Provided by: openswan_2.4.4-3ubuntu1_i386 bug

NAME

       ipsec_tncfg   -   lists  IPSEC  virtual  interfaces  attached  to  real
       interfaces

SYNOPSIS

       ipsec tncfg

       cat /proc/net/ipsec_tncfg

DESCRIPTION

       /proc/net/ipsec_tncfg 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.

       Each line lists one ipsec I/F.  A table entry consists of:

       +  an ipsec virtual I/F name

       +  a visual and machine parsable separator ’->’, separating the virtual
          I/F and the physical I/F,

       +  a  physical  I/F name, to which the ipsec virtual I/F is attached or
          NULL if it is not attached,

       +  the keyword mtu=,

       +  the MTU of the ipsec virtual I/F,

       +  the automatically adjusted effective  MTU  for  PMTU  discovery,  in
          brackets,

       +  a visual and machine parsable separator ’->’, separating the virtual
          I/F MTU and the physical I/F MTU,

       +  the MTU of the attached physical I/F.

EXAMPLES

       ipsec2 -> eth3 mtu=16260(1443) -> 1500

       shows that virtual device ipsec2 with an MTU of 16260 is  connected  to
       physical  device eth3 with an MTU of 1500 and that the effective MTU as
       a result of PMTU discovery has been automatically set to 1443.

       ipsec0 -> wvlan0 mtu=1400(16260) -> 1500

       shows that virtual device ipsec0 with an MTU of 1400  is  connected  to
       physical  device  wvlan0  with  an MTU of 1500 and no PMTU packets have
       gotten far enough to bump down the effective MTU from  its  default  of
       16260.

       ipsec3 -> NULL mtu=0(0) -> 0

       shows  that  virtual  device  ipsec3  is  not connected to any physical
       device.

FILES

       /proc/net/ipsec_tncfg, /usr/bin/ipsec

SEE ALSO

       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)

HISTORY

       Written for the Linux FreeS/WAN project  <http://www.freeswan.org/>  by
       Richard Guy Briggs.

                                  27 Jun 2000                   IPSEC_TNCFG(5)