UDP Services are usually very difficult to monitor due the nature of the UDP Protocol. However there are many services, specially gameservers, who respond on UDP requests and so can be monitored.
Monitor Name
This is the name that you specify at the time of adding action in the 'Initial Name of the Monitor' field.
Monitor Comments
Here you can add a description or write down some Comments for the added Monitor.
Polling frequency
Defines the interval of how often the Monitor does perform it's checks.
Minimum failed times
If the Monitor check fails for the count of minimum failed times, an alert will be generated. The default is set to 2 which is a good setting to avoid false alerts.
Enable Flatfile Detailed logging
This setting will enable flatfile logging of the activity for this monitor. The logfile will be stored in the logs directory of AliveMon. Please note that the logformat may change in future versions.
UDP Port
The Port you want to monitor over UDP.
Timeout
Defines how long the Monitor will wait for TCP Connection.
Select UDP Message to send
here you can select a predefined UDP Message you want to send. Usually these are very binary related messages, so they may will not show correctly in the message field. Note that most UDP Services will only send an answer back when the request was correct.
I want to customize the UDP Message
If you need to customize the message you want to send over UDP, you have to enable this option.
Check for the Message Content in the UDP Reply
Enable this option if you want to verify the response of the UDP request. This is similar to the message content check in the TCP Monitor.