Media server, LAN address 192.168.0.100, port address 5000 WAN address 188.8.131.52. LAN subnet 192.168.0.0/24 Port forwarding rules map access to 184.108.40.206:5000 to 192.168.0.100 . Media server is accessible and works tickety-boo remotely. Pointing media player remotely to 220.127.116.11:5000 works perfectly. HOWEVER! Attempting to access 18.104.22.168:5000 whilst connected to the LAN fails. The WAN interfaces can be pinged, but it seems port forwarding rules are not applied when "backrouting" though the local interface. I know there is a term for this routing ability, but I can't for the life of me remember what this routing behavior actually IS.. Can I be enlightened?