I've had issues with wifi calling on Palo Alto as well as delayed SMS delivery and receive.
I had to allow port 500 and 4500 out to get this working properly. I am planning on trying to implement a whitelist using IPs/domains in the future. --Brendan On Fri, Aug 2, 2024, 12:26 <chuckchu...@gmail.com> wrote: > Thanks all. Oddly enough, it seems that the entire site’s userbase > suddenly started working. From what I understand no action was taken to > fix anything. So unless a dynamic PaloAlto update broke it and then > unbroke it later, I’m not sure what was going on. I’ll debug a bit to know > what a working baseline looks like, since I’m not sure. > > > > Thanks again, > > > > Chuck > > > > *From:* Tom Beecher <beec...@beecher.cc> > *Sent:* Friday, August 2, 2024 2:03 PM > *To:* chuckchu...@gmail.com > *Cc:* nanog@nanog.org > *Subject:* Re: Wi-Fi Calling in a corporate environment > > > > My understanding has been that generally, if the cellular network signal > was above a certain threshold, phones won't even attempt to use wifi > calling. Some carriers used to let you flip a switch to force the phone to > prefer wifi over cellular, but some have removed that. ( Verizon for > example. ) > > > > In my experience some years ago in a similar environment, that > cellular threshold to switch was set so low that it was useless. I could be > standing in a spot with barely tickling the bottom bar, and nothing. If I > flipped to airplane mode, was able to wifi call instantly. > > > > On Fri, Aug 2, 2024 at 11:11 AM <chuckchu...@gmail.com> wrote: > > Hey all, > > > > Question if anyone knows about cell phone wi-fi calling in > US. Googling isn’t finding what I’m looking for. We have a corporate site > in US where users have BYOD capability, and use their phones with wi-fi > calling enabled. Site uses a single NAT address (IPv4) for BYOD access. > Recently the site reported wi-fi calling had stopped working for all user > phones, Apple and Android, all about the same time. The guest network did > have some bandwidth limitation applied and they had overuse. That was > since resolved, we upped the bandwidth. But the phones all still avoided > wi-fi calling. It’s a manufacturing site with known cell signal issues, so > most users had no signal via carrier. I did not get a packet capture yet > to see what could be going on, we’re 99% sure we’re not blocking traffic. > I’m wondering if the phones have an algorithm to test wi-fi signal, and > perhaps the carriers will blacklist public IPs with known wi-fi calling > issues to avoid cases where an emergency call can’t be made because of > intermittent bad performance? It seems odd that even when no bandwidth > issues exist, it’s not attempted. > > > > Thoughts? > > > > Thanks, > > > > Chuck Church > >
