I did change it:
netstat -an |grep LISTEN
tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:443 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:60623 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:42131 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN
tcp6 0 0 :::46575 :::* LISTEN
tcp6 0 0 :::111 :::* LISTEN
tcp6 0 0 :::56625 :::* LISTEN
tcp6 0 0 :::22 :::* LISTEN
But there ist still no open port.
When I try to connect with telnet it does not work as well.
Trying 127.0.0.1...
telnet: Unable to connect to remote host: Connection refused