IPFW(4)

NAME
ipfw - IP packet filter and traffic accounting

DESCRIPTION
Ipfw is a system facility which allows filtering, redirecting, and other operations on IP packets travelling through system interfaces.

The user interface for ipfw is implemented by the ipfw(8) program.

KERNEL OPTIONS
The following options in the kernel configuration file are related to ipfw operation: Options in the kernel configuration file:

options IPFIREWALL
    enable ipfw

options IPFIREWALL_VERBOSE
    enable firewall logging

options IPFIREWALL_VERBOSE_LIMIT
    limit firewall logging

options IPDIVERT
    enable divert(4) sockets

SEE ALSO
setsockopt(2), divert(4), ip(4), ipfw(8), sysctl(8), syslogd(8)