Check manual page of check_tcp
Connection to a TCP Port (unencrypted or with SSL)
This is an active check that connects to any given TCP port and checks
if the connection could be established. Therefor it can be used to check
nearly any TCP based service on the monitored machine. SSL can be activated
to connect to any SSL encrypted service.
Thresholds for the response time can be configured for WARN and CRIT.
You can give a string to send over the connection and define a string to
expect in the response. A given string to send for terminating the connection
can be configured too.
If using SSL you can configure to check for expiration of the SSL certificate
within the next days.
This check can be configured by Wato.
No discovery supported.