What are the IPs that will be in use during Smart Updates or ALL IPs that will be used by the Toolkit plugin?
Requests come from two locations:
1.1 The server with WordPress Toolkit installed. IPs configured for each account can be identified in the WHM List accounts interface.
1.2. The Plesk Screenshot server. This server is AWS hosted and uses dynamic IP addresses from zone EU-WEST-1.
All IP addresses from this zone can be found in the list at AWS EU WEST IP ranges.
1.3 For Licensing ka.plesk.com, IP addresses are used to verify the license.
Note: These IPs may be subject to change, so it is always a good idea to confirm which IPs are currently in use by this domain. The below article can be referenced if issues occur with license verifications.