hi guys, I am having a similar problem, except my IP address updates at DynDNS but my domain (one24chaffey.ath.cx) doesnt resolve from outside my network!
i have tried hitting my server using just my IP address, but that doesnt work either, maybe I am posting in the wrong topic but i'm not sure what else to do.
I have been using this in-built updater for a few years now on telstra and ncable broadband accounts and i'm only having problems now that i'm with Optus, I have spoken to their tech people who have assured me that they do not block any incomming ports, but that's what it seems like is happening.
any help is appreciated.
Cheers
Zach Fleming