Trying to port forward

[Yoyolight]

Hi,

I'm trying to port forward a old computer which has freenas installed. I've successfully created a minecraft server which i can connect to though my local ip, but now i'm stuck at port forwarding the ip of the old computer so i can play with my friends. I I've tried to port forward the 25565 port, i have the good ip and the it is on, but it still doesn't work.

Did i do something wrong?

 

[Levent]

• Operating system firewall configured properly?
• By "good ip" you mean your ISP doesnt have cgnat? that alone doesnt mean they allow port forwarding.

[Eigenvektor]

31 minutes ago, Yoyolight said:

forwarding the ip of the old computer so i can play with my friends.

That's not how port forwarding works. You don't forward an IP, you forward a connection on one (external) IP address and port to another (internal) IP address and port. This means your friend needs to connect to that port on your external IP, your internal IP doesn't matter to them.

 

If someone makes a connection to your public/external IP address on port 25565 that connection is forwarded to the computer with the IP 192.168.8.110. This requires that your ISP isn't blocking connections to that port on your external IP and your computer isn't blocking connections to that port on your internal IP.

[Yoyolight]

14 minutes ago, Eigenvektor said:

That's not how port forwarding works. You don't forward an IP, you forward a connection on one (external) IP address and port to another (internal) IP address and port. This means your friend needs to connect to that port on your external IP, your internal IP doesn't matter to them.

 

If someone makes a connection to your public/external IP address on port 25565 that connection is forwarded to the computer with the IP 192.168.8.110. This requires that your ISP isn't blocking connections to that port on your external IP and your computer isn't blocking connections to that port on your internal IP.

I know, i gave them my public ip with :25565 at the end, but still there was no connection

 

[Eigenvektor]

2 minutes ago, Yoyolight said:

I know, i gave them my public ip with :25565 at the end, but still there was no connection

on.

You can use a tool like https://www.yougetsignal.com/tools/open-ports/ to test whether that port is shown as open to the outside world. It should auto-detect your external IP, just enter the port number and click on Check.

 

If the port is shown as closed, then either your ISP is blocking connections to that port, forwarding isn't work properly or your computer's firewall is blocking connections to that port (from some IPs)

[Yoyolight]

Is there a way i can find a port that is working, cause i just found out port 21 23 25 and 80 aren't working. or is there a way to let my ISP unblock the 25565 port?

[Eigenvektor]

21 minutes ago, Yoyolight said:

Is there a way i can find a port that is working, cause i just found out port 21 23 25 and 80 aren't working. or is there a way to let my ISP unblock the 25565 port?

I'd first make sure this isn't a firewall issue on the PC running Minecraft. Also, forwarding a port on its own will not show it as open unless you have a service at the other end listening on that port. So you'd need to e.g. start a web server on port 80, to see it as open after you've forwarded it.

 

Other than that, you can certainly contact your ISP, ask whether they are blocking incoming connections. If so, you can ask whether they are willing to unblock them for you. Some ISPs block ports by default to protect their customers and will unblock them if asked. Others block ports because they don't want private customers to run servers and will possibly ask you to switch to a commercial contract otherwise. So it depends on your ISP and what their policy is.