Setting up MC Server, but getting lost connection and net is crashing

Hello, I’m trying to setup a Minecraft server for some friends to join.

I’m running into issues with setting it up. I was successful in setting up port forwarding (I think) my friend was able to join but I had some issues as you’ll see soon enough.

Let’s start

Background information.

I have a dual PC setup, Main PC and Second PC, Second PC will be running the server.

I'm from Ireland and I have Virgin Media as my internet provider.

Second PC IPv4 (248)

VM Hub > Advanced Setting > Security > Port forwarding (see image below)

https://i.imgur.com/J6aw8XY.png

So here it looks like I have successfully port forwarded.

Okay, now moving onto the MC Server, I have installed all the files needed and setup a run.bat file

https://i.imgur.com/VgF3Cpp.png

I am now running the bat file

https://i.imgur.com/Sx8XjUB.png

Okay, it’s done, and it should be working.

https://i.imgur.com/GPyxT9y.png

I joined the server and I break a block and I can’t pick up the Item.

https://i.imgur.com/LNUtA9M.png

And now I have lost connection.

Now I seem to have lost connection to my internet/ my router is down

https://i.imgur.com/GJQ6wCL.png

Once I type (stop) in the run.bat cmd, my internet comes back up.

So, I have no idea what’s up with this. I know setting it up isn’t as hard as it is right now for me.

Looking for any help you can give me.

Thanks