List all listening ports¶
In order to show all listening ports on a linux device run
sudo netstat -tunlp
Netstat can be installed on debian by running
sudo apt install net-tools
Beispiel output:¶
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 802/sshd: /usr/sbin
tcp6 0 0 :::22 :::* LISTEN 802/sshd: /usr/sbin
udp 0 0 0.0.0.0:68 0.0.0.0:* 590/dhclient
The IP addresses 0.0.0.0 and :: are the IPv4 and IPv6 placeholders for “listen on all IP addresses”