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Use Tomato downstream of another Router

Discussion in 'Tomato Firmware' started by rizsher, Sep 5, 2007.

  1. rizsher

    rizsher Network Guru Member

    Hi,

    I stupidly signed up with Sky broadband (will be leavign them as soon as I can though), and now realise I'm *Forced* to use the Netgear 834GT wireless modem/router they supply.

    I did manage to use my own modem to connect, but was getting disc. for no reason, and each disc would only be resolved by a long call to their support line, who would very reluctancly raise the issue to a Tier 3 support level, who would then need to reset something on their end to enabel the DSL line again.. the process sometiems takes 14 hours to get to Tier 3!!!.

    So, I find myself stuck with the Netgear. Was wondering what would be the best way to setup the Netgear with Tomato so I would still be able to use the QoS feature of Tomato.

    At the moment, I've disabled DHCP on tomato, connected a cable from one of the 4 ports on the netgear to one in the Tomato router (its a WRT54GS), connected my asterisk server and ATAs to the WRT54, forwarded all the right ports thru the Port Forwarding interface of the Netgear.

    The setup works initially, but after a while, phone calls stop working. I think its to do with NATing.

    There is an option on the Netgear to disable NATing, should I disable it?. Can't recall if their is an option to disable firewall on the Tomato, if there is, should I disable it?. If I did, would that not render QoS unusable as well?.

    Please advise.
    Regards.
    Rizwan Sher
     
  2. tbjerret

    tbjerret Network Guru Member

    I have a similar problem with Telefonica in Spain.

    You could disable DHCP on Netgear, connect a cable from one of the 4 ports on the Netgear to the Wan port in the Tomato router and set Netgear to something like 192.168.0.1,Tomato to something like 192.168.0.2, but 192.168.1.1 in your Lan. Then the Netgear would more or less function as a modem only.
     
  3. roadkill

    roadkill Super Moderator Staff Member Member

    I wish I had access to that kind of router.
    the hardware is capable of running Tomato and firmware is Open Source so it's technically possible to recompile Tomato for AR7 processor type.
    I assume you are talking about DG834G
     
  4. mstombs

    mstombs Network Guru Member

    I think the sky router is broadcom chipset GT model, there's a tool here to look at it:-

    http://www.neolics.com/index.php?s=projects&p=3

    I can compile firmware for my AR7 modem but wouldn't know where to start to port tomato - I guess with Openwrt and just port the GUI from tomato? - I agree the Linux version and iptables/route commands are similar. I suspect it would be easier to Tomato a broadcom based opensource modem, but when I last looked there are huge chunks of proprietary binary modules without sourcecode:- this one for a netgear dm111PSP for example has a buildable GPL distro:-

    ftp://downloads.netgear.com/files/GPL/DM111PSP_v3.61d_GPL.tar.gz
     
  5. roadkill

    roadkill Super Moderator Staff Member Member

    looks like it has an Atheros in there 108 super g...
     
  6. mstombs

    mstombs Network Guru Member

    For wireless yes, but Google seems to think Broadcom BCM6348 for adsl, the GPL source for DG834GT-1SKUK 1.02.28 is available - maybe that will confirm?
     

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