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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.