<methodname> authentication failed. Login to account <loginname> not allowed or account non-existent.

The system administrator has denied logging in for the user, or the user is trying to log in using a non-existent account.

Facility: SSH_LOGFACILITY_AUTH

Level: SSH_LOG_WARNING

User <login-name> does not exist.

Authentication failed because the specified user account does not exist.

Facility: SSH_LOGFACILITY_AUTH

Level: SSH_LOG_WARNING

root login denied for user '<<login-name>>'.

User tried to login as root (administrator), but system policy does not allow root (administrator) logins at all or with password authentication.

Facility: SSH_LOGFACILITY_AUTH

Level: SSH_LOG_WARNING

User <login-name>'s login is not allowed due to system policy

Authentication failed because the system policy does not allow the user to log in. The account may be locked or expired, for example.

Facility: SSH_LOGFACILITY_AUTH

Level: SSH_LOG_WARNING

User <login-name> is denied login because username matched with the deny list.

Authentication failed because the specified username is included in the server's denied users list.

Facility: SSH_LOGFACILITY_AUTH

Level: SSH_LOG_WARNING

User <login-name> is denied login because allow list exists, and username was not matched.

Authentication failed because the specified username is not included in the server's allowed users list.

Facility: SSH_LOGFACILITY_AUTH

Level: SSH_LOG_WARNING

<methodname> authentication failed. Connection from <hostname> denied. Authentication as user <loginname> was attempted.

The server has determined that the user is not allowed to login from the current host.

Facility: SSH_LOGFACILITY_AUTH

Level: SSH_LOG_WARNING

Login not allowed because host's IP address (<ip-address>) could not be mapped to a hostname and reverse mapping is required.

The server could not map the connecting host's IP address to a hostname and the configuration option RequireReverseMapping is on.

Facility: SSH_LOGFACILITY_AUTH

Level: SSH_LOG_WARNING

Login not allowed because the connecting host (<hostname>) is on the server's deny list.

The connecting host is on the server's denied hosts list, so the authentication is not allowed.

Facility: SSH_LOGFACILITY_AUTH

Level: SSH_LOG_WARNING

Login not allowed because the connecting host (<hostname>) is not on the server's allow list.

The connecting host is not on the server's allowed hosts list, so the authentication is not allowed.

Facility: SSH_LOGFACILITY_AUTH

Level: SSH_LOG_WARNING