FreeBSD has Two Firewalls?

Lowell Gilbert freebsd-questions-local at
Wed Feb 11 05:43:27 PST 2004

"Loren M. Lang" <lorenl at> writes:

> I'm trying to learn how to configure my firewall on FreeBSD and there
> seems to be quite a few commands related to it.  It looks like, though,
> that FreeBSD has two different implentations of firewalls.  One uses
> ipfw to configure it and has natd for nat, the other uses ipf and has
> ipmon, ipnat, ipfs for controlling it.  Is this true?

Pretty much.

There are some more firewall implementations in the ports, as well.

> Where are some good references for learning the packet filter on
> FreeBSD?

The FreeBSD Handbook and the manual are usually plenty.

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