For me there does not *appear* to be CGNAT as I can ping the client IP and if we kill power to the modem the pings stop. On 9/10/24 4:27 PM, Jon Lewis wrote:
Are you aware of whether or not Xfinity is doing CGNAT for either of you? Googling, I get conflicting results, some saying they use CGNAT, some saying they don't. If they do, I wonder if their CGNAT routers have SIP ALG enabled or disabled. Unfortunately, these are the sorts of questions I suspect first level support can't help you with.
On Tue, 10 Sep 2024, Matt Hoppes wrote:
So not even the same area then.
We've now spent 2 hours on the phone and have gotten nowhere with support.
Hoping someone here at XFinity can chime in and provide some offline assistance.
On 9/10/24 3:59 PM, Norman Jester wrote:
Saint Helena, CA near Napa
Norman Jester
On Sep 10, 2024, at 12:52 PM, Matt Hoppes <mattlists@rivervalleyinternet.net> wrote:
Well this is curious....
Same issue... they are breaking something with registration. What region are you in? We are in North Central PA so we're routing
On 9/10/24 3:25 PM, Norman Jester wrote: Your message is timely for me. I literally have the exact same issue. I setup phones for my daughter’s home and she got Xfinity. Everything worked for a few minutes then I could not keep phones registered after. Norman Jester
> On Sep 10, 2024, at 12:18 PM, Matt Hoppes > <mattlists@rivervalleyinternet.net> wrote:
I have an employee who has recently switched to Xfinity cable service. Ever since they switched their internet service their work phones will not stay registered for more than about 3 minutes.
These same phones have been used on many ISPs without issues. The same config has been used behind multiple levels of NAT without issues.
She was fine, until she switched to XFinity.
Of course, XFinity support is absolutely worthless.
Anyone from XFinity Tier 3 or such that might be able to offer assistance?
I suspect it's something stupid with either NAT overload in the modem or the modem not keeping the SIP channels open.
I've tried playing around with registration times without any success. And again, we've never had issues with these phones or this setup with any other ISP.
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