After upgrade Musicbox my java serverprogram listening on port 8000 is not reachable

Pi MusicBox
1

I’m using Musicbox for al while now with now problems
I’ve a small local java program to communicate with my domotica system.

ServerSocket s= new ServerSocket(8000);
while (true) {
  Socket remote = s.accept();
  System.out.println("Connection, sending data.");
 ....

}
Now I’ve upgaded the musicbox (installed a new SD card, installed java compiled my program and run it.
but it is not possible receive connections from my computer or domotica system.

netstat -t -l -n gives me:
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:6680 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:445 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:5000 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:139 0.0.0.0:* LISTEN
tcp6 0 0 :::22 :::* LISTEN
tcp6 0 0 :::445 :::* LISTEN
tcp6 0 0 :::8000 :::* LISTEN
tcp6 0 0 0.0.0.0:6600 :::* LISTEN
tcp6 0 0 :::5000 :::* LISTEN
tcp6 0 0 :::139 :::* LISTEN

is there a firewall added, or somthing else that bloks access to it?

thanks
Wim

2

The firewall has always been there and it did receive some changes, but I am sure that port 8000 has always been blocked. You can see the old v0.6 firewall exemptions below do not include port 8000, so I think you must have either added it manually or disabled the firewall:

It’s trivial to add an exception, just add it to this file.

3

Yep it is solved.It was the firewall.

can’t remember I had to do it in the past.