NetMon -- Readme

NetMon has the concept of a host which has many service monitors. A host may have an ICMP service check, a HTTP service check, and a SMTP service check. Those three checks are search a service monitor. Each service monitor may have a separate contact who is notified in the case of an outage in addition to the host contact. This flexibility is built in to only notify those who are responsible for particular services on a host.

Hosts range in condition from green to yellow to red. If all of the services are fully green, then the host itself is considered green. If one or more of the services have a yellow or red condition. Red is labeled if all of the service monitors are at red. Unknown status is when there are no service monitors or if all of the monitors are in an unknown state.

Service monitors range in condition from green to yellow to red. Service monitors will evaluate their past checks with the current check to evaluate status. If the status is green, all of the monitors are able to reach the service two checks in a row. If the status is yellow, one of the checks has failed (but may not mean an outage). Yellow status will also occur if we can reach your service but the expected data does not match. Red is when the service cannot be reached from our monitoring agents. Unknown occurs for a brief time when you first create the monitor and we sync up our agents.

If you want to filter or process our checks, you should configure your mail client to look for a mail header "X-DYNDNS-Netmon: Monitoring Alert".