Device Security Analysis: the greenhouse controller

A six year old control device, an account called admin, and eleven failed logins from six different addresses.

This is the set where blocking the attacker's IP is the wrong reflex, because there is no single one. The device also ends up listening on a port nobody approved, which only Source 5 reveals, so this is the set that rewards reading the listening services rather than skimming past them.

Part C is a private key that every account on the device can read. Work out what that is worth to an attacker before you look at the sample.

This one is self-scored. Nothing you write is collected, sent or stored, and no score reaches a gradebook.