ss

Utility to investigate sockets. More information: https://manned.org/ss.8.

ss -a -t|-u|-w|-x

ss state/exclude bucket/big/connected/synchronized/...

ss -t src :443

ss -lt src :8080

ss -pt dst :ssh

ss -u 'sport == :source_port and dport == :destination_port'

ss -4t src 192.168/16

ss --kill dst 192.168.1.17 dport = 8080