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DDNS Update Frequency

Discussion in 'Tomato Firmware' started by scrupul0us, Dec 22, 2007.

  1. scrupul0us

    scrupul0us LI Guru Member

    How often does DDNS update with the selected services? Only when the router detects a change in its IP address?
  2. j.m.

    j.m. LI Guru Member

    In the past, Tomato updated DDNS only when the WAN IP changed (which could be almost never). I thought that a feature had been added to recent versions of Tomato such that it would update at least once every 28 days or so, regardless of whether the WAN IP had changed. However, I am not sure this feature is working because I just received an email from No-IP.com that my DDNS entries are about to expire because they have not been updated since November 2. If the feature were working, it should have been updated since then...

    I will say that Tomato's DDNS status appears to get stuck at "Updating" sometimes, so that may be the real culprit.
  3. ljohnson15

    ljohnson15 LI Guru Member

    To "force" an update I use the following and it seems to work perfect from the command line:

    nvram set ddnsx0_cache=
    You can then schedule the above to run every other day or so via cron instead of using the web interface manually..
  4. KK1L

    KK1L Guest

    DDNS keepalive using WAN UP script

    I took the advise and put this in the "WAN UP" section of the script page. This will be run at boot or when the WAN is reconnected. It works well as a keep alive.

    nvram set ddnsx0_cache=ddns-update

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