Count all TCP connections for a given port

count_conns.sh

function count_conns() {
    if [[ $# -eq 0 ]]; then
        echo "Usage: $FUNCNAME <port>"
        return
    fi

    ss -t -n "src :$1" | awk '{print $5}' | sed 1d | sort | cut -d: -f1 | uniq -c | sort -k1,1nr -t. -k2,2n -k3,3n -k4,4n -k5,5n
}