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SSH service

SolarWinds N-central monitors the availability of a SSH daemon on a network device. SSH is a shell program for logging into and executing commands on a remote computer. It provides strong authentication and secure communications over a vulnerable connection. It also provides a UNIX shell augmented with a range of cryptographic options. 

SolarWinds N-central determines the up or down status of the SSH service. The SSH service does not use the Warning state. SolarWinds N-central averages the availability of the SSH service over the scan interval. It compares the availability of the SSH service to the threshold to determine the status.

Service Type TCP
Instances on a Device 1
Device Class Server - Generic, Workstation - Generic, Other, Printer, Scanner/Camera, Switch/Router, Laptop - Windows, Server - Windows, and Workstation - Windows
Monitored By Windows probe, Central server
Scan Interval 5 minutes
Timeout Value The time (in seconds) that the SolarWinds N-central server waits before considering the test a failure. The default is 30 seconds.
Port Number 22
Validation String

The response you expect to receive from the queried port. If queried port does not return the validation string that you specify, the service transitions to a Failed state.

The default validation string is SSH.

Status details

Status Detail Description
SSH Service Availability SolarWinds N-central determines whether the SSH service is up or down. The SSH service does not use the Warning state. SolarWinds N-central averages the availability of the SSH service over the scan interval and compares the availability of the SSH service to the threshold to determine the status.
Round Trip Time (ms) The time for a request to be sent and received.
DNS Resolution

The threshold that determines whether the device name can be resolved.

If an FQDN has been specified, the service searches for its IP address. If the IP address is found, the state will be Normal. Otherwise, it will be Failed, based on the default settings.

If an IP address has been specified, the service checks only the IP address's format. If the format is correct, the state will be Normal. Otherwise, it will be Failed, based on the default settings.