Okay, interesting, the port is actually open now for some strange reason.
Dont ask me how i fixed it because i have no idea how, this just randomly started to work...

Now i need to test if someone can actually connect to the server without a error...

If I try to change my IP,like you changed it to canyouseeme.org,my server won't launch at all.Try using your server host,s IP,or if you are playing on the host computer,use the IP "localhost"(without the "s).I hope this helped!

Use this it works for everyone so far

There's a much easier way to see if the port is open.

Instead of directly connecting to your server, paste the ip and add it to your multiplayer server list. You will know if the port is open or not.

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Is there a way to FORCE open the port? Like smashing the router 5 times or something?

Don't use canyouseeme. The only way to properly test is to open outbound and have a program run to a server and then go inbound (think of sonar), but you typically don't have to do that with a third party program. Sites can't do this as it should be blocked by firewalls for the same sort of intrusions crackers can use on websites. This also means an OPENED port can look BLOCKED to a website. Don't make the mistake of bypassing that. Some could say that such information can also be passed to third parties with your IP attached which can get pretty messy.

canyouseeme.org should ONLY be used in the prevention of attacks than trying to get something to work. That's pretty much what you could sum what I just said as. There's a reason why "ShieldsUp!" isn't called "ShieldsDown!" port scanning.

The recommended way is to use your EXTERNAL IP and connect to the server using the Internet not through the local network internal IP (which isn't actually an IP Address at all, it looks similar to 192.168.*.*) and test it that way. Much more reliable and in turn safer without trying to get websites trying to scan your vulnerability where malicious attackers could be on the other end.

Use whatsmyip.org if you need to get your EXTERNAL IP.

Buy a new router

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Anyone?

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SamistineAlso try opening a different port and seeing if canyouseeme can see that port

Doesn`t work

Some routers have issues opening ports, also some ISPs block ports, try resetting your router to factory default settings and then retry port forwarding

Also try opening a different port and seeing if canyouseeme can see that port

This might sound stupid but since you didn't say you did it....Was the server on and running when you tested canyouseeme.org?