Use a cascading or dual router portforward to connect your game server.
Use a cascading or dual router portforward to connect your game server.
I've been attempting this for some time without success. You have two distinct devices: an older ARRIS Surfboard SBG6580 acting as a modem, and a newer ASUS RT-AC1200 handling WiFi and the router. Previously, to run a Minecraft server, you'd switch Ethernet connections between the ASUS router and the ARRIS unit. For streaming or device use, you flipped the roles. Recently, you stopped this workaround and explored connecting your server directly to the ASUS. I tried a test on port 25565 for a Minecraft server, which appeared open when it was running. Friends tested it in games but couldn't connect. I checked DMZ settings, thinking that might be the solution, but I'm still unclear. You opened ARRIS configuration and set up 25565 on your ASUS's local IP via both TCP/UDP, while also configuring ASUS to listen on your local machine's IP for the same ports. Tools indicate port 25565 is open on canyouseeme.org, yet connections fail. Any advice? Thanks!
I'm not sure about the exact configuration, my brother did it some time ago and I'm unfamiliar with networking. Both devices are in the same room, and I think the ARRIS serves as the modem while the ASUS acts as a router. Should I simplify the setup and try connecting everything on one router—since it's the ASUS model—or should I replace it?
EDIT: NAPT has been turned off, and everything is working now. The wireless setting was already off, which made me think the router wasn't functioning, but NAPT also needed to be disabled.
Ensure SBG6580 operates in Bridged Mode when possible. This transmits the public IP to the ASUS router. Afterward, you can set up port forwarding on the ASUS just like with the ARRIS.