The NVR's MAC is registered with Static DHCP in the router. It pulls .10 every time. So in effect, is a static IP. However perhaps not as helpful for these kinds of diagnostics where it becomes DHCP reliant. Yes you are correct, 10.60.3.0/24 is the subnet used here at home.
10.60.3.10 is fully responsive, ping, web GUI, SADP, etc. as if its fully functional. I just have no way to login. When I first upgraded, yes, it did prompt me to enter a new password. However, there was no usernames in the user list to assign a new password to, so I could never get past this screen.
While it is a US-regioned NVR and I pulled the FW from the European site, the Web GUI took it gracefully. Besides,
TFTP throws the same error when trying to restore the 3.1.5 US firmware. So that rules out language flags since it failed for US and non-US. I've done this with 2032 and 2132 cams many times before and it works great. It'll take both chinese and US FW via TFTP. never threw a fit. However this NVR is a different story. Won't accept anything.