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21.7 Legacy Series / Re: Port forwards for an old game server - simple task but can't make it work
« on: September 27, 2021, 11:36:22 pm »
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!
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!