- http://shorewall.net/Accounting.html
- https://github.com/ntop/ntopng
- https://blog.vortorus.net/2009/04/05/monitoring-traffic-with-munin-and-shorewall/
- https://collectd.org/wiki/index.php/Plugin:IPTables
- https://unix.stackexchange.com/questions/41765/traffic-stats-per-network-port
- https://github.com/collectd
- https://github.com/ipfire/ipfire-2.x/blob/master/src/squid-accounting/acct.pl
- https://github.com/jiehanzheng/squid2radius
- Accounting using iptables
- Accounting using ntopng
- Accounting using radius