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Date:      Tue, 01 May 2001 00:46:54 -0600
From:      Wes Peters <wes@softweyr.com>
To:        Matt Dillon <dillon@earth.backplane.com>
Cc:        =?iso-8859-1?Q?Jes=FAs=20Arn=E1iz?= <jesus@pasapues.com>, questions@FreeBSD.ORG, hackers@FreeBSD.ORG
Subject:   Re: NAT and IPFiltering
Message-ID:  <3AEE5BDE.ACB3F3A5@softweyr.com>
References:  <EPEJLCLAKFDENCGMPJJDAECPDFAA.jesus@pasapues.com> <200104262321.f3QNLpx61257@earth.backplane.com>

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Matt Dillon wrote:
> 
> :Hi!
> :
> :I'm configuring a server able to do NAT and IP FILTERING (IPF).
> :
> :What are the required options that I should set to the kernel?
> :
> :I have this:
> :...
> :Jesús Arnáiz
> 
>     I think all you need is:
> 
>         options         IPFIREWALL
>         options         IPDIVERT

Those are for ipfw/natd.  For ipfilter, you need:

>     I usually also have (because it is useful):
> 
>         options         IPFILTER

If you want to use ipmon to log ipf actions, you'll need:

	options		IPFILTER_LOG

The default state in ipf is open, you can change it to block with:

	options		IPFILTER_DEFAULT_BLOCK

That's it.  ipnat uses ipfilter in the kernel and requires only the 
IPFILTER option.

-- 
            "Where am I, and what am I doing in this handbasket?"

Wes Peters                                                         Softweyr LLC
wes@softweyr.com                                           http://softweyr.com/

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