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slAoD
June 26th, 2008, 01:04 PM
Hello i have the following setup.

http://i28.tinypic.com/28rxue.jpg

The routers are linksys wrt54g(s) with dd-wrt on them and the PCs have Ubuntu and WinXP as their operating system.

The DSL modem A is a siemens speedstream 4200 and is working in a bridged mode. It is connected to C's Wan port and C is working as a PPPoE and shares the internet connection.

The problem is that although every router and pc can ping each other, and the dsl connection is properly shared with B and D , E and F cannot see the internet.

The good thing is that E and F can resolve internet addresses through C but they cannot even ping at the internet.

I did a little research over the internet and found that my case is almost identical to that : http://www.dd-wrt.com/wiki/index.php/Wireless_Bridge (http://www.dd-wrt.com/wiki/index.php/Wireless_Bridge) , but the only difference is that the router D which corresponds to the dsl modem is in access point mode. Is this change going to make a difference??

What seems to be the solution to my problem here?

thank you in advance.

kevdog
June 26th, 2008, 02:15 PM
What's the connection between D and E -- wireless? Don't you want D in repeater bridge mode rather than client bridged mode (assuming its wireless)? E is fine in access point mode. Have you set the gateway addresses properly?

slAoD
June 26th, 2008, 04:33 PM
thank you for your reply.
The connection between E and D is indeed a wireless connection.
I have set the default gateway of all routers of the network to be 10.176.7.33(C).

Actually your idea about repeater bridged client is interesting but why do i need a repeater?

kevdog
June 26th, 2008, 07:11 PM
Isn't D just supposed to rebroadcast the signal? I can't see your picture now for some reason so I have lost your network design (and it was a good picture).

kevdog
June 26th, 2008, 08:52 PM
Whats the purpose of the D router? By your drawing it just seems like its acting as a wireless hub of sorts. E and C can not communicate directly?

Also it seems at a minimun E should be in client bridge mode or repeater bridge mode -- the difference between the two is that with bridge mode, only wired clients can use the network (similar to your drawing) -- with repeater bridge -- wired and wireless clients may be clients connecting through E.
http://www.dd-wrt.com/wiki/index.php/Wireless_Bridge

If you are insistent with using D for whatever reason, it seems D would need to be configured in Access Point Mode with dhcp turned off. In fact in all cases you want router C to be your only dhcp server on the lan. All of your gateways should also list the IP address of C as the gateway also.

slAoD
June 27th, 2008, 08:55 PM
OK i changed D into a AP and E into a wireless bridge and now everything works like a charm(apart from some winXP clients in B that their route table grow unnecessarily large but i will find out a solution for that ).

Thank you for your valuable advice!!