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Old 09-22-2004, 06:57 AM   #1
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Registered: Aug 2004
Location: London
Distribution: Redhat AS 3
Posts: 8

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Question Firewall Bridge

In newb Forum but not expecting many replies in there

Hello everyone,

A question That that I am sure there is a quick and easy answer too

I have created a Bridge between two network without any problems. The bridge is Transparent and both networks talk to each other with no problems. As I followed the mini Howto for bridgin I assigned a ip to both eth0 and eth1 with an IP add to br0.

Now I want to use iptables to filter traffic that is going through my bridge br0. As the NIC's have no ip address' I can't really use IP tables as there is no IP ... However I have grow fond of Guarddog and really don't want to make ebtable rules and wish to carry on using ip tables.

First quetion.

1. Is there a GUI for ebtables. I have tried googling and can't seem to find one.

2. The br-nf patch. How does this work and does it work. I have looked at source forge and can't seem to get an anser in a "Lame" format. Does it update the ipfilter moduels in ther kernel? Does it change the way iptables work?

I think thats enough questions for now

Thanks for you time

Old 09-23-2004, 05:50 PM   #2
Registered: Feb 2004
Location: USA
Distribution: Debian
Posts: 174

Rep: Reputation: 16
1. I haven't ever seen a GUI. Honestly, there's probably not much demand for one...

2. Pretty much the br-nf patch gets applied to the Linux kernel and enables IP packets passing through the bridge to be seen by iptables - normally the bridge code acts at a lower level than iptables so you need this if you want to do filtering with iptables (as opposed to ebtables which should work without this patch - iptables has more features).


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