Could a similar problem be happening in Albany, NY area?
I have a problem reconnecting my ATT mcell.
Solved! Go to Solution.
I found another similar case.
The previous posting is from February 2014, and was closed successfully. If you cjhoose to open a service ticket with TWC and AT&T, you should refer them back to the original complaint. Since your complaint infers selective blocking of network traffic (UDP ports 4500 and 500 to and from AT&T) you should also involve the FCC and your state regulator of cable sysstems. Their contact information is, by law, printed on your monthly TWC bill.
I presume you did read the second earlier thread, and I know MsRaye will also. The rented combo modem-router was the problem. You will need to purchase a separate router. Unfortrunately I didn't see the Netgear model number listed.
Long story short: Combo modem+router will not work. Bridged Arris Tg1672g> Factory Restored Netgear Router> M-cell = Successful connection!
I'll bet DMZ is dsabled in the router even though it apopears to be active... Turn it off then back on, if it works for a few days then quites, get a real router and rid of twc's all in one routing by shoving it into bridged mode...
or the ports are blocked at TWC's servers... That will require FCC intervention if a call to TWC's NOC won't help.
After more searching, I found a solution and the mcell is working fine now. I had fthe irewall set to medium, and port 500 is not on enabled list. The other 3 ports are listed 123, 443 and 4500 on medium. Firewall needs to be on low and all ports are enabled.TWC is not the problem.
Somehow I thought that port forwarding would function even if ports were not in the firewalls enabled list, but this link has a different answer.
Reference found — NOTE 3: If the firewall is set to High or Medium, port forwarding feature will be inoperable. The firewall needs to be set to Low to function.
I still do no understand why DMZ did not work with firewall on medium? That answer was not located in my search. Since the cell is working, I stopped searching.
You never did tell us the make and model of your modem and router, whether it's a rented combination unit or two separate boxes that you purchased. From the link it looks like you might be using an Arris SBG6580 combo which we don't recommend.