When I tried to log in https://webchat.freenode.net/, this error shows:
Closing link: (~web-4@xx.x.xx.xxx) [You must use TLS/SSL and authenticate via SASL to connect to freenode please visit https://irc.com/login/sso in order to create an account. SASL Configuration: https://freenode.net/kb/answer/sasl - Webchat: https://webchat.freenode.net/]