Using Tomato with ADSL Router

Discussion in 'Tomato Firmware' started by RXP1, Aug 21, 2008.

  1. RXP1

    RXP1 Addicted to LI Member

    I recently moved from Cable to ADSL2+. I have the Netgear DG834GT as the ADSL router. It has a 'modem mode' with 3rd party firmware, so it acts as a pure modem but only with the wireless interface. For example, if I connect my laptop to the router in 'modem' mode the IP is the WAN ip, rather than the router IP. But it does not do this with the wired ethernet ports.

    The only other option I saw to be able to use Tomato on my Buffalo router was to set the DMZ of the Netgear router to point to the Buffalo's WAN port. It seems to be working a treat, all port forwarding and QoS is working perfectly. But I was wondering will there be any issues with this setup? I'm especially thinking things like Max connections. Although I've set them in Tomato will I also have to set them up in the Netgear?

    Thanks for any help :)
  2. pfoomer

    pfoomer LI Guru Member


    i have a DG834PN, which is no longer used as the router/modem (its my spare in case my current config goes down), however I found on the netgear forum you can use a command to put it into modem only mode, using the original software, wired mode.

    Google search

    Netgear DG834GT modem mode

    may assist you.
  3. RXP1

    RXP1 Addicted to LI Member

    I checked out the Neatgear forums, people have gotten this modem running as a modem only in wired mode (

    But the problem is my ISP has LLC based authentication, and Tomato doesn't support that. If it used PPPoE or it'd work. But it's just very strange that the same Netgear router in modem mode provides an external WAN IP to a wireless client but not a wired one.
  4. pfoomer

    pfoomer LI Guru Member


    I am using a Linksys AM200 modem with tomato, with the multiplex setting to LLC, running bridged mode PPPoE.

    To achieve this I need

    init script

    ip addr add dev vlan1 brd +

    firewall script

    /usr/sbin/iptables -I POSTROUTING -t nat -o vlan1 -d -j MASQUERADE

    and the modem set to

    Local IP Address: . . .
    Subnet Mask: . . .

    I have not tried PPPoA or any thing else as its working, however I note that the DG834PN setting was PPPoA.

    I can try an alternative setting if you wish, on the AM200/Tomato setup
  5. RXP1

    RXP1 Addicted to LI Member

    Thanks for the kind offer :) I think I'll just leave my ADSL router DMZing into my Tomato router because the bridge mode for the Netgear just won't work over Ethernet :-/
  6. occamsrazor

    occamsrazor Network Guru Member

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