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Redux 2.0: iPhone Wi-Fi Calling Firewall rules

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Hello all,

Almost 3 years ago I started a thread to document the IP addresses that Verizon is using to allow Wi-Fi calling for iPhones. { iPhone Wi-fi calling firewall rules }. Back in September of 2018 I posted an update, adding more IP's needed. {Redux: iPhone Wi-fi calling firewall rules }

I'm posting this update as recently Wi-fi calling stopped working for us. After reviewing some firewall logs I've found 1 more IP I'm adding to our list. Here is the list as we have it:

141.207.137.233

141.207.177.233

141.207.193.233

141.207.225.232

141.207.227.232

141.207.229.233 - Added this one yesterday.

We also have the following IP addresses allowed for T-Mobile Wi-Fi calling.

208.54.37.80

208.54.38.83

208.54.70.107

208.54.85.108

208.54.85.109

This is specifically for corporate firewalls where outbound traffic is controlled/limited to expected destinations.

Here are the ports allowed:

ike udp port 500

ipsec-esp-udp port 4500

Some recommended trying the settings on this page: Unblock Ports / IP Addresses - Verizon Wireless Network Extender | Verizon Wireless. However, the IP addresses on this page do not match those needed for outbound Wi-Fi calling.

Hope this helps someone else out there.

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