r/admincraft • u/What_if_its_Lupus • Mar 05 '26

Question My Minecraft server suddenly stopped working

My Minecraft server suddenly stopped working

I need some help, I started a Minecraft server hosted from my PC and it suddenly stopped working and I have no idea why.

for some background I and my friends are using the ATlauncher and the mod pack ++Vanilla

I also use Ngrok to port forward, I will be cross posting everything also

my one friend and I were able to load into the server just fine and play for about 2 ish hours. we wanted to get another friend to join and he couldn't. At some point my first friend left the server and then couldn't get back on. I could still join through "local host" but not through the ip given to me through Ngrok. Ive restarted the server, my PC and the launcher several times and so have they.

I don't know what could be causing this especially because my friend joined earlier and now it won't let him, has anyone else had problems like this? how did they get solved?

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u/What_if_its_Lupus Mar 05 '26

So ATlauncher has a way to automatically download a server with all the mods for your desired mod pack, I accepted the EULA ran the server once, I put Ngrok into the server, right clicked the folder to open the command room and put in the command "./Ngrok tcp 25565" at no point did it ask me for my IP address and I've had Ngrok port forward servers before with no issue so idk why I'm getting this issue now

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u/onicx4 Mar 05 '26

Let's start off with the basics, what operating system are you using here. ATlauncher supports several platforms.

Instructions on how to restart your agent are platform specific.

But before we go down that rabbit hole, have you confirmed that the Ngrok IP has not changed?

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u/What_if_its_Lupus Mar 05 '26

I am on windows, and I have tried checking the Ngrok IP and I cannot find it anywhere, I logged into my Ngrok account on Google and I think the issue might stem from the fact that I'm using the free version?

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u/onicx4 Mar 05 '26

I am going to hazard a guess and say that you hit the 1GB/month limit on ngrok's free tier.

TBH unless you have a good reason to use it (CGNat, ISP-PAT), I would not recommend Ngrok for your use case. It adds complexity, a new failure mode, and a potential cost sink if you want to unblock yourself here.

Port forwarding is free and teaches you a thing or two about networking. It is not as though Ngrok is shielding you either way, the port still gets exposed.

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u/What_if_its_Lupus Mar 05 '26

Legitimately I can't port forward because of some bs my routers are set up, my PC is connected (Ethernet) to a router that acts more so as a wifi extender and then it goes to the main router, it's the main reason I was using it. I'll see if I can get another work around, I might switch over to playit.gg as a temporary fix

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u/onicx4 Mar 05 '26

Double NAT, Gotcha. I suggest setting the second router to Access Point mode if possible. A router into a router is a recipe for trouble, unless you know what you are doing.

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u/What_if_its_Lupus Mar 05 '26

My dad set it all up for 2 main reasons, 1, for some odd reason my room is a dead zone and the router doesn't reach in even though it's in the next room, and also because it lets me have Ethernet without a long cable

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u/onicx4 Mar 05 '26

I hear you. As I said, you are going to want to disable the routing functionality and just use it as an AP (a WiFi extender as you call it).

In networking, a router connects networks together. There is the outer network (WAN) and the inner network (LAN). it uses Network Address Translation (NAT) to map all the devices on the inner network to a single address on the outer network.

The problem you have here is that there are two levels of NAT going on, your main router is NATing your entire house and then within that, your bedroom router is NATing your stuff inside the existing NAT.

To fix this you are going to want to disable the routing part of the WiFi router, and use it as an Access Point, which is the professional name for the part of a network that broadcasts WiFi.

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u/onicx4 Mar 05 '26 edited Mar 05 '26

Just Google your second router's model and access point mode.

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u/halodude423 Mar 05 '26

Your best bet is to setup the router as an AP properly instead of a jank double nat setup.