msgid "The type given can be 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> (*), which return the appropriate ICMP error message (B<icmp-port-unreachable> is the default). The option B<tcp-reset> can be used on rules which only match the TCP protocol: this causes a TCP RST packet to be sent back. This is mainly useful for blocking I<ident> (113/tcp) probes which frequently occur when sending mail to broken mail hosts (which won't accept your mail otherwise)."
msgid "The type given can be 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> (*), which return the appropriate ICMP error message (B<icmp-port-unreachable> is the default). The option B<tcp-reset> can be used on rules which only match the TCP protocol: this causes a TCP RST packet to be sent back. This is mainly useful for blocking I<ident> (113/tcp) probes which frequently occur when sending mail to broken mail hosts (which won't accept your mail otherwise)."