I configured a new Ubuntu Installation and set up the firewall. All incoming was denied and all outgoing was denied as well(with exception for port 8080, as I am behind a proxy). I then tried an online port scan and found that my ssh port(22) was open. I double checked but the problem remained. I specifically denied port 22 in the firewall, but the port is still shown as open(all other ports are closed). What is the reason behind this?
Output of netstat -tlpn
is
tcp 0 0 127.0.1.1:53 0.0.0.0:* LISTEN -
tcp 0 0 127.0.0.1:631 0.0.0.0:* LISTEN -
tcp6 0 0 ::1:631 :::* LISTEN -
netstat -tlpn
to your question..nmap