openssh.unsupported events

12/07/2023 Contributors

openssh.unsupported.cipher

Severity: ERROR
Description: This message occurs when an unsupported cipher is used while attempting an SSH connection.
Corrective Action: Attempt to connect with SSH by using a supported cipher.
Syslog Message: Attempted an SSH connection using unsupported cipher %s.
Parameters: ciphername (STRING): Cipher used for the SSH connection.

Severity: ERROR
Description: This message occurs when an unsupported host key algorithm is used while attempting an SSH connection.
Corrective Action: Attempt to connect with SSH by using a supported host key algorithm.
Syslog Message: SSH connection from %s was attempted using an unsupported host key algorithm %s.
Parameters: ipaddress (STRING): IP address of the remote host that was trying to establish an SSH connection.
hostkeyalgorithm (STRING): Host key algorithm used for the SSH connection attempt.

Severity: ERROR
Description: This message occurs when an unsupported key exchange algorithm is used while attempting an SSH connection.
Corrective Action: Attempt to connect with SSH by using a supported key exchange algorithm.
Syslog Message: Attempted an SSH connection using unsupported key exchange algorithm %s.
Parameters: kexalgorithm (STRING): Key exchange algorithm used for the SSH connection.

Severity: ERROR
Description: This message occurs when an unsupported Message Authentication Code (MAC) is used while attempting an SSH connection.
Corrective Action: Attempt to connect with SSH by using a supported MAC.
Syslog Message: Attempted an SSH connection using unsupported MAC %s.
Parameters: macname (STRING): MAC used for the SSH connection.