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ENC(4)                 FreeBSD Kernel Interfaces Manual                 ENC(4)

NAME
     enc -- Encapsulating Interface

SYNOPSIS
     To compile this driver into the kernel, place the following line in your
     kernel configuration file:

           device enc

DESCRIPTION
     The enc interface is a software loopback mechanism that allows hosts or
     firewalls to filter fast_ipsec(4) traffic using any firewall package that
     hooks in via the pfil(9) framework.

     The enc interface allows an administrator to see outgoing packets before
     they have been processed by fast_ipsec(4), or incoming packets after they
     have been similarly processed, via tcpdump(8).

     The ``enc0'' interface inherits all IPsec traffic.  Thus all IPsec traf-
     fic can be filtered based on ``enc0'', and all IPsec traffic could be
     seen by invoking tcpdump(8) on the ``enc0'' interface.

EXAMPLES
     To see all outgoing packets before they have been processed via
     fast_ipsec(4), or all incoming packets after they have been similarly
     processed:

           # tcpdump -i enc0

SEE ALSO
     tcpdump(1), bpf(4), fast_ipsec(4), ipf(4), ipfw(4), pf(4)

FreeBSD 6.2                      June 16, 2006                     FreeBSD 6.2

NAME | SYNOPSIS | DESCRIPTION | EXAMPLES | SEE ALSO

Want to link to this manual page? Use this URL:
<https://www.freebsd.org/cgi/man.cgi?query=enc&sektion=4&manpath=FreeBSD+6.2-RELEASE>

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