tc.sh

#!/usr/bin/env bash

set -v

# initial setup
tc qdisc del dev eth0 root                          # clear eth0
tc qdisc add dev eth0 root handle 2 htb default 1   # set default class

traffic_acct.sh

iptables -N TRAFFIC_ACCT
iptables -I INPUT -j TRAFFIC_ACCT # or FORWARD

iptables -A TRAFFIC_ACCT -p tcp
iptables -A TRAFFIC_ACCT -p udp
iptables -A TRAFFIC_ACCT -p icmp

# view
iptables -L TRAFFIC_ACCT -n -v -x

# iptables -Z TRAFFIC_ACCT # Zero out counters
# iptables -F TRAFFIC_ACCT # Remove all rules for chain