Network error problem

I am using a MacBook Air and since recently I have problems with the network connection on my desktop although I have normal access to the internet. I tried several times to reinstall. The system reports "Zeit├╝berschreitung bei Socket operation / network timeout during socket operation.
Very grateful for help!
Kind regards

Please post more details e.g.

nslookup cloud.server.tld
ping cloud.server.tld
host cloud.server.tld
traceroute cloud.server.tld
netcat cloud.server.tld 443

Test on your server e.g.

netstat -tulpen
netstat -tulpe

Deactivate all firewalls and ad-blocker for testing.

Wher can find these Details??