Issue Curl and ping issues Google Cloud instance

[Marco Calandra]

Hi,

for a few days we have had a problem on our Linux server with Plesk Obsidian.
Plesk is installed on a Google Cloud instance and we realized that all the curl calls made by the server to configured domains
on the same server where Plesk is installed they time out. On the other hand, if they are made from an external server, the same curl calls work correctly.
Even a simple ping to a domain managed by Plesk executed from the server command line (ping domain.tld) remains hanging.
I have verified that all the doors are correctly open and in fact they are, also because otherwise they would not work from the outside. The SeLinux
is set in Permissive mode.
Do you have any idea what I can check?

Thanks so much.

Alessandro