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       ipsec_tncfg - manipulate KLIPS virtual interfaces


       ipsec tncfg
             ipsec tncfg --create virtual
             ipsec tncfg --delete virtual
             ipsec tncfg --attach --virtual virtual --physical physical
             ipsec tncfg --detach --virtual virtual
             ipsec tncfg --clear
             ipsec tncfg --version
             ipsec tncfg --help


       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


       The historical use of tncfg is to attach/detach IPsec virtual
       interfaces (e.g. ipsec0) to/from physical interfaces (e.g. eth0)
       through which packets will be forwarded once processed by KLIPS.

       The modern use of tncfg is to create and delete virtual interfaces
       known as mastXXX. mast stands for Mooring and XXX.

       The form with no additional arguments lists the contents of
       /proc/net/ipsec_tncfg. The format of /proc/net/ipsec_tncfg is discussed
       in ipsec_tncfg(5).

       The --attach form attaches the virtual interface to the physical one.

       The --detach form detaches the virtual interface from whichever
       physical interface it is attached to.

       The --clear form clears all the virtual interfaces from whichever
       physical interfaces they were attached to.

       Virtual interfaces typically have names like ipsec0 or mast0 while
       physical interfaces typically have names like eth0 or ppp0.


       ipsec tncfg --create mast12
           creates the mast12 device.

       ipsec tncfg --create ipsec4
           creates an ipsec4 device, but does not attach it.

       ipsec tncfg --attach --virtual ipsec0 --physical eth0
           attaches the ipsec0 virtual device to the eth0 physical device.


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


       ipsec(8), ipsec_manual(8), ipsec_eroute(8), ipsec_spi(8),
       ipsec_spigrp(8), ipsec_klipsdebug(8), ipsec_tncfg(5)


       Written for the Linux FreeS/WAN project <> by
       Richard Guy Briggs.

[FIXME: source]                   02/25/2010