EPIC Launcher cannot access amazonaws.com adresses through corporate firewall

Dear lady or gentleman

We are trying to install Unreal Engine 4.18 behind the corporate firewalls and proxies.
The Epic games Launcher stuck in “Please Wait…” message while trying connecting a number of addresses.
We could observe some of the addresses/ports that the EpicGamesLauncher.exe is trying to connect, using the Microsoft/Sysinternals TCPView tool.

Examples:

ec2-52-204-176-69.compute-1.amazonaws.com/52.204.176.69

ec2-52-205-159-66.compute-1.amazonaws.com/52.205.159.66

ec2-54-80-35-244.compute-1.amazonaws.com/54.80.35.244

c2-34-194-27-225.compute-1.amazonaws.com./34.194.27.225

c2-34-194-96-253.compute-1.amazonaws.com./34.194.96.253

c2-52-21-143-162.compute-1.amazonaws.com./52.21.143.162

c2-34-197-110-146.compute-1.amazonaws.com./34.197.110.146

c2-52-21-90-176.compute-1.amazonaws.com./52.21.90.176

c2-34-200-161-218.compute-1.amazonaws.com./34.200.161.218

c2-34-202-241-251.compute-1.amazonaws.com./34.202.241.251

c2-34-226-131-152.compute-1.amazonaws.com./34.226.131.152

Maybe someone know a reference or documentation that contains the complete and updated list of IP adresses and Ports that should be opened in the firewall to be used by EpicGamesLauncher.
Without that, the IT Network staff will not be able to create a policy that allow the correct traffic.

We’ve done a little research in https://answers.unrealengine.com, Google and Unreal Engine guides/docs.
There are some related and similar questions and issues, but we found nothing related to the addresses that the launcher is trying to connect, until now.

Thanks in advance for any information or insight.

Best Regards,

Randolpho