The name is a valid Google domain name and identifies its servers. For more information, see Google Help.

This firewall issue can occur when an Edge resolves * to make a WebRTC call and then sends the request to the firewall/security device. If the firewall/security device performs a reverse lookup, it receives instead of * and the call fails.

The preferred way to avoid this issue is to disable the reverse lookup functionality on your firewall/security device.
The alternative, adding to your allowlist and all the records that accompany it is possible, but problematic.

Genesys Cloud best practice specifies:

  1. Do not configure your firewall to perform reverse lookups.
  2. Do not add domain names to your allowlist.