Hi,
Apologies for the long post however I've tried to give as much detail as possible.
My daughter has a Minecraft server which has been setup for years using port forwarding for the server and also for voice chat. We moved from BT to EE and set the relevant forwarding up for the server and the voice chat however whilst the server has no issues we're unable to get the voice chat to work.
We have tried changing the port however no matter what we select our testing returns that the port must be closed. This is despite everything on the router looking as it should. Whilst I'm fine setting up the forwarding etc I don't know as much as my daughter therefore I've had her send me (see below text) info regarding what she's done and how she has determined that it's the router/port that's the issue:
Hello I am currently having difficulty forwarding a port. I run a Minecraft server which is accessible to people outside my network on an ubuntu machine, however, recently I have been trying to get simple voice chat working which requires another separate open port. I tried to open the needed port from my router but it is still not open.
You may wonder how I know it is the port and not something I am doing. To determine this I went onto my ubuntu machine and did a tcpdump for the port I knew was open, and then used my phone on 4g to send udp packets to the public IP. This worked fine and I could see the packets coming in. I then tried the same with the port I didn't know if was open and I could not receive any packets.
I also did another test where instead of connecting to my minecraft server from the public ip with ddns, I connected with the private ip, when I did this voice chat was working. As well as obviously I could see packets through tcpdump. It's just external users that can't use voice chat. I'm not really sure what to do now since I've added the rule on my router but it's clearly not open.
In addition we have also tried following the relevant steps of turning off upnp and adding the port range back in. Have also tried different number ranges rather than the default 24454/udp.
Not sure if this is relevant/helpful. I had also read elsewhere that there's a brief handshake with tcp before routing voice over 24454/udp. As such I tried setting up the port over udp/tcp rather than just udp however when putting the range into internal the external port range turned red. From what I understand this occurs when there's an overlap however there's no other port forwarding with this range (or close to it).
Smart Hub 7 Pro - Version 3.14.5
Any help would be greatly appreciated
