Some further digging ... ------- $ dig vivianvoss.net A +short @8.8.8.8 78.46.78.181 $ curl -v4 https://vivianvoss.net/ https://vivianvoss.net/ 2>&1 | grep

Some further digging ... ------- $ dig vivianvoss.net A +short @8.8.8.8 78.46.78.181 $ curl -v4 https://vivianvoss.net/ https://vivianvoss.net/ 2>&1 | grep -E "Connected|error" * Connected to vivianvoss.net (78.46.78.181) port 443 * OpenSSL/3.0.13: error:0A00010B:SSL routines::wrong version number $ curl -s https://ipinfo.io https://ipinfo.io | grep org "org": "AS7922 Comcast Cable Communications, LLC", Same IP you're hitting, same port, but Comcast's xFi Advanced Security seems to be MITMing the connection before TLS completes. I hate Comcast so much ...