Firewall rules for local lan

[JJB]

Here is a rewrite of the FreeBSD handbook firewall section with
examples that will answer all your questions.

www.a1poweruser.com/FBSD_firewall/



-----Original Message-----
From: owner-freebsd-questions at freebsd.org
[mailto:owner-freebsd-questions at freebsd.org]On Behalf Of Gaspar
Kiraly
Sent: Sunday, July 11, 2004 8:52 AM
To: freebsd-questions at freebsd.org
Subject: Firewall rules for local lan

Hello,

I have a quick question for you:

I am in the process of setting up ipfw for my server and a small LAN
of two pcs.
The FreeBSD server is used as an internet gateway with a dial up
connection (ppp -auto -alias demand).
My network connection is working fine, however I am getting more and
more junk mail lately.
It looks like some sites are sniffing out my e-mail address, my pc
configs, etc.
Hence, I'd like to setup a firewall.
I found many good examples, however they deal with a one pc
(FreeBSD) one network card setup.
For ex: do I need to add "divert" and "bridge" to the Kernel config
file? How do I set up different rules for for each nic?
I'd like to be able to access the FreeBSD server from my local LAN
w/o any restrictions but I do not want the internet sites to do the
same with my server and LAN. Would you have an example setup for
this scenario? The FreeBSD server is also setup to provide address
resolution for the internet.

I'd appreciate any help.

Gaspar
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