To enable you to bypass your firewall and whitelist Redgate endpoints for updates, licensing and authentication. We recommend that you use the DNS names instead of the IPs as we don't guarantee to keep them constant.
Our server details to bypass the firewall are:
DNS licensing.red-gate.com, productlogin.red-gate.com,
productloginauthentication.red-gate.com and update.red-gate.com
IP - N/A this changes constantly
Using HTTPS (port 443) and HTTP (port 80)
The full list of endpoints relating to licensing:
The locally (to you) hosted endpoints for the Redgate Client service are ports 22221 - 22223 by default (e.g. 127.0.0.1:22221)