô¡£
Ãͤ¬ 0 ¤Î¾ì¹ç¡¢¥µ¥¤¥º¤Ë´Ø·¸¤Ê¤¯Á´¥Ñ¥±¥Ã¥È¤ò¥³¥Ô¡¼¤¹¤ë¡£
¥Ç¥Õ¥©¥ë¥È¤Ï 0 ¤Ç¤¢¤ë¡£
.TP
.BI "--ulog-qthreshold " "size"
.\"O Number of packet to queue inside kernel.  Setting this value to, e.g. 10
.\"O accumulates ten packets inside the kernel and transmits them as one
.\"O netlink multipart message to userspace.  Default is 1 (for backwards
.\"O compatibility).
.\"O .br
¥«¡¼¥Í¥ëÆâÉô¤Î¥­¥å¡¼¤ËÆþ¤ì¤é¤ì¤ë¥Ñ¥±¥Ã¥È¤Î¿ô¡£
Î㤨¤Ð¡¢¤³¤ÎÃͤò 10 ¤Ë¤·¤¿¾ì¹ç¡¢
¥«¡¼¥Í¥ëÆâÉô¤Ç 10 ¸Ä¤Î¥Ñ¥±¥Ã¥È¤ò¤Þ¤È¤á¡¢
1 ¤Ä¤Î netlink ¥Þ¥ë¥Á¥Ñ¡¼¥È¥á¥Ã¥»¡¼¥¸¤È¤·¤Æ¥æ¡¼¥¶¡¼¶õ´Ö¤ËÁ÷¤ë¡£
(²áµî¤Î¤â¤Î¤È¤Î¸ß´¹À­¤Î¤¿¤á) ¥Ç¥Õ¥©¥ë¥È¤Ï 1 ¤Ç¤¢¤ë¡£
.\"O .SH DIAGNOSTICS
.SH ÊÖ¤êÃÍ
.\"O Various error messages are printed to standard error.  The exit code
.\"O is 0 for correct functioning.  Errors which appear to be caused by
.\"O invalid or abused command line parameters cause an exit code of 2, and
.\"O other errors cause an exit code of 1.
¤¤¤í¤¤¤í¤Ê¥¨¥é¡¼¥á¥Ã¥»¡¼¥¸¤¬É¸½à¥¨¥é¡¼¤Ëɽ¼¨¤µ¤ì¤ë¡£
Àµ¤·¤¯µ¡Ç½¤·¤¿¾ì¹ç¡¢½ªÎ»¥³¡¼¥É¤Ï 0 ¤Ç¤¢¤ë¡£
ÉÔÀµ¤Ê¥³¥Þ¥ó¥É¥é¥¤¥ó¥Ñ¥é¥á¡¼¥¿¤Ë¤è¤ê¥¨¥é¡¼¤¬È¯À¸¤·¤¿¾ì¹ç¤Ï¡¢
½ªÎ»¥³¡¼¥É 2 ¤¬ÊÖ¤µ¤ì¤ë¡£
¤½¤Î¾¤Î¥¨¥é¡¼¤Î¾ì¹ç¤Ï¡¢½ªÎ»¥³¡¼¥É 1 ¤¬ÊÖ¤µ¤ì¤ë¡£
.\"O .SH BUGS
.SH ¥Ð¥°
.\"O Bugs?  What's this? ;-)
.\"O Well... the counters are not reliable on sparc64.
¥Ð¥°? ¥Ð¥°¤Ã¤Æ²¿? ;-)
¤¨¡¼¤È¡Ä¡¢sparc64 ¤Ç¤Ï¥«¥¦¥ó¥¿¡¼Ãͤ¬¿®Íê¤Ç¤­¤Ê¤¤¡£
.\"O .SH COMPATIBILITY WITH IPCHAINS
.SH IPCHAINS ¤È¤Î¸ß´¹À­
.\"O This
.\"O .B iptables
.\"O is very similar to ipchains by Rusty Russell.  The main difference is
.\"O that the chains
.\"O .B INPUT
.\"O and
.\"O .B OUTPUT
.\"O are only traversed for packets coming into the local host and
.\"O originating from the local host respectively.  Hence every packet only
.\"O passes through one of the three chains (except loopback traffic, which
.\"O involves both INPUT and OUTPUT chains); previously a forwarded packet
.\"O would pass through all three.
.B iptables
¤Ï¡¢Rusty Russell ¤Î ipchains ¤ÈÈó¾ï¤Ë¤è¤¯»÷¤Æ¤¤¤ë¡£
Â礭¤Ê°ã¤¤¤Ï¡¢¥Á¥§¥¤¥ó
.B INPUT
¤È
.B OUTPUT
¤¬¡¢¤½¤ì¤¾¤ì¥í¡¼¥«¥ë¥Û¥¹¥È¤ËÆþ¤Ã¤Æ¤¯¤ë¥Ñ¥±¥Ã¥È¤È¡¢
¥í¡¼¥«¥ë¥Û¥¹¥È¤«¤é½Ð¤µ¤ì¤ë¥Ñ¥±¥Ã¥È¤Î¤ß¤·¤«Ä´¤Ù¤Ê¤¤¤È¤¤¤¦ÅÀ¤Ç¤¢¤ë¡£
¤è¤Ã¤Æ¡¢(INPUT ¤È OUTPUT ¤ÎξÊý¤Î¥Á¥§¥¤¥ó¤òµ¯Æ°¤¹¤ë
¥ë¡¼¥×¥Ð¥Ã¥¯¥È¥é¥Õ¥£¥Ã¥¯¤ò½ü¤¯)
Á´¤Æ¤Î¥Ñ¥±¥Ã¥È¤Ï 3 ¤Ä¤¢¤ë¥Á¥§¥¤¥ó¤Î¤¦¤Á 1 ¤·¤«Ä̤é¤Ê¤¤¡£
°ÊÁ°¤Ï (ipchains ¤Ç¤Ï)¡¢
¥Õ¥©¥ï¡¼¥É¤µ¤ì¤ë¥Ñ¥±¥Ã¥È¤Ï 3 ¤Ä¤Î¥Á¥§¥¤¥óÁ´¤Æ¤òÄ̤äƤ¤¤¿¡£
.PP
.\"O The other main difference is that
.\"O .B -i
.\"O refers to the input interface;
.\"O .B -o
.\"O refers to the output interface, and both are available for packets
.\"O entering the
.\"O .B FORWARD
.\"O chain.
¤½¤Î¾¤ÎÂ礭¤Ê°ã¤¤¤Ï¡¢
.B -i
¤ÇÆþÎÏ¥¤¥ó¥¿¡¼¥Õ¥§¡¼¥¹¡¢
.B -o
¤Ç½ÐÎÏ¥¤¥ó¥¿¡¼¥Õ¥§¡¼¥¹¤ò»²¾È¤¹¤ë¤³¤È¡¢
¤½¤·¤Æ¤È¤â¤Ë
.B FORWARD
¥Á¥§¥¤¥ó¤ËÆþ¤ë¥Ñ¥±¥Ã¥È¤ËÂФ·¤Æ»ØÄê²Äǽ¤ÊÅÀ¤Ç¤¢¤ë¡£
.\"O .PP The various forms of NAT have been separated out; 
.\"O .B iptables 
.\"O is a pure packet filter when using the default `filter' table, with
.\"O optional extension modules.  This should simplify much of the previous
.\"O confusion over the combination of IP masquerading and packet filtering
.\"O seen previously.  So the following options are handled differently:
.\"O .nf
.\"O  -j MASQ
.\"O  -M -S
.\"O  -M -L
.\"O .fi
.PP
NAT ¤Î¤¤¤í¤¤¤í¤Ê·Á¼°¤¬Ê¬³ä¤µ¤ì¤¿¡£
¥ª¥×¥·¥ç¥ó¤Î³ÈÄ¥¥â¥¸¥å¡¼¥ë¤È¤È¤â¤Ë
¥Ç¥Õ¥©¥ë¥È¤Î¡Ö¥Õ¥£¥ë¥¿¡×¥Æ¡¼¥Ö¥ë¤òÍѤ¤¤¿¾ì¹ç¡¢
.B iptables 
¤Ï½ã¿è¤Ê¥Ñ¥±¥Ã¥È¥Õ¥£¥ë¥¿¤È¤Ê¤ë¡£
¤³¤ì¤Ï¡¢°ÊÁ°¤ß¤é¤ì¤¿ IP ¥Þ¥¹¥«¥ì¡¼¥Ç¥£¥ó¥°¤È¥Ñ¥±¥Ã¥È¥Õ¥£¥ë¥¿¥ê¥ó¥°¤Î
Áȹ礻¤Ë¤è¤ëº®Íð¤ò´Êά²½¤¹¤ë¡£
¤è¤Ã¤Æ¡¢¥ª¥×¥·¥ç¥ó
.nf
 -j MASQ
 -M -S
 -M -L
.fi
¤ÏÊ̤Τâ¤Î¤È¤·¤Æ°·¤ï¤ì¤ë¡£
.\"O There are several other changes in iptables.
iptables ¤Ç¤Ï¡¢¤½¤Î¾¤Ë¤â¤¤¤¯¤Ä¤«¤ÎÊѹ¹¤¬¤¢¤ë¡£
.\"O .SH SEE ALSO
.SH ´ØÏ¢¹àÌÜ
.BR iptables-save (8),
.BR iptables-restore (8),
.BR ip6tables (8),
.BR ip6tables-save (8),
.BR ip6tables-restore (8).
.P
.\"O The packet-filtering-HOWTO details iptables usage for
.\"O packet filtering, the NAT-HOWTO details NAT,
.\"O the netfilter-extensions-HOWTO details the extensions that are
.\"O not in the standard distribution,
.\"O and the netfilter-hacking-HOWTO details the netfilter internals.
¥Ñ¥±¥Ã¥È¥Õ¥£¥ë¥¿¥ê¥ó¥°¤Ë¤Ä¤¤¤Æ¤Î¾ÜºÙ¤Ê iptables ¤Î»ÈÍÑË¡¤ò
ÀâÌÀ¤·¤Æ¤¤¤ë packet-filtering-HOWTO¡£
NAT ¤Ë¤Ä¤¤¤Æ¾ÜºÙ¤ËÀâÌÀ¤·¤Æ¤¤¤ë NAT-HOWTO¡£
ɸ½àŪ¤ÊÇÛÉۤˤϴޤޤì¤Ê¤¤³ÈÄ¥¤Î¾ÜºÙ¤ò
ÀâÌÀ¤·¤Æ¤¤¤ë netfilter-extensions-HOWTO¡£
ÆâÉô¹½Â¤¤Ë¤Ä¤¤¤Æ¾ÜºÙ¤ËÀâÌÀ¤·¤Æ¤¤¤ë netfilter-hacking-HOWTO¡£
.\"O .br
.PP
.\"O See
.\"O .BR "http://www.netfilter.org/" .
.UR http://www.netfilter.org/
.B http://www.netfilter.org/
.UE
¤ò»²¾È¤Î¤³¤È¡£
.\"O .SH AUTHORS
.SH Ãø¼Ô
.\"O Rusty Russell wrote iptables, in early consultation with Michael
.\"O Neuling.
Rusty Russell ¤Ï¡¢½é´ü¤ÎÃʳ¬¤Ç Michael Neuling ¤ËÁêÃ̤·¤Æ iptables ¤ò½ñ¤¤¤¿¡£
.PP
.\"O Marc Boucher made Rusty abandon ipnatctl by lobbying for a generic packet
.\"O selection framework in iptables, then wrote the mangle table, the owner match,
.\"O the mark stuff, and ran around doing cool stuff everywhere.
Marc Boucher ¤Ï Rusty ¤Ë iptables ¤Î°ìÈÌŪ¤Ê¥Ñ¥±¥Ã¥ÈÁªÂò¤Î¹Í¤¨Êý¤ò´«¤á¤Æ¡¢
ipnatctl ¤ò»ß¤á¤µ¤»¤¿¡£
¤½¤·¤Æ¡¢mangle ¥Æ¡¼¥Ö¥ë¡¦½êÍ­¼Ô¥Þ¥Ã¥Á¥ó¥°¡¦
mark µ¡Ç½¤ò½ñ¤­¡¢¤¤¤¿¤ë¤È¤³¤í¤Ç»È¤ï¤ì¤Æ¤¤¤ëÁÇÀ²¤é¤·¤¤¥³¡¼¥É¤ò½ñ¤¤¤¿¡£
.PP
.\"O James Morris wrote the TOS target, and tos match.
James Morris ¤¬ TOS ¥¿¡¼¥²¥Ã¥È¤È tos ¥Þ¥Ã¥Á¥ó¥°¤ò½ñ¤¤¤¿¡£
.PP
.\"O Jozsef Kadlecsik wrote the REJECT target.
Jozsef Kadlecsik ¤¬ REJECT ¥¿¡¼¥²¥Ã¥È¤ò½ñ¤¤¤¿¡£
.PP
.\"O Harald Welte wrote the ULOG target, TTL, DSCP, ECN matches and targets.
Harald Welte ¤¬ ULOG ¥¿¡¼¥²¥Ã¥È¤È¡¢
TTL, DSCP, ECN ¤Î¥Þ¥Ã¥Á¡¦¥¿¡¼¥²¥Ã¥È¤ò½ñ¤¤¤¿¡£
.PP
.\"O The Netfilter Core Team is: Marc Boucher, Martin Josefsson, Jozsef Kadlecsik, 
.\"O James Morris, Harald Welte and Rusty Russell.
Netfilter ¥³¥¢¥Á¡¼¥à¤Ï¡¢Marc Boucher, Martin Josefsson, Jozsef Kadlecsik, 
James Morris, Harald Welte, Rusty Russell ¤Ç¤¢¤ë¡£
.PP
.\"O Man page written by Herve Eychenne <rv@wallfire.org>.
man ¥Ú¡¼¥¸¤Ï Herve Eychenne <rv@wallfire.org> ¤¬½ñ¤¤¤¿¡£
.\" .. and did I mention that we are incredibly cool people?
.\" .. sexy, too ..
.\" .. witty, charming, powerful ..
.\" .. and most of all, modest ..
.\" .. ¤½¤·¤Æ¡¢ËÍÅù¤¬¤È¤Æ¤â¥¯¡¼¥ë¤ÊÅÛ¤é¤À¤È¸À¤Ã¤Æ¤ª¤¤¤Æ¤â¤¤¤¤¤«¤Ê¡©
.\" .. ¥»¥¯¥·¡¼¤Ç ..
.\" .. ¤È¤Æ¤â¥¦¥£¥Ã¥È¤ËÉÙ¤ó¤Ç¤¤¤Æ¡¢¥Á¥ã¡¼¥ß¥ó¥°¤Ç¡¢¥Ñ¥ï¥Õ¥ë¤Ç ..
.\" .. ¤½¤·¤Æ¡¢¤ß¤ó¤Ê¸¬µõ¤Ê¤ó¤À ..