Which domain / url needs to be opened to download reports in Identity Reporting?

We are running Identity Reporting server version 2024.2 - 7.3.1-832 (on Redhat), it's a fresh install since the existing server wasn't updated for a while.... 

Anyway, our servers are only allowed to access defined internet destinations. I didn't find anywhere what the destination adress should be for the report downloads, in the manual it's only about access to the reporting content delivery framework, but no url / domain is mentioned. What should be opened in order to be able to download the report templates?

Sorry if this has been asked before, but I didn't find any answer to this.

Thanks!

Fabian