Cannot decide between ethernet or wireless connection

[jakobsn]

The probe monitor cannot decide whether the probes are connected by ethernet or wifi.

[frestr]

This happens when an SSH connection is established between the server and the probe, but the server is unable to execute any commands on the probe. It usually happens when the probe abruptly disconnects (e.g. from power loss, or if the probe temporarily takes down the wifi for testing purposes), which will make a "dangling" connection.

The server's sshconfig can be changed to make the server close idle connections after a period of time (I think we already did this on the UNINETT server, but perhaps it didn't work as intended).