IP = 81.17.25.250
Content type of robots.txt is text/html; charset=iso-8859-1!
Look up this url in the url tool
https://4server.ch/.well-known/acme-challenge: 403 text/html; charset=iso-8859-1
https://4server.ch/.well-known/csvm: 403 text/html; charset=iso-8859-1
https://4server.ch/.well-known/nostr.json: 404 text/html; charset=iso-8859-1
https://4server.ch/.well-known/security.txt: 403 text/html; charset=iso-8859-1
https://4server.ch/.well-known/traffic-advice: 403 text/html; charset=iso-8859-1