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Cheesepie · Apprentice Joined: 19 Jan 2004 Posts: 154

BradN · Posted: Fri Sep 30, 2005 5:42 pm Post subject:

Make sure the interfaces allow changing the mac address, ie:
ifconfig eth0 down
ifconfig eth0 hw ether 55:55:55:55:55:55
ifconfig eth0 up

If the card doesn't allow changing the mac address, you can't use bridging.

Can a client ping both of the interfaces (ie, 10.1.2.1 and 10.1.3.1)?

What is the bridging/network related dmesg output?

I ran bridging over 2 interfaces on my router for a while, and it worked fine with no extra screwing around required, so I don't know what the problem could be if the cards allow sending any mac address. My wireless card has that problem, and if I remember, it worked in one direction only.

bschrock · n00b Joined: 24 Sep 2005 Posts: 23 Location: Dublin, OH

Can you post the firewall rules you are using? Maybe you have something funky in prerouting or postrouting. Also have you tried to use tcpdump to see where the packets are going. Try to use tcpdump on the bridge and see if the traffic looks like it is supposed to. Then use tcpdump on the eth2 and eth3 interfaces to see if the request is ok, but the reply is hosed etc. etc. etc.

Cheesepie · Apprentice Joined: 19 Jan 2004 Posts: 154

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