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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
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