Thanks Melissa for responding
I was trying to play with physdev.
Ignoring all the inbound stuff, if I was on the console of this machine
(Mybox)
MyBox
+-----br0----+
| |
router<--->eth0+ +eth1<--->Lan
Where br0, eth0 and eth1 had no ip address, and I wanted to "yum update"
(which I presume uses port 80) what rules would I need to put in place
? I was looking for something to do with 127.0.0.1 (the lo interface)
and eth0.
If I got that to work, the squid proxy should automatically follow, no ?
Julian
Melissa Meyer wrote:
>
> In the 2.6 kernel, there's an iptables module called physdev to match
> the bridge's physical in and out devices so something like:
>
> iptables -A FORWARD -m physdev -p tcp --dport 25
> --physdev-in eth0 -j ACCEPT
>
> to allow smtp traffic through.
>
>
> Julian Lyndon-Smith wrote:
>> I want to be able to install a box that is a transparent bridge, but
>> that is also running a transparent proxy, but with a twist ..
>>
>> i am a newbie in all things linux, so bear with me :)
>>
>> So far I have managed to install centos 4.3, and following various
>> guides on the net, created a bridge between eth1 (connected to lan) and
>> eth0 (connected to router). That works great.
>>
>> I also managed to install squid, get it running transparently and added
>> a rule to iptables to make all that work just fine. So now, all my
>> clients attached to the lan run through the squid proxy without them
>> knowing.
>>
>> Now, for the twist. For development and testing, I assigned an ip
>> address and gateway to the bridge. I need to be able for a "non-it"
>> person to install this box without having to set it up at all , so it
>> cannot have an ip address assigned, as it *may* be in use somewhere else
>> on the lan or router.
>>
>> So, I changed the ip address to 0.0.0.0. Everything except squid still
>> worked. I presume that's because it does not know how to route the data
>> to get stuff.
>>
>> Can I add a rule to iptables or something to say "anything that's come
>> from eth1 into the local box, after processing send to eth0" and
>> vice-versa ?
>>
>> Julian.
>> _______________________________________________
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>>
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>
>
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