#!/usr/bin/env bash

# Listening external ports and their process owner

ss -Htulpn state listening '! src 127.0.0.1/8 and ! src [::1]' \
    | awk '{
        port = $4; sub(/.*:/, "", port)
        proc = "unknown"
        if (match($0, /"[^"]+"/)) proc = substr($0, RSTART + 1, RLENGTH - 2)
        print port, proc
    }' \
    | sort -n -u -k1,1 \
    | awk '{ printf "%s%s (%s)", sep, $1, $2; sep = ", " } END { print "" }'