I've just booted up my old computer that hasn't seen the internet in a year.
When I last used it trainer authentication was fine.
The old computer, even after the latest boot up, has performed no AV or firewall updates.
Now however, it has the same trainer authentication problem.
I've already disable my router and modem firewalls.
Could Comcast be blocking outgoing port 80 for anything other than web browsers?
I know you probably still don't have any suggestions, but I'll keep updating this thread as I discover more about this issue.
I have Comcast as well and have not had this issue, however, since you have also used an older computer to test the very same thing then it has to be some kind of ISP issue, I wonder if somehow they have blocked the CH authentication server/service from returning any information or just plain blocking it altogether.
I'm going to assume it is *not* the same server as the Website but of course there maybe no way to tell without contacting Comcast for assistance.
Maybe they can confirm if there is no return packets coming from the authentication server or simply any packets being sent to that server are being dropped.
In general when something is labeled as an upgrade, one expects an increase in performance, reliability, or broadly bettering of current circumstances.
After some reading linksys has bungled the firmware at each version, as the most stable firmware is the shipped version.
I've found a website that archived the older firmwares and "downgraded to that."
Initially I changed firmware because the router was having new device connection issues, where it wouldn't allow the new device to identify the network type or the internet gateway. It hadn't had problems like that before and I was wondering if it was getting too old and worn. So before I went out to buy a new router, which I may do anyway in the near future, I thought I would exhaust my options of fixing that situation. Plus older firmware seems like a security risk.