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22 ipsec_tncfg \- lists IPSEC virtual interfaces attached to real interfaces
24 .HP \w'\fBipsec\fR\ 'u
25 \fBipsec\fR \fItncfg\fR
27 \fIcat/proc/net/ipsec_tncfg\fR
30 Note that tncfg is only supported on the classic KLIPS stack\&. It is not supported on any other stack and will be completely removed in future versions\&. A replacement command still needs to be designed
34 is a read\-only file which lists which IPSEC virtual interfaces are attached to which real interfaces, through which packets will be forwarded once processed by IPSEC\&.
36 Each line lists one ipsec I/F\&. A table entry consists of:
40 an ipsec virtual I/F name
45 a visual and machine parsable separator \'\->\', separating the virtual I/F and the physical I/F,
50 a physical I/F name, to which the ipsec virtual I/F is attached or NULL if it is not attached,
61 the MTU of the ipsec virtual I/F,
66 the automatically adjusted effective MTU for PMTU discovery, in brackets,
71 a visual and machine parsable separator \'\->\', separating the virtual I/F MTU and the physical I/F MTU,
76 the MTU of the attached physical I/F\&.
80 \fBipsec2 \-> eth3 mtu=16260(1443) \-> 1500\fR
84 shows that virtual device
88 is connected to physical device
92 and that the effective MTU as a result of PMTU discovery has been automatically set to
95 \fBipsec0 \-> wvlan0 mtu=1400(16260) \-> 1500\fR
99 shows that virtual device
103 is connected to physical device
107 and no PMTU packets have gotten far enough to bump down the effective MTU from its default of 16260\&.
109 \fBipsec3 \-> NULL mtu=0(0) \-> 0\fR
113 shows that virtual device
115 is not connected to any physical device\&.
118 /proc/net/ipsec_tncfg, /usr/local/bin/ipsec
121 ipsec(8), ipsec_manual(8), ipsec_eroute(5), ipsec_spi(5), ipsec_spigrp(5), ipsec_klipsdebug(5), ipsec_tncfg(8), ipsec_version(5), ipsec_pf_key(5)
124 Written for the Linux FreeS/WAN project <\m[blue]\fBhttp://www\&.freeswan\&.org/\fR\m[]> by Richard Guy Briggs\&.