IP = 23.185.0.1
Content type of robots.txt is text/html; charset=UTF-8!
Look up this url in the url tool
https://training.linuxfoundation.org/.well-known/acme-challenge: 403 text/plain; charset=utf-8
https://training.linuxfoundation.org/.well-known/csvm: 404 text/html; charset=UTF-8
https://training.linuxfoundation.org/.well-known/nostr.json: 404 text/html; charset=UTF-8
https://training.linuxfoundation.org/.well-known/security.txt: 404 text/html; charset=UTF-8
https://training.linuxfoundation.org/.well-known/traffic-advice: 404 text/html; charset=UTF-8