Minecraft Debian Firewall port forwarding

[Yeah0i]

OS Name/Version: Debian 12

Product Name/Version: 2.6.0.10 - 20250130.2

Problem Description:

Iam trying to open my port of my minecraft server. I opened it allready on my router but when iam conntecing to my server Minecraft telling me the conntection is refused.
The firewall iam using on linux is UFW

root@nuc:~# ufw status 
Status: active

To                         Action      From
--                         ------      ----
OpenSSH                    ALLOW       Anywhere                  
9090/tcp                   ALLOW       Anywhere                  
25565/tcp                  ALLOW       Anywhere                   # AMP:Minecraft01:MinecraftModule.Minecraft.PortNumber
2223/tcp                   ALLOW       Anywhere                   # AMP:ADS01:FileManagerPlugin.SFTP.SFTPPortNumber
12820/udp                  ALLOW       Anywhere                   # AMP:ADS01:ADSModule.Network.MetricsServerPort
8080/tcp                   ALLOW       Anywhere                   # AMP:ADS01:Core.Webserver.Port
25565/udp                  ALLOW       Anywhere                   # AMP:Minecraft01:MinecraftModule.Minecraft.PortNumber
2/tcp                      ALLOW       Anywhere                  
22                         ALLOW       Anywhere                  
10000                      ALLOW       Anywhere                  
2225/tcp                   ALLOW       Anywhere                   # AMP:Sky01:FileManagerPlugin.SFTP.SFTPPortNumber
25566/tcp                  ALLOW       Anywhere                   # AMP:Sky01:MinecraftModule.Minecraft.PortNumber
25566/udp                  ALLOW       Anywhere                   # AMP:Sky01:MinecraftModule.Minecraft.PortNumber
2226/tcp                   ALLOW       Anywhere                   # AMP:FTB201:FileManagerPlugin.SFTP.SFTPPortNumber
OpenSSH (v6)               ALLOW       Anywhere (v6)             
9090/tcp (v6)              ALLOW       Anywhere (v6)             
25565/tcp (v6)             ALLOW       Anywhere (v6)              # AMP:Minecraft01:MinecraftModule.Minecraft.PortNumber
2223/tcp (v6)              ALLOW       Anywhere (v6)              # AMP:ADS01:FileManagerPlugin.SFTP.SFTPPortNumber
12820/udp (v6)             ALLOW       Anywhere (v6)              # AMP:ADS01:ADSModule.Network.MetricsServerPort
8080/tcp (v6)              ALLOW       Anywhere (v6)              # AMP:ADS01:Core.Webserver.Port
25565/udp (v6)             ALLOW       Anywhere (v6)              # AMP:Minecraft01:MinecraftModule.Minecraft.PortNumber
2/tcp (v6)                 ALLOW       Anywhere (v6)             
22 (v6)                    ALLOW       Anywhere (v6)             
10000 (v6)                 ALLOW       Anywhere (v6)             
2225/tcp (v6)              ALLOW       Anywhere (v6)              # AMP:Sky01:FileManagerPlugin.SFTP.SFTPPortNumber
25566/tcp (v6)             ALLOW       Anywhere (v6)              # AMP:Sky01:MinecraftModule.Minecraft.PortNumber
25566/udp (v6)             ALLOW       Anywhere (v6)              # AMP:Sky01:MinecraftModule.Minecraft.PortNumber
2226/tcp (v6)              ALLOW       Anywhere (v6)              # AMP:FTB201:FileManagerPlugin.SFTP.SFTPPortNumber

My router is a AVM Fritzbox 7690

[Greelan]

One of your servers is using port 25566, but you’ve put 25567 in the port forward settings on your router

[Yeah0i]

found my problem my isp had a firewall on my ipv4. They disabled the firewall after a short call. and my ipv6 didn´t work because i didnt know that every device in my network got it own ipv6 adresse i thought they share the same ip adresse like a ipv4