Starting this week, Facebook for Android stopped working while under my home network. At first I thought it was just an issue with my Access Points, and rebooted. It did not fix the problem, so I went ahead and rebooted my main router running DD-WRT. Still with the same issue, I decided to reboot the U-Verse gateway. Unfortunately nothing seemed to fix the problem.
I performed some research online and found out that by changing the MTU size of my main router, it might fix the problem. I went ahead and plugged in 1492 instead of the default 1500; done. It fixed the issue immediately.
I wonder why it started happening all of the sudden as it never gave me any problems with the MTU size of 1500 for at least a couple of years. My guess, AT&T made some changes.
Go to this link for instructions on how to get the best MTU size.
Quick post here regarding my Voice over IP provider, Future Nine, and the Analog Intercom/Buzzer at the front gate of my community. When someone dials-in from the main gate, I need to pick up the phone and press 9 to open it. It has not been working as of late, and the only way to circumvent the challenge was to reset the Linksys VoIP box. It would last a few minutes.
My current internet provider is AT&T U-Verse. The VoIP box is plugged directly to the U-Verse gateway.
Future Nine replied to my concerned and suggested to make these changes under the advanced tab (LAN port, default gateway IP – http://192.168.0.1/admin/advanced)
SIP Port: 15060
I am currently testing the changes, and will update with results in the next few days.
The service is now working properly. It seems that AT&T blocks port 5060 for their own VoIP service.
So I’ve been using U-Verse internet service for almost a month. I experienced occasional dropped connections and could not find the source. As usual, AT&T’s technical support has been completely useless.