Set the severity level for which this particular host will receive syslog messages. The input format is: <SeverityLevel/'all','on'/'off'> where SeverityLevel can be one of the following strings: 'emerg' for emergency level, 'alert' for alert level, 'crit' for critical level, 'err' for error level, 'warning' for warning level, 'notice' for notice level, 'info' for info level, 'debug' for debug level. 'all' as SeverityLevel configures the collector to receive syslog messages for all severity levels. 'on' is used to activate the host for receiving syslog messages. 'off' causes the host to stop receiving syslog messages for that particular severity level. This variable is SET-only.