Linux Network

IP addresses

List all interfaces with IPs

ip a

show

ip route show

show ipv6

ip -6 route show

Trace route ipv4

traceroute google.com

Trace route ipv6

traceroute -6 google.com

See listening ports

ss -l
netstat -ntlp

Check if port is open from another machine

nc -zv 192.168.1.1 80

See current iptables rules

sudo iptables-save

See current nftables rules

sudo nft list ruleset