[an error occurred while processing this directive] FreeBSD Handbook : Users, groups and security : Firewalls : Enabling IPFW on FreeBSD
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6.4.3. Enabling IPFW on FreeBSD

As the main part of the IPFW system lives in the kernel, you will need to add one or more options to your kernel configuration file, depending on what facilities you want, and recompile your kernel. See reconfiguring the kernel for more details on how to recompile your kernel.

There are currently three kernel configuration options relevant to IPFW:

options IPFIREWALL

Compiles into the kernel the code for packet filtering.

options IPFIREWALL_VERBOSE

Enables code to allow logging of packets through syslogd(8). Without this option, even if you specify that packets should be logged in the filter rules, nothing will happen.

options IPACCT

Turns on the IP accounting facilities.

FreeBSD Handbook : Users, groups and security : Firewalls : Enabling IPFW on FreeBSD
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