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ndemou
Asked: 2018-05-15 05:21:17 +0800 CST

pfsense: dynamic dns doesn't update automaticaly - it knows it's outdated

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I'm using dyndns with pfsense and I have a router connected on the WAN line (DHCP configuration). Every few days my ISP changes my IP and pfsense fails to update it automatically. If I open the WebUI and visit the dynamic dns service it shows my IP in red color because it knows that it's not the current one. If I click "save and update" it correctly updates the IP.

pfsense

1 Answers

  1. It appears that this is a known limitation[1] when pfsense is connected with your modem/router using TCP/IP (either static or dynamic). The workaround is this:

    Install the cron package (System > Package Manager > Available Packages, search for cron and click INSTALL). Then go to Services > Cron and click edit(the pencil) on the line about rc.dyndns.update. You need to change the Minute to */5 and Hour to *. This will make pfsense to check for IP changes every 5 minutes.

    Notes [1] There is a closed bug report https://redmine.pfsense.org/issues/2148 where the pfsense team suggests this workaround. They feel that the issue affects such a tiny share of pfsense users that it's not worth fixing.

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