iLO 2/3 and ERR_SSL_VERSION_OR_CIPHER_MISMATCH: opening the web UI from a modern browser
iLO 2 is stuck on TLS 1.0 and iLO 3 on TLS 1.1 forever. Firefox with deprecated TLS (separate profile) or Edge in IE mode opens the console; over SSH you can enforce AES and regenerate the certificate.