I don't use Norton, but AFAIK Ghost doesn't have a firewall...it's just for backing up/restoring. Were there any changes in hardware or software (updating, upgrading, install new software) around the time that you started seeing the firewall?

If there's no firewall coming from software, I'd still be looking at the modem for the source of the firewall.

Have you tried resetting the modem (stick a paper clip/pen into the little hole at the back of the modem...the manual explains this more)? This would reset things back to factory defaults, so you'd have to go right back through & set up your Westnet connection again & also re-do port forwarding.

Or maybe somebody else here has some more ideas???