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Forum Discussion
T Mobile Wifi calling issues
Upgraded from Nighthawk RAE500 6E router because of new home. Using the new Orbi 6E Mesh system. On T mobile. Wifi calling worked great before the switch but now it is intermediate at best. Most time...
WiFi Calling does (and must) work without any port forwarding (how should it - considering there can be >250 LAN clients?) or any kind of SIP ALG.
To get some ideas what in involved, here is what T-Mobile (US) does unveil e.g. for business firewall deployments: Wi-Fi Calling on a corporate network
I agree with you that it SHOULD work without port forwarding, but I just tested it by disabling my firewall rules for ports 500 and 4500, and WiFi calling fails. As soon as I reenable the rule on those ports, my phones can make a connection on those ports and it works again. To be clear I'm using a dedicated firewall, not some settings within the Orbi.
F_V wrote:
... I just tested it by disabling my firewall rules for ports 500 and 4500, and WiFi calling fails. As soon as I reenable the rule on those ports, my phones can make a connection on those ports and it works again. To be clear I'm using a dedicated firewall, not some settings within the Orbi.
Great - so it's not the Orbi system in our case!
Off topic then: Whatever unknown firewall (or other Internet security garbage on the end point) you might have in place, some have default policies blocking virtually everything, including IPsec - IKE Authentication (udp, port 500) and IPsec NAT traversal handling Encrypted voice traffic (udp, port 4500), in both directions, incoming and outgoing.
That all does not help the OP, unless sbatchik does also operate an in-band firewall device, or some "block everything" default end point security.
Well, in my case I couldn't tell you whether the Orbi had anything to do with it. I ran my last RBR50 and now the RBRE960 in AP Mode, which doesn't give me any access to those WAN settings on the Orbi (no reason for it to do so). Your strong IT sarcasm of "whatever unknown firewall internet security garbage" is noted and highly appreciated, thank you for that.
We also don't know what other things changed in this guy's home. He implied wifi calling stopped working when he moved to a new home, so perhaps the upstread equipment, dare I say some internet security garbage, is the culprit 🙂