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Date:      Thu, 13 Dec 2001 17:06:54 +0100 (CET)
From:      =?iso-8859-1?q?Fabrizio=20Ravazzini?= <freefabri@yahoo.it>
To:        freebsd-isp@freebsd.org
Subject:   Ipf & Bridging ???
Message-ID:  <20011213160654.81416.qmail@web20108.mail.yahoo.com>

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Hello all I've done a bridge between Internet and my
DMZ:
		Internet
		   |
                   |
              Cisco Router
		   |
                   |
		   |rl0
		FreeBSD 4.3
		Bridge
		   |rl1
 		   |
		  HUB----DMZ

The bridge works very well,for example from the DMZ
the servers in it can "see" Internet and from internet
I can "see" the servers in the DMZ(Public Ip's).
The problem is with ipf.
If for example we put a simple rule in /etc/ipf.rules
like this:
block in quick on rl0

in order to block all the traffic going to the DMZ it
happens that packets originated from internet they
by-pass my bridge/firewall!
If you ping for example the bridge they are blocked
but if you ping a machine in the dmz it responds!
arghhh..
I tried to put the rules for the bridge founded in the
Ipfilter based firewalls howto but they didn't work.
Any Idea?
Isn't ipfilter supported under freebsd?
Have I to use ipfw?
Many thanks all
bye
		   

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