Is there any change you can isolate wifi traffic between the wifi clients for this (DSR-250N) specific router?
I have a wifi client (app) that can't open a wifi (ZEBRA printer) port, getting timeouts. When i use a wired PC (connected to the DSR-250N) i can open the port without any problems. So it seems clients in the same AP/SSID can't see each other.
I don't have access to this router, but i would help me greatly if could point my customer in the right direction.