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Services behind ADSL2MUE

Discussion in 'Other Linksys Equipment' started by Doc, Feb 4, 2005.

  1. Doc

    Doc Network Guru Member

    Hello everyone!

    I bought my mate an ADSL2MUE modem because his old Zoom one got knackered.

    He's got his posh little server, running a Windows Media stream, POP3, SMTP and FTP server and a few other bits and bobs.

    He's been having trouble setting up any of the services because it seems the ADSL2MUE won't do any sort of port forwarding.

    Is there any way around this?

  2. Biker

    Biker Network Guru Member

    Don't think so.

    Unless... you get an ADSL router/modem combo.

  3. s0undt3ch

    s0undt3ch Guest

    I also have an ADSL2MUE, just bought it!

    Now, this thread is making me a bit worried!
    All I wanted was an Ethernet Modem, not a combo 2in1, not even a modem and a router!!!

    I'm running linux, that is going to do all my firewalling and routing, now does this mean that even so, I wont be able to setup an http server, pop server, or even access my system trough SSH? (Ports 80, 25, 22).

    I dont think I need to do any king of port forwarding, I just want all ports to pass through the modem and let my system decide?

    Is this possible?

  4. Doc

    Doc Network Guru Member

    Well, put it this way: if you manage to make it work, I would REALLY like to know how you did it...

    The only reason why I dind't get rid of the thing already is that I'm hoping there'll be some sort of firmware upgrade that will turn the stupid thing into what the box says it is: a MODEM.
  5. Biker

    Biker Network Guru Member

    I believe you can configure it to become a bridge, but I haven't tried it myself.

  6. TheLawyer

    TheLawyer Network Guru Member

    Yeah i have thesame product, but when i bridge it and using the WRT54G it doesnt work, i cant get them both to work...
  7. elsevir

    elsevir Guest

    i try to configure it to become a bridge too .. but seems that with a linux box behind ... with using rp-pppoe to try to connect ... there isn't any PPP interface :(

    Anyone have good issue about "Bridge Mode only" ?
  8. Jinxy

    Jinxy Guest

    I've had mine in bridged mode and my WRT54G in PPPoE and it works fine. If I put the modem in PPPoA mode then it does NAT translation and does not do port forwarding.

  9. Ian_m

    Ian_m Network Guru Member

    Put the ADSL2MUE modeme in bridged mode, put the WRT54GS router in PPPoE mode and it all works. You do the port forwarding on the WRT54GS.
  10. jmbillings

    jmbillings Network Guru Member

    Bridged mode only or the RFC<blah> bridged mode?
    Either way it doesn't seem to work, I'm using an RV042 and if I set up the WAN1 connection on it to PPPoe and enter my ISP details, it wont connect...
    If I unplug the ADSL2MUE from the router and connect to a pc, it still seems to have the local IP (, but I thought in Bridged mode it should only have the IP of the internet connection? Dunno...
  11. exxos77

    exxos77 Network Guru Member

    The ADSL2MUE can be used as a plain old ADSL modem or as a router, and you can even do port forwarding with it, if you don't turn it off too often :)

    To use it as a modem, set it to "bridge only" mode. This way, the modem will take any ethernet traffic comming from your box, encapsulate it in ATM and send it out. All you have to do is to configure PPPoE on your box and voilà!.

    You can also configure it as a simple router: just set it it PPPoA (or PPPoE, but PPPoA is slightly better if it works), set your username and password and the modem will act as a NAT router.

    Be carefull to keep your VPI/VCI/encaps the way they are supposed to be (8/35/LLC for France), because each mode (PPPoA, Bridge, etc.) has different settings in this modem, so changing the mode could also change these settings, preventing the modem from successfully connectiong to you ISP.

    Now for the port forwarding workaround: Linksys did not include any form of port forwarding in the web interface (probably because that would render their more expensive routers useless), but the device has all the necessary tools to do that.

    1) open an SSH connection to the device and login with root/admin (or whatever password you've set).
    2) use the "shell" command and you'll be dropped to a standard unix shell.
    3) use the "iptables" command to setup the port forwarding you want.

    The only problem with this approach is that your rules will be lost upon system reset (or after a power failure). But it works well if you don't turn it off.

    For example, if you want all incoming traffic to be redirected to the address, except for HTTP traffic that should be redirected to

    iptables -D FORWARD -i ppp0 -j DROP
    iptables -t nat -I PREROUTING -i ppp0 -j DNAT --to-destination
    iptables -t nat -I PREROUTING -i ppp0 -p tcp --dport 80 -j DNAT --to-destination

    Now what would be great would be to have a hacked firmware available to give true access to port forwarding (and save the rules in non-volatile memory) and make all kind of nifty stuff like traffic shaping available. If anyone wants to give it a shot, I'm willing to help with the task.
  12. Ian_m

    Ian_m Network Guru Member

    exxos77 excellent reply. Just the confirmation info I needed.

    I have a ADSL2MUE and a Vigor2900 router awaiting a secondary 2Mb ADSL connection at my work in order to replace our existing collection of increasingly unmanagable Linux routers and boxes. Only problem at the moment it appears the local exchange is "full" and are having problems getting us a 2Mb line !!!!!!!!
  13. beeblebrox

    beeblebrox Network Guru Member

    Hi all,

    If this may help (I would be very interested in just having the "standard" firmware with a DMZ option, it should be enough for me), I found the download link from Linksys to the ADSL2MUE GPL source code:


    Crossing my fingers...
  14. Ian_m

    Ian_m Network Guru Member

    Well we finally got our 2Mb ADSl line and the ADSL2MUE configured as a modem (Linksys bridged mode) connected to a Vigor2900 has been rock solid for about the last month and a half.

    No problems at all setting up, just remember to verify the ADSL2MUE ADSL settings in modem mode are correct for your ISP before connecting to router. Set router to PPPoE enter username and password and away you go. Been doing incoming/outgoing VPN from both XP clients and other routers all works fine rock solid as per the instructions. Not seen the ADSL2MUE and Vigor2900 waver, behave funny etc etc once.

    We have been using the Netgear DG834G with latest firmware to provide VPN tunnels between the Vigor2900 and various offsite locations, all works fine and fast.
  15. online_star

    online_star Guest


    Speacial thanks for exxos77 :)
  16. atshoom

    atshoom Network Guru Member

    Hi, for my experience, i would like to say that i use the ADSL2MUE in
    both mode:
    Bridge only behind a mac os 10 computer as well as behind a WRT54G
    and it works well.
    and in PPPoE (in this way the modem has the public IP and the computer get a private one by de DHCPd server of the modem).
    so everything works well that way!
    the reason im posting is that my third ADSL2MUE went dead recently:
    since beginning of 2005:
    i bought one unit that lived 2 weeks
    ->i exchanged it at my retailler under warranty
    the second one lived 2/3 months
    ->i exchanged it at my retailler under warranty (he began to ask himself some questions about me)
    the third one recently died after approx 4 month of use.
    -> i'm gonna see with linksys and the retailer what's about this modem!!! :-(

    the problem is always the same with the 3 units that died:
    one day it stopped to work, so i reset it and it won't finish his boot.
    normally during the boot the power LED is red during approx 22sec.
    but with mine (as dead) the led is always red and the modem doesn't respond, i tried a HARD RESET as told by the linksys support but it doesn't change anything.

    So am i the only one to get dead units ? or does someone experienced the sames issue as me ? thanks for your report, ideas,etc...
  17. Biker

    Biker Network Guru Member

    I've become interested in trying this option, but I have a question.

    As far as I understand, a bridge doesn't have any IP address of it's own. Typically the firewalled gateway on the inside will handle the PPPoE stuff, setting up a dynamic IP address from the ISP's dhcpd.

    In the default setup, as a router, I can connect to the Web interface on the router for configuration, because it has an IP address.

    Now, I imagine that when I re-configure it to become a bridge, it will no longer have any IP address to reach it from the inside, i.e. from my LAN.

    So, then the question is, when configured as a bridge, how can I 'get to it' to re-configure it if I want to 'get it back'?


    P.S. I have once setup a Linux based bridge at home, but then I had a keyboard and a screen to configure it.

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