I got one of these units to play with also. Very powerful little boxes! I wanted to document a few things I've learned so far:
- I was unable to reset the Administrator password and successfully login even after doing a factory restore, not sure why exactly
- The "Service" port is Ethernet and is connected to an internal switch of some sort
- The second gigabit RTL chip is also connected to the internal switch
- There are other devices on the board with IPs 10.0.0.2 and 10.0.0.4 that try to open up connections to 10.0.0.1 on TCP ports 49348 and 49350
- Ubuntu treats HDMI1 as the first screen, HDMI2 as the second screen, and the TS port as a third screen by default
- The HDMI ports appear as "always connected" and seem limited to 1920x1080 only
- ESXi v6.7 works fine once you add the NET55_R8 package
- Cannot seem to change the boot device in the BIOS, it always resets itself back to the built-in SSD. Temporary changes work to boot from other devices though
- I managed to get macOS Mojave running, using the TS only - HDMI ports not functional (yet?)