FreeBSD Manual Pages
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 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 ipsec(4), or incoming packets after they have been similarly processed, via tcpdump(1). 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(1) 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: tcpdump -i enc0 SEE ALSO tcpdump(1), bpf(4), ipf(4), ipfw(4), ipsec(4), pf(4), tcpdump(8) FreeBSD 11.1 August 1, 2007 FreeBSD 11.1
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+7.0-RELEASE>