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External IP address checker

Discussion in 'Tomato Firmware' started by baldrickturnip, Aug 28, 2008.

  1. baldrickturnip

    baldrickturnip LI Guru Member

    my internet connection is a Huawei 960 modem which does not support modem bridge or DDNS so I have a 54GL behind it running tomato 1.19 and in the DDNS section I have Use External IP address checker for IP address.

    I am using DynDns - dynamic as the service
    I have the username , password and hostname filled in
    I have added the hostname to the dyndns account settings.

    but no joy

    from the 54GL I can resolve checkip.dyndns.com and www.dyndns.com with the ping tool.
    I have enabled upnp on the Huawei in case it was needed.

    still no joy

    I will recheck my setups for the dyndns account - but if anyone has any ideas I would appreciate them
  2. humba

    humba Network Guru Member

    Does it say anything under "Last IP Address" and "Last Result"? Anything in the router logs on this subject?
  3. baldrickturnip

    baldrickturnip LI Guru Member

    last IP and last result just have a dash

    this is the only bit in the logs that I can see that might be
    I did a force update then looked at the logs

    Aug 28 19:54:31 daemon.warn httpd[227]: http_id mismatch
    Aug 28 19:54:42 daemon.warn httpd[228]: http_id mismatch

    ok - on DDNS 2 ,I selected openDNS , signed up for an account etc

    when I select it from the dropdown it says this underneath
    * This service determines the IP address using its own method.
    then is says

    (Current DNS:

    which is incorrect as the WAN of the Huawei UTMS is 116.197.215.x

    is there a way I can see what External IP checker is determining from checkip.dyndns.com ?

    I need to see it on the 54GL as I forgot to forward the VNC port on the Huawei to a machine I was using before I changed its gateway to the Huawei and now I am locked out of it until tomorrow. :D bah
  4. baldrickturnip

    baldrickturnip LI Guru Member

    Can anyone point me in the direction of where the DDNS stuff resides in the tomato directory structure.

    the thought I had was that as I am not using the WAN port on the 54GL to connect to the router port of the Huawei e960 so maybe the External IP checker is not getting its request out to checkip.dyndns.com

    is that a sensible idea or would the 54GL route the request through its LAN ports as a matter of course ?
  5. kevanj

    kevanj LI Guru Member

    Any reason you are not using the WAN port on the router to connect to the modem (or am I missing something here)?

    You can check what checkip.dyndns.com sees simply by browsing it (if that is what your question was)

    And yes...the DDNS function of the router is designed to work over the WAN interface, so that is where it should send it out....
  6. baldrickturnip

    baldrickturnip LI Guru Member

    I am using a Huawei e960 UTMS 2100 unit as the modem with M1 branded firmware. this unit has 4 LAN ports ( wifi which I disabled ), but the firmware does not support DDNS - it is very basic. So I have added a 54GL with tomato to do wifi and I was going to use it for DDNS also. I have used the LAN ports so I can have the router IP of the Huawei and the Router IP of the 54GL on the same network as I did not think I could use the WAN port for this purpose.
    hope that makes sense :)
  7. kevanj

    kevanj LI Guru Member

    OK, it seems to me that you should be able to connect the WAN port of the WRT to one of the LAN ports on the Huawei, set the WRT WAN settings to DHCP, so that the WRT gets a WAN IP from the Huawei, then set the WRT LAN IP range to something different from the LAN IP range on the Huawei. Your wireless clients will get IP addresses from the DHCP range on the WRT.
    For DDNS, set 'Use External Address Checker' on the WRT, and it should detect the address on the WANside of the Huawei.

    Alternatively, you could just run a DDNS update client on a machine inside your LAN.
  8. baldrickturnip

    baldrickturnip LI Guru Member

    Just for the record it seems that external IP address checker only asks through the WAN port.

    I ended up setting a static IP on the WAN and connecting it to the Huawei and the external IP checker resoves and updates the dyndns account without a problem.

    It just meant I had to forward the port from the Huawei WAN to the 54 GL WAN and then forward again from the 54 GL WAN to the camera.

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