What is ipmenu ?
It's a user interface to Netfilter/iptables and Linux policy routing or traffic control, allowing you to edit firewall rules and configure the firewall to "mark" packets for policy routing or for class based queueing (CBQ). Netfilter is the Linux 2.4 subsystem for configuring a multi-homed Linux server as a packet filter or as a NAT (network address translation) device.