I am having the exactly same problem with getting the proper IP to be sent to DYNDNS for updating but with the help available here I'm 90% there. I recommend you use, even though you said you don't want to, IPCHECK at ipcheck.sourceforge.net. With a little reading, it is very well explained, I now get my SME box to send the proper IP to DynDns. Now the trick is to getting it to run as a cron job automatically even after a reboot.
I have played with Linux before but my experiences with SME server has taught me more in a short time than more general purpose distributions. This is just my experience though.
John wrote:
>
> I am running e-smith version 5.0 behind a linksys router in
> "server-only" mode. It is my understanding that the dynamic
> DNS updating functionality is disabled when running in this
> mode. I would like to enable it! My preference is to use
> Mitel's built in functionality rather than a 3rd party module.
>
> Since I have a DYNDNS.ORG dymanic IP account I assume that a
> few tweaks to a conf file will be all it takes to enable this.
>
> Many Thanks,
> John
>
> PS: Thanks Mitel! I would never have ventured into Linux if
> it was not for e-smith. And I installed my first RPM
> yesterday! I can't believe how small and fast everything is
> in the linux world. It is terrific!