I just received and installed this router for myself today. This is what I had to do to get my Minecraft server working on this router.
1. Add your Minecraft server to the Fixed DHCP Clients list. (LAN Setup > DHCP)
2. Add a Virtual Server for the Fixed local IP Address with port range 25564 to 25566. (Firewall > Virtual Server)
3. Disconnect and Reconnect the server to the router to refresh the IP Address given.
4. To access the server on computers using the same router as the server, use the local IP Address (like: 192.168.0.3)
To access the server on computers outside the network, use the assigned DHCP IP Address (found on WAN Setup page)
0
http://www.minecraftforum.net/topic/1600391-how-do-i-port-forward-my-server-on-arris-dg860/#entry23125728
2
1. Add your Minecraft server to the Fixed DHCP Clients list. (LAN Setup > DHCP)
2. Add a Virtual Server for the Fixed local IP Address with port range 25564 to 25566. (Firewall > Virtual Server)
3. Disconnect and Reconnect the server to the router to refresh the IP Address given.
4. To access the server on computers using the same router as the server, use the local IP Address (like: 192.168.0.3)
To access the server on computers outside the network, use the assigned DHCP IP Address (found on WAN Setup page)
See my word document detailing all the steps here: http://adf.ly/RJMVe