On 24 December 2012 18:09, Robin Wood <[email protected]> wrote: > On 23 December 2012 23:50, Robin Wood <[email protected]> wrote: >> Hi >> I need an IP tables rule that will catch all traffic going over a >> network bridge and send anything destined to port 80 to 8080. As the >> proxy that will be listening on port 8080 will modify some traffic to >> make it request from the IP of the local machine I'll need the rule to >> ignore requests to port 80 on the IP of the localhost. >> >> This is what I tried as this works with IP forwarding for things like >> ARP spoofing but this doesn't work in this instance, I think because >> there is no routing going on, the traffic is just being passed >> straight through. >> >> iptables -t nat -A PREROUTING -p tcp --destination-port 80 ! -d >> <local-IP> -j REDIRECT --to-port 8080 >> >> With this rule in place, if I drop the -d I can get pages being >> requested from the web server on the local machine to be bounced >> through the proxy. >> >> How do I do it? >> >> Got a few good tools going to be based on this if I can get it to work > > A few people have suggested things but none have worked so far. To > work out which chain will affect things I've just tried the following: > > iptables -A INPUT -p tcp --dport 80 -j DROP > iptables -A OUTPUT -p tcp --dport 80 -j DROP > iptables -A FORWARD -p tcp --dport 80 -j DROP > > Which I think should drop all traffic heading towards port 80 but even > with those rules in place I'm still able to surf through the bridge. > > From a previous project I have a feeling that having iptables affect > bridge traffic is hard. If the device was routing traffic then the > above rules should work but as it is just bridging then it isn't > working. > > Robin
I've remembered what I should be doing, I need ebtables not iptables. ebtables.sourceforge.net/br_fw_ia/br_fw_ia.html That should get me in the middle. Robin _______________________________________________ Pauldotcom mailing list [email protected] http://mail.pauldotcom.com/cgi-bin/mailman/listinfo/pauldotcom Main Web Site: http://pauldotcom.com
