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I wanted to add a post for anyone who may read this thread while troubleshooting something similar.

While I haven't tested to see if this is solved I think I found the problem.

I did not realise that with my ISP I am behind carrier grade NAT. For beginners like me the way you can tell whether you are behind cg-nat or not is to check your IP address (ipv4 for me) in the router and then check your public IP address (Google what's my ip or similar). If they are different you may be behind cg-nat and despite your best efforts you may have trouble hosting things like old game servers. Fortunately I can call my ISP and opt out of cg-nat which I will do when their customer service is open later today.

Anyway, just an important thing to check in troubleshooting that I had overlooked. IPv6 is I guess the long term solution and my ISP are great in offering early support for it but I'm not sure IPv6 will help me host a 2004 era ipv4 game server!

Thanks very much for looking at the settings. I haven't tried logging yet but it's great to know there's nothing glaringly wrong with my setup as I wasn't sure if I'd done it right.

I can move on to troubleshooting the client and the application then and see if logging gives any insights.

There are so many gremlins trying to get old software like this to work so it might be a few things....

Hi, thanks for the reply. Yep, I applied and saved as I went.

Hello all

I am trying to host an old game server (UT2004) to play with a few friends but I cannot get the port forwarding to work. The game server needs UDP ports 7777, 7778, 7787 and TCP port 28902. I have researched this thoroughly and set it up as best I can but I am a beginner (relatively) and I am struggling to understand why it won't work.

I believe my interfaces are simple. I have 1xLAN and 1xWAN interface. I am using IPV6 and IPV4. WAN is by DHCPV4 and DHCPV6. The IPV6 WAN is track interface with the LAN DHCPV6 server also running. The IPV4 LAN is just 192.168.1.0/24, no other subnets, VLANS or anything else. I am also running the UPNP plugin.

I have made no changes to the default firewall rules.

I wish to forward traffic to a LAN PC which is 192.168.1.6. My port forward rule and aliases are in the attached screenshots of the same name. I enabled "reflection for port forwards" and "automatic outbound NAT reflection". When creating the port forward rule I chose the "add associated filter rule" option and there is a linked rule present in the firewall WAN rules.

However, my game server is unreachable, nobody can connect.

Did I misconfigure something? Can I provide any other information that would help determine what is wrong?

I would be very grateful for any help or suggestions.