Connections
netstat -an
Display all active network connections with numeric addresses.
Explanation
Netstat -an shows connections and listening ports using numeric addresses. It is useful when DNS lookups slow down output or when you need exact IP and port values.
Syntax
netstat -an
Show numeric connections
TCP 0.0.0.0:80 0.0.0.0:0 LISTENING TCP 192.168.0.27:5050 142.250.190.14:443 ESTABLISHED
Look for unexpected listening services or blocked ports.