While I would agree that many ISP's are allays looking for a chance to mess things up for VOIP services, One has to consider how many complex types of attacks to their vast networks they get, Most times I doubt it is intentional, but not always. Many hacks are just looking for the knowledge of what it takes to disrupt communications. ...mike/kb8jnm On 6/23/2018 2:26 PM, Bryan Fields wrote:
We've seen some interesting connectivity issues for ATT users recently. The most recent was some sort of ALG proxy on anything destined to udp/4569. This appears to intercept registration traffic and then selectively forward it on. I'm at a loss as to why this is happening.
Last weekend ATT stopped allowing one of the subnets for the stats server in their routing table too. That was a bit easier to troubleshoot and easier to reach someone on their backbone with clue. The stats server isn't a critical part of the network either.
If you're having any issues, please try registration on port 4566.
I'll stress again, this really isn't an AllStar issue, it's a crappy ISP breaking the internet issue. There's not much the admin team can do if your ISP isn't going to route packets properly :(