i dont know what i messed up when setting up server
So i used ipconfig and found my ipv4
port forwarded to a port with that ipv4
now when i try joining with the ipv4 that i get when looking up my ip i cant join (and yes i did ":myport")
20 Replies
!cgnat
We may have bad news for you :C
You may be under a CGNAT which is a method that ISP's use to conserve IPV4 IP's due to how limited they are now. What this means in plain terms is that your IP address is being shared with other people as your router goes to the ISP's router, by default this means port forwarding doesn't work.
We need to check if you are under a CGNAT and we got 2 options.
Option 1: commands
Depending on your OS, run the following command:
- Windows:
iex (Invoke-RestMethod -Uri "https://raw.githubusercontent.com/DominicTWHV/Is-It-CGNAT/refs/heads/main/windows.ps1")
- Linux: curl -s https://raw.githubusercontent.com/DominicTWHV/Is-It-CGNAT/refs/heads/main/linux.sh | bash
-# You should never run such things without reviewing and understanding the code
Option 2: manually
Open your router's configuration interface. Somewhere, you'll see something like 'external' or 'public' IP.
If your external IP is in one of the following ranges, you're basically screwed as long as port forwards go:
- 10.0.0.0/8
- 172.16.0.0/20
- 192.168.0.0/16
- 100.64.0.0/10
- any IPv6 address/range - This shouldn't be a problem, but Minecraft's IPv6 support is still rather quirky. You're at your own, but we're happy if you share your experience.
What do I do now?
You should ask your ISP for a public and IPv4 address (but this may cost you money).
NB: your internal IP should and most probably will be in one of the first three ranges, don't mix them upcheck this^^
so this is not good?
ive hosted servers before tho
like literally a month ago i was hosting one without issue
you're looking in the wrong spot
are you connected to the same network that the server is on?
yeah, so aside from that, I’d make sure there’s no firewall issues. can another pc on your network connect to the server using the server’s local ip?
no
you can temporarily disable windows firewall (or ufw/firewalld for linux) and see if that allows you to connect locally
trying that now
server doesnt show
if there’s no firewall and a local machine can’t connect to another local machine, then you’re either typing the ip address wrong, your router has weird isolation, or the devices are on different networks
is it because im remoted in through the windows remote desktop?
its like the port isnt opening even tho its port forwarded?
im doing this right arent I?
Yeah I have no idea
Every port I try to open isn’t open
oh wait
is it cause my laptop and pc are on a shared switch?
are you trying to run minecraft on port 69?
i got it working by taking my computer off ethernet and switching to the default port
yeah port 69 won't work
you need to use a port larger than 8192
i was having issues using 38496 tho so im gonna guess taking it off ethernet is what fixed it