enc man page on MirBSD

enc man page on MirBSD

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ENC(4)			   BSD Programmer's Manual			ENC(4)

NAME
     enc - Encapsulating Interface

SYNOPSIS
     pseudo-device enc [count]

DESCRIPTION
     The enc interface is a software loopback mechanism that allows hosts or
     firewalls to filter ipsec(4) traffic using pf(4). The vpn(8) manpage
     shows an example of such a setup.

     The enc interface is a software loopback mechanism that allows an ad-
     ministrator to see outgoing packets before they have been processed by
     ipsec(4), or incoming packets after they have been similarly processed,
     via tcpdump(8).

     The "enc0" interface inherits all IPsec traffic. Thus all IPsec traffic
     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 ipsec(4),
     or all incoming packets after they have been similarly processed:

     #> ifconfig enc0 up
     #> tcpdump -i enc0

SEE ALSO
     bpf(4), inet(4), ipsec(4), netintro(4), pf(4), tcpdump(8), vpn(8)

MirOS BSD #10-current	       October 7, 1999				     1

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