ipfwThrottleBody is described as 'What is ipfwThrottleBody? (formerly ipfwSingleThrottle)
ipfwThrottleBody is a Mac OS X AppleScript written to allow you to limit or throttle network bandwidth on your network interface (whether it be WAN or LAN). This program utilizes the ipfw shell command already implemented wi' and is an app in the network & admin category. There are 2 alternatives to ipfwThrottleBody for a variety of platforms, including Linux, VirtualBox, Self-Hosted, VMware vSphere Hypervisor and Microsoft Hyper-V Server apps. The best ipfwThrottleBody alternative is CacheGuard Gateway, which is both free and Open Source.