Forum posts for aim.exe

How do you block selected applications from accessing the internet (C++, Win32)

I want to have an application or service that is running that, on some schedule, can disable access to the internet for all applications except for specific ones.

I'm trying to create a filter that can be turned on or off under programmatic control. Not just IP addresses and ports, but I want to be able to block specific applications as well, much like Zone Alarm and other software firewalls let you block.

For example, iexplore.exe, skype.exe, firefox.exe, aim.exe. But still need to allow other applications to connect as needed.

It has to work on Vista as well as XP, but I kind of expect that the method will be different on each of those platforms.

Basically, the filter has to tie the network communication back to the executable that is making the request and then allow or deny it.

Update:

On Vista at least, it looks like I want to use filters in the ALE layers of the WFP.

On XP, I'm still looking for the best way to do it. Do I really need to be writing device drivers and dealing with kernel stuff? I'm just a lowly application developer. Kill me now.

Update 2:

Currently looking at the PfCreateInterface and related Pf* API's for pre-Vista systems.

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How do you block selected applications from accessing the internet (C++, Win32)