IP = 104.16.4.14
Content type of robots.txt is application/pdf!
Look up this url in the url tool
https://cla.dotnetfoundation.org/.well-known/acme-challenge: 200 application/pdf
https://cla.dotnetfoundation.org/.well-known/csvm: 200 application/pdf
https://cla.dotnetfoundation.org/.well-known/nostr.json: 200 application/pdf
https://cla.dotnetfoundation.org/.well-known/security.txt: 200 application/pdf
https://cla.dotnetfoundation.org/.well-known/traffic-advice: 200 application/pdf