IPNetTuner is a simple application that allows you to optimize your Mac OS.
BrothersoftEditor: IPNetTuner is a simple application that allows you to optimize your Mac's Internet performance. IPNetTuner supports over 30 adjustable parameters including the TCP Window Size, Time Out intervals, Maximum Segment Size, and MTU. It also provides a convenient test tool so that you can immediately see the results after adjusting specific parameters (or opening one of our preconfigured tune up documents). Users typically report speed increases of between 10 - 50% using IPNetTuner.
Why might you need IPNetTuner? Open Transport's Default settings must enable connections for both slow analog modems as well as very high-speed ethernet connections. As such, these default settings are not optimized for either type of connection (although they do let both types of connections to work). To get the most out of a specific type of connection you really want to setup Open Transport so that its internal settings best match that of your network connection. This is where IPNetTuner comes in....to assist you in tweaking these Open Transport settings.