Using it as AP

Discussion in 'Tomato Firmware' started by micko_escalade, May 9, 2011.

  1. micko_escalade

    micko_escalade Network Guru Member


    friend of mine went To Europe and I gave him Linksys WRT54G with
    Tomato 1.28 on it. He hooked it up to Getnet ga-121a modem/router and can't get
    internet. Reason for that I think is because both have ip:
    so if changes on tomato to then it should work?
    If that doesn't work how do I make Tomato act as AP?

    What is the best option to leave it as assuming both work (AP and ip change)?
    I would test my self but I've switched to pfSense and don't
    have regular router.

    Any help is appreciated!
  2. R0B0T

    R0B0T Network Guru Member

    Well I would say changing the router IP is a good start!

    you could even do something like

    Router IP:

    DHCP Range: -

    Leaves room for 247 Hosts.

    So what will have is the router will decide its Wan IP address is

    But if the modem should be bridgeing and providing a WAN IP address from the provider. instead of a default Private ip like

    However since you said its a Modem/Router I suppose its running its own DHCP. With some vendors you can put those in bridged mode so they no longer act as a router.

    You would have to directly connect to the modem and see if you can browse the interface and see if there is a option for bridged mode. This was a common practice for DSL modems provided by SBC DSL back the day here in the states.
  3. micko_escalade

    micko_escalade Network Guru Member

    Thanks for the quick reply!

    I'll talk to him tonight and will guide him thru.
    While he's hooked up to modem/router I'll have him run ipconfig that should reveal if DHCP server is running.

    Will post back.
  4. micko_escalade

    micko_escalade Network Guru Member

    No luck.

    We've changed Tomato router IP to:
    and DHCP Range: -
    after he hooked up Tomato to this modem/router it was giving him some "modem" error and there was no internet.
    I'm afraid to mess with his modem/router settings. If I brake it then there won't be internet at all :)

    I was able to login into his modem/router and DHCP server was running but for some reason he has static IP setup along with DNS ip from his ISP?
    Why DHCP won't work then?

    This is the screenshot of his connections:
  5. R0B0T

    R0B0T Network Guru Member

    Well if that image is from his computer? It looks like he might have ran the CD that came with his modem/router from the ISP and it automatically setup a static IP and dns for his PC. He needs to check the box Obtain Ip Address Automatically and Obtain DNS automatically. Then he can connect tomato router to modem, tomato WAN should be set to DHCP, and he will automatically obtain a 192.168.3.xx address from Tomato. And tomoto will communicate with his modem/router. However this is not the ideal setup. Ideally you want to take routing away from the ISP provided modem.
  6. micko_escalade

    micko_escalade Network Guru Member

    Yes, that's his compcomputer.
    In Tomato WAN is setup to DHCP but still be wasn't able to get internet.
    I even told him to take desktop out of the picture and hook up modem to
    WAN port on Tomato and then port #1 to his laptop. Still no go.
    It got really late last night so I had to go to sleep. We'll try again tonight.
  7. 4char

    4char Network Guru Member

    Did he change his computer to use DHCP, instead of static IP?
  8. micko_escalade

    micko_escalade Network Guru Member

    No, he did not. But that should not have any impact if he connects totally separate laptop (with obtain automatically IP + DNS) and disconnects desktop with static IP, correct?
  9. micko_escalade

    micko_escalade Network Guru Member

    I'm giving up :(

    Basically what I had him do is disconnect desktop and connect laptop to port #1 on Tomato and on WAN connect modem.
    Then on Tomato for Wan/Internet instead of DHCP I've changed it to static
    and new fields showed up so I entered:

    so that should tell tomato that on WAN port there should be connected to modem and ask for which is free IP then since DHCP server is enabled on Tomato it should give internet but no luck.

    It's gotta be something with PPPoE and I'm not familiar with that at all.

    He'll have some guy help him with that who is more familiar with how DSL modem/router is setup there.
  10. R0B0T

    R0B0T Network Guru Member

    Well there are some assumptions that need to be cleared up here.

    First off, this modem/router that the ISP provided. If you connect a DHCP laptop to it does it pull a IP address? If it does then it is acting as a DHCP router of some sort.

    Secondly if it is. What is the Network IP address it is using for DHCP? is it

    If it is then this is how you should configure the Tomato device to work. Assign it a Static IP like or 3 like you say so you did. Then in Tomato Disable DHCP. it will act as a access point for the ISP provided Modem/Router. Which efectivly means your tomato router is still doing nothing. Oh his PC it should be set to obtain IP/DNS automatically. Just for testing this. You can go back to static later if you want.

    You also need to understand that if the ISP provided router/modem is handleing all your IP resquest and routing that putting a Tomato router behind it wont benefit you much. It would just be a AP. However I believe you do understand that as this thread is titled "Using it as AP."
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