while looking for a configuration interface, i found some unusual ports in this device. (from LAN)
Host is up (0.0072s latency). Not shown: 996 closed ports PORT STATE SERVICE 53/tcp open domain 80/tcp open http 5000/tcp open upnp 8200/tcp open trivnet1
Why is port 8200 open and what is it for? Is it open on WAN interface too?
This is just a guess, but it could be related to the Ready DLNA Media Server. The public version of ReadyMedia uses port 8200. Try disabling the Media Server on the router and see if the port closes.
