NetFilter SDK

If you are exploring your options as far as filtering outgoing TCP connections and believe the main characteristic of the solution you are looking for should be straightforwardness, NetFilter SDK could come in handy.

The developer toolkit should allow you to do just that without requiring you to redirect the connections to the proxy and without applying modifications to the network applications, on both 32-bit and 64-bit Windows OSes.

And since we have touched upon the subject, it should be pointed out that the SDK can handle development tasks related to the content filters, traffic shapers and analyzers, basic app level firewalls, and more.

Being split into two main section, NetFilter SDK comprises the kernel as well as the user mode, with the latter being capable of filtering both incoming and outgoing TCP connections as well as UDP diagrams.

The transparency of the filtering process refers to the fact that redirecting the traffic to proxy and changing the addresses should not be necessary while trying to view and modify TCP or UDP data Implicitly, no interferences with firewalls, antivirus, and other filters should take place.

Aside from that, it is worth pointing out that high-speed connections should raise no difficulty to the framework, considering that the driver operates between the apps and the TCP/IP stack and is overall easy to use.