WRT54G & AM200 Modem

Discussion in 'Cisco/Linksys Wireless Routers' started by AndyH, Mar 17, 2007.

  1. AndyH

    AndyH LI Guru Member

    Hi all,

    Now I know this has been covered before but I'm trying to set these two devices up in a specific way!

    I've recently purchased the AM200 to take advantage of its ADSL2+ capability. With my previous setup, the modem was in half bridge mode which simply authenticated with my ISP and then the router handled everything else. I can't seem to get this to work with the AM200. The latest firmware for the AM200 is v1.19.00 which has a box for half bridge mode but I can't get it to work. Can someone explain how to just have the modem working as such and have the router handle everything else. My previous modem worked perfectly this way and it looks like this new firmware should also allow this.

    Have attached a few screen shots.

    Please can someone advise...

    Attached Files:

  2. AndyH

    AndyH LI Guru Member

    So has anyone downloaded this latest firmware from Linksys and tried using half bridge mode? I still have problems and believe using half bridge mode would be the easiest answer.

    Can anyone help please.
  3. AndyH

    AndyH LI Guru Member

    O.K. I've followed the guide on setting up the AM200 with the WRT54G and all works well... however I can't get the port forwarding to work!

    I have the WRT set up for DDNS. However I can't access anything from outside the LAN. It appears the AM200 is still not letting traffic through to the WRT for forwarding.

    Please, please can anyone shed any light on this. It's driving me to distraction and I'm sure someone out there has the solution.....
  4. tarquel

    tarquel Network Guru Member

    I'm looking to get a AM200 shortly for a client...

    Is the firewall on both the AM200 & the WRT54G switched on maybe?

    And just on a seperate note, I don't suppose you can tell me whether the AM200 works ok with vista?

  5. AndyH

    AndyH LI Guru Member


    Thanks for the reply. The firewalls on both are turned off so it's not that causing the problem. I've tried every combination but can't seem to get access from the WAN side.

    I'm not sure whether the AM200 will work with Vista - perhaps an email to Linksys would confirm this?
  6. mstombs

    mstombs Network Guru Member

  7. AndyH

    AndyH LI Guru Member

    Thanks for the reply. My modem is the AM200 but believe the two are very similar. I have v1.19.00 already on the modem. This gave it the half bridge option but haven't been able to get it to work.

    I'll have a read through the thread you linked to and see if I can spot the problem.
  8. cactusfazer

    cactusfazer Network Guru Member

    Why don't you put the AM200 in "Bridged mode only" and WRT have parameter to connect the AM200 to internet?
  9. AndyH

    AndyH LI Guru Member

    Tried that but the WRT only allows PPPoE connection and it just wouldn't connect. I believe a lot of exchanges and ISPs only accept PPPoA. I thought this would have been the easiest way to do it but have tried it several times with no success in connecting via the WRT.
  10. cactusfazer

    cactusfazer Network Guru Member

    My ISP accept PPPoE! I will try this week-end your config between my WRT54GL DD-WRT and the AM200, and i tell you if i have the same problem.
  11. AndyH

    AndyH LI Guru Member

    Excellent, thanks! Will be interested to hear how you get on.
  12. cactusfazer

    cactusfazer Network Guru Member

    Witch connection type you use from the WRT?
  13. AndyH

    AndyH LI Guru Member

    At present I have it configured as Static IP but when trying bridged mode from the modem, I had it set as PPPoE.

    The problem with access outside my LAN appears to be fixed though but don't ask me why! I had reset everything last night and then followed the advice here: http://jelnet.free.fr/forum/viewtopic.php?p=1357

    I left it over night and when checking everything this morning I can now access the NAS drive etc from the WAN side. I checked this using dialup and also got a friend to try it. I've no idea what I did wrong the first time but it seems to be working fine using the method described above.

    I'd still be interested in finding out how you get on with bridged mode though.
  14. cactusfazer

    cactusfazer Network Guru Member

    I have put the AM200 in PPPoE and the WRT too. Can you try to put your AM200 in PPPoA and the WRT in PPPoE? The AM200 is half bridge.
  15. AndyH

    AndyH LI Guru Member

    I did try that but couldn't get a connection to the net. Seems my ISP doesn't like PPPoE.

    I'll dig around and see if I can find out whether my ISP specifically supports PPPoE.
  16. cactusfazer

    cactusfazer Network Guru Member

    even if the AM200 is in PPPoA ? I think (but i'm not sure) that it's the AM that choose the connection type. The WRT, in PPPoE, ask to AM to use PPPoE but the AM is in PPPoA so, it have to use PPPoA even if the WRT want PPPoE. Connect first the AM and after the WRT.
  17. mstombs

    mstombs Network Guru Member

    NB the modem cannot convert PPPoE to PPPoA, despite a number of such claims on the net. In the UK ISPs that route via BT may publish instructions use PPPoA only but BT do allow PPPoE connections. In Bridge mode the modem does not interfere with the PPP connection -the endpoint is in the WRT and if that tries to use PPPoE then that's how it talks to the ISP.
  18. yellowplum

    yellowplum LI Guru Member

    I recently also purchased an AM200 also to run it in half bridge mode with an linux firewall the only problem was that when I tried it it would work up to a point but not pass back any IP addressess from the ISP to the DMZ.

    According to Linksys Support....

    Angela (46237E): I am afraid Alex, I have just researched on this issue, but it looks like, AM200 will only be able to support 1 IP address at any point of time.

    So back to the drawring board and looking for another modem.
  19. dolly_oops

    dolly_oops Network Guru Member

    When I tried to get the AM200 working in this way, I found that I couldn't get it working properly with my Smoothwall box, yet it seemed to work with my WRT54G (running Tomato)...
  20. mstombs

    mstombs Network Guru Member

    If you have multiple IP addresses the best solution is to give one to the modem and run it in no-nat mode. Not sure what DMZ has to do with it, or if it is possible to configure the AM200 in no-nat mode - bit other modem/routers definitely can!
  21. SideshowBob

    SideshowBob Network Guru Member


    Can some of you let me now if you are able to log on the AM200?
    My WRT54GL is at and my AM200 at and i's not possible for me to log in to the AM200.
    Does someone can?

    All information is welcome!
  22. mstombs

    mstombs Network Guru Member

    It would be a lot easier if you change one of these to the 192.168.2.x range for example!

    Re your sig

    I guess the "ADSL2MUE 4.17Ti" is actually a really old "2.17Ti"?, are you still using this, probably has V3 dsp drivers? The half-bridge script in Routertech 2.5 was developed on my ADSL2MUE, and the dsp drivers include much recent v7.3
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