SageMaker Studio Code Editor - Domain to Whitelist in Firewall

Hello.

I've been trying to set a secure ML environment using VPC only Code Editors. The editor app doesn't seem to work well in VPC mode. The Jupyter Notebooks do not work. I believe the problem is related to the IDE extensions and have been pin pointing what access does this IDE need to properly work.

I have found that I need to whitelist two IPs. One of them corresponds to the domain open-vsx.com. The other one corresponds to an unknown domain. Does anybody know which other domains should I request to be white listed for the Code Editor to work?

The IP (Domain) I've found to be needed are:

• 198.41.30.195 (open-vsx.com)
• 20.60.40.4 ( ? Unknown domain)