Whitelists
Wildcard Whitelist
*.servicebus.windows.net
Domain Name Whitelist
IP Address Whitelist
Caution
We do not recommend this method as the IP addresses will change over time. Unfortunately, we cannot change the behavior of the relay service. If you'd like to discover which IP addresses are currently in use, you will need to run a Powershell script from Microsoft, which you can download from here. We've included the IP address in the CSV file attached to this article, but they may be out of date by the time you are reading this article.
When you run the script, you will need to enter the namespace for our relay, which is win911mobileproductionrelay. The script will discover all the IPs currently in use and display them.
A gateway address will look like this, g0-prod-dm2-004-sb.servicebus.windows.net. They will increment to g63-prod-dm2-004-sb.servicebus.windows.net.