ChallengeResponseAuthentication

wikipedia:Challenge–response authentication

• Man: https://linux.die.net/man/5/sshd_config

Specifies whether challenge-response authentication is allowed (e.g. via PAM or though authentication styles supported in login.conf(5)) The default is yes.

ChallengeResponseAuthentication directive in sshd_config

Related terms

• MFA
• Google Authenticator
• PasswordAuthentication
• /etc/pam.d/sshd
• AuthenticationMethods

See also

• /etc/ssh/sshd_config: AuthenticationMethods, PasswordAuthentication, PermitRootLogin, MaxStartups, sshd_config
• OTP: Deepnet MobileID, FreeOTP, oathtool, pam_oath, qrencode, google-authenticator, ChallengeResponseAuthentication, AuthenticationMethods