From owner-freebsd-net Tue Feb 25 17: 8:12 2003 Delivered-To: freebsd-net@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 1053D37B401 for ; Tue, 25 Feb 2003 17:08:11 -0800 (PST) Received: from sccrmhc03.attbi.com (sccrmhc03.attbi.com [204.127.202.63]) by mx1.FreeBSD.org (Postfix) with ESMTP id 60C9243F3F for ; Tue, 25 Feb 2003 17:08:10 -0800 (PST) (envelope-from julian@elischer.org) Received: from interjet.elischer.org (12-232-168-4.client.attbi.com[12.232.168.4]) by sccrmhc03.attbi.com (sccrmhc03) with ESMTP id <20030226010809003007gc3he>; Wed, 26 Feb 2003 01:08:09 +0000 Received: from localhost (localhost.elischer.org [127.0.0.1]) by InterJet.elischer.org (8.9.1a/8.9.1) with ESMTP id RAA90752; Tue, 25 Feb 2003 17:08:07 -0800 (PST) Date: Tue, 25 Feb 2003 17:08:06 -0800 (PST) From: Julian Elischer To: Darcy Buskermolen Cc: freebsd-net@freebsd.org Subject: Re: Transparent Proxy In-Reply-To: <200302201559.16002.darcy@wavefire.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-net@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org Are packets from the proxy going through 192.168.0.254? you may have to have a rule to let them out without being fwd'd again. On Tue, 25 Feb 2003, Darcy Buskermolen wrote: > > (Promoted to -net due to lack of responces on -questions) > > > I'm trying to deploy a transparent proxy server for a friend's office but have > run into a couple of snags that I can't seam to find the correct answer for. > Please see http://home2.dbitech.bc.ca:8080/netconfig.txt for graphical > topology > > Note that I'm running IPFW2 on both BSD boxes. > > ipfw list output on 192.168.0.254: > > 00001 skipto 50000 tcp from any 1023-65535 to me dst-port 22 > 00040 skipto 50 tcp from 192.168.0.1 to any dst-port 80 > 00048 fwd 192.168.0.1 tcp from 192.168.0.0/24 to any dst-port 80 out > 00999 divert 8669 ip from any to any via ed0 > 65533 allow ip from any to any > 65535 deny ip from any to any > > ipfw list output on 192.168.0.1: > > 00500 fwd 127.0.0.1,3128 ip from 192.168.0.0/16 to any dst-port 80 in > 65000 allow ip from any to any > 65535 deny ip from any to any > > When the windows box (192.168.0.32) makes a web request it gets forwarded to > the squid machine fine, and squid returns a "access denied" error message, > checking the cache.log on squid I see the reason is as follows: > > 2003/02/20 04:19:47| WARNING: Forwarding loop detected for: > GET / HTTP/1.0 > > All the information I can find online regaring setting up transparent proxying > for squid using ipfw shows squid running on the gateway host, or on a > diffrent network segment. Can anybody point me in the correct direction to > tell me what it is that I'm missing? > > -- > Darcy Buskermolen > Wavefire Technologies Corp. > ph: 250.717.0200 > fx: 250.763.1759 > http://www.wavefire.com > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-net" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message