> I use RedHat 7.3, iptables, and bridging as a firewall for my > DSL connection at home. I have premium ADSL, with five IP's, > provided by a single DSL modem with a 10mbs ethernet port on > it. The upstream router (gateway) is outside of my control. > I've been set up and working for roughly six months. Sunday > night, around 9 PM my DSL stopped working. After hours on > the phone, my provider decided that it was my setup and not > their equipment. Here are the details: > > If you plug the DSL modem directly into one Windows PC it > works. If you plug the DSL modem into the bridge it doesn't > work. Pinging the gateway from br0's IP returns 'destination > unreachable'. The lights blink on the modem, but the > external interface reports zero Rx bytes. I've even tried > 'down'ing the other interface, removing the bridge and > assigning the IP directly to the outside interface. Still no > dice. If you plug the DSL modem into the uplink port on my > hub it doesn't work. This did work before I got wise and > switched to the bridge. Everything gets a link light, none of > the cables were changed, etc. > > Could this have anything to do with vlan? Tracerouting my > gateway IP shows that they use vlan to provide my static > IP's. The DSL tech (not my ISP by the way) eluded to my > modem having an IP of its own that was not part of my scope. > > Could the ISP be somehow blocking the use of a hub or bridge? > I can't see how, but it might explain what's going on.
It sounds to me like it could be a MAC issue, I know that some ISP's require the ethernet device that connects to the modem to be stored by the modem and forwarded, sometimes this can be solved by power cycling the modem when it is connected to the new ethernet device, this time connected to the bridge. I recall needing to do something similar to this. I'd also check the ifconfig of the bridge and also of the ethernet device prior to upping the bridge and see if the MAC address of the ethernet device that the DSL modem is connecting to is the same as the one used by the bridge. Hope that helps for now, a couple of other ideas, but too pushed for time just now. Cheers, Lewis Shobbrook FastTrack Pty. Ltd. Phone: +61 3 9866 8700 Fax: +61 3 9820 0276 _______________________________________________ Bridge mailing list [EMAIL PROTECTED] http://www.math.leidenuniv.nl/mailman/listinfo/bridge
