>On Sun, Dec 12, 1999 at 11:01:31PM +0800, Chan Yiu Wah wrote:
>> I am going to config the ipf filter for my i386 system.  however, I am
not familiar with it.

At 12:22 PM 12/12/99 -0400, David Maxwell wrote:
>man ipf.conf - that will give you a very complete explanation of the ipf
>syntax. It's a bit overwhelming when you first look at it.
>
>The important bits:
>
>set 'ipfilter=YES' in /etc/rc.conf to make sure ipf is enabled for next
>time you boot. Run 'ipf -E' to enable it now without rebooting.

Beyond that, read the how-to at

    http://www.obfuscation.org/ipf/

It also has a pointer to the IP Filter homepage