Server/client suite which provides per-user access control/firewall/QOS. Robust and high speed implementation is secure against MAC/IP spoofing, and can scale to large networks with many clients. Options for additional monitoring and captive portal.
Network tool for monitoring IPv4 activity. Iptraf, tcpdump, trafshow have not such ability. Gives sorted traffic load speed on each IP. Helps detect the channel overload and maybe sources of attacks. Requeres ULOG target of iptables.