Is it possible - wired bridge + wireless router?

Discussion in 'Tomato Firmware' started by kornaz, Jul 17, 2009.

  1. kornaz

    kornaz Addicted to LI Member


    I have one computer (let's call it A) connected to my Linksys WRT54GL (with Tomato 1.25) trough the wire and few notebooks (B and C) using wireless connection. Is it possible to bridge wired LAN interface with computer A, so that computer A receives public IP from my ISP, etc.? I mean I want to disable NAT for wired connection completely, for performance reasons, but leave NAT for wireless clients - they should still be routed/NAT'ed through Linksys. Do I need 2 IPs from my ISP (one for nat'ing wireless clients B and C, one for wired computer A) or is it possible to set everything up with only one public IP?

  2. dvaskelis

    dvaskelis Network Guru Member

    To literally do exactly what you describe would require two IP addresses and manual configuration outside the GUI. However, using a DMZ would likely accomplish pretty much what you're trying to do with one IP address by checking a box in the GUI. It's still routed however, but to the outside world the DMZ would completely appear to have the external IP address,

    If you described why you are trying to do this, it's possible you might get some suggestions that would solve your problem without a DMZ.
  3. kornaz

    kornaz Addicted to LI Member

    I have 100 mbps connection from my ISP. Unfortunately, WRT54GL is not powerfull enough to NAT all this 100 mbps. For example, I get max 7.2 MB/s (~55-60 mbps) with torrents when computer A is routed through Linksys (router CPU usage is almost 100%, load goes up to 1.5 or so). If I connect ISP cable directly to computer A, I can easily get ~11 MB/s with torrents (almost full 100 mpbs is utilized). I believe that DMZ is not an option, because traffic would still be routed/nat'ed.
  4. dvaskelis

    dvaskelis Network Guru Member

    DMZ wouldn't help what you're actually trying to do, which is squeeze more packets out of the router. Two IPs to one Tomato-based device that will leave one of the IPs on the hardware switch and then route the other IP sounds like it's in the realm of possibility, although a little complex.

    My first thought is you've outgrown your cheap little Tomato-based router. It might be time for a "real" router, or at least an inexpensive Linux-based PC as your gateway router/firewall.

    My second thought, if you want to push Tomato to the edge, is to make sure you have one of the better performing Tomato routers (like the Linksys WRT54GL or WRT54G-TM), use one of the Tomato forks that incorporate SpeedMod, overclock to 225-250Mhz (maybe even put on a heatsink and go beyond that), and keep the configuration as lean and mean as possible (Conntrack table as small as possible, can you live without QoS, etc.). I don't know how far performance could be pushed, but perhaps you can get there...
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