The SSH Detector incorrectly detects SSH on some devices.

telnet 10.61.19.2 22
Trying 10.61.19.2...
Connected to 10.61.19.2.
Escape character is '^]'.
Connection closed by foreign host.

Note that there is a connection to port 22 but that it is immediately dropped. However, the service is added to OpenNMS.

The SSH detector should go beyond just a port check to test to see if there is, at a minimum, an SSH header. It should also exit cleanly as to avoid spurious SSH logs on the host device.

Workaround:

Modify the foreign source to use the TCP detector with a parameter of "banner" and a value of "SSH".