Hi,
The firmware version has been all of them up to 211 the latest and greatest. The hardware version is A1. Region not sure what you are asking.
I've tried different combinations of APPLICATION RULES, CUSTOM SERVICES, and FIREWALL RULES. Still, only the number 1 in the firewall rules will open the port. The firewall rules will only open one IP address. I don't believe that the DSR-250 has a VIRTUAL SERVER. Of course I could be wrong.
Still at a total loss as to why one and only one port can be opened.