Not to butt in. Web. Would you please download and install this application. It will show every device on your network. If your receiver is connected to the router, it should show in the list.
It will also the MAC address of your receiver if it's listed in the discovery list.
Port 80 is always open in a router for outgoing requests.
In your receiver can you see if there is a network test function?
And verify if the network settings are set to DHCP. Maybe called Automatic configuration.
You confused me when you mentioned SSID. That's only for wifi.
Also a hint of what your router is set to, to "hand out" IP addrresses.
Something like in the LAN settings, IP range. DHCP scope.
Look for something like 192.168.1.2 to 192.168.1.254.
Another thing to try if IF you determine the receiver's IP address. In the router you can assign it as a DMZ....or wide-open visibility on a network. That would be in the WAN settings usually.
Hope you can at least verify youre getting network connectivity on the receiver.
Look here. Get the right version for your PC. Its under Feedback.
Turn on computers on your local area network by sending Wake-on-LAN packets
www.nirsoft.net