Works fine on intranet but not via Internet: Netgear WGT624

[Kenneth Obel]

Appreciate any help.

I installed RealVNC 4.1 Free Edition, using NO-IP to take care of my dynamic
addressing issues.  Worked fine from the get-go, both locally and from work
over internet.  I did not even need to set up port forwarding on my Netgear
WGT624 router.

Suddenly, it has stopped working via the Internet, though it still works
fine over the LAN.  I have tried forwarding ports 5900-5910 and 5800-5810,
and still does not work.  I disabled fast-user switching (which HAd been
enabled) and turned off remote access -- and still no luck.

What else can I try?

Thanks,
Ken