This deprecated, read-write INTEGER selects which severity of SSH-related event log messages get passed through, with none(1) disabling logging entirely, information(2) passing informational/warning/error messages, warning(3) passing warning and error, and error(4) passing only error-level messages. Admins tune this to control log verbosity, using error(4) to reduce noise in production or information(2) while troubleshooting SSH connectivity problems. For example, setting this to warning(3) during a suspected brute-force attempt would surface failed-login warnings without flooding the log with routine connection info.