Hmm, in the meantime firewall driver interface is not open for public. However I understand your requirements and if you are a licensed user then please send an e-mail to support(at)ntkernel.com. I don’t see any objections to open firewall interface to licensed users. Please note that firewall API is a C++ DLL which is a wrapper around driver I/O control codes. You should be able to use it from managed C++ (if make C style wrappers then from any environment which support calling functions from C DLL).