Dedicated Server

[Twentyafter]

I have recently updated the PC that I use for my dedicated server. This is a fresh Windows 11 install. Router ports are set up correctly.
I cannot see the server locally in game, but I can connect to it from outside my network. I fired up my phones hotspot and was able to connect to the server in game with no issues.
What am I doing wrong? Pulling my hair out.

[Huren Ogeko]

I am way rusty on this so I cant recall the setting name. But many times routes come with a setting on by default that restricts clients on the network from communicating directly with one another or seeing each other for security reasons. Especially if this is a wifi network. Because in a wifi network you dont always control over device that connects so routers will often come with a more conservative security approach given that 99% of the time clients on a residential wifi only really want to connect to the internet and back anyhow.

regardless for the reason you should see if you can find such a setting in your router that keeps wifi clients apart from one another.

the other possible thing to look at is the IP you are using. within your lan/wifi you are probably assigned a RFC 1918 IP (such as 192.168.x.x or 10.x.x.x or similar) but from the internet you would connect in via your public IP given to you by your ISP. So depending on where you are (same lan or across internet) you would use a different address to connect to the server.

That is the best advice I can give from a generic network perspective. I have zero actual experience in the games protocol and settings and any quarks it may have. I also assume you know how to and have successfully done port forwarding and/or setting up a dmz on your router as you seem to have said as much.

[Twentyafter]

Well, I got it working.
Both systems were hardwired to the router (Att Fiber) before the server upgrade.
After the server upgrade the server remained hardwired, but I had it plugged into the 1GB port of the router, which used to be the port my main system was connected to.
Prior to upgrading the server to my wife's old i7 9700K (I know, over kill), I had also decided to try and eliminate some of the cables in my office by running my main on wifi since my MB has wifi 6.
Reconnecting my main to the hardwire 1GB port on my router and the server to one of the other ports seems to be the fix, unless there was something else I did along the way.
Regardless, it's working again and it runs WAAAAAAAAAAAAAY better than it did on the even older 7th gen i3 I had it running on before.
Lesson learned, HARDWIRE IS ALWAYS BETTER!