Network filtering toolkit

Implementing many kinds of network filtering applications is easier with NetFilter SDK and ProtocolFilters:
- Parental control
- Traffic shapers/monitors
- Ad blocking
- Filtering email spam
- Redirecting TCP/UDP to local or remote proxy
- Decoding and filtering TCP connections protected with SSL
- Parsing SSL, HTTP, POP3, SMTP, FTP, ICQ, XMPP, NNTP and other protocols
- Other software that requires filtering TCP/UDP
It is possible to use the components from C/C++/Delphi/.NET code

Try the demo »

NetFilter SDK

NetFilter SDK is a framework for transparent filtering the data packets transmitted via network on Windows. This is a high performance proxy-less solution, compatible with antiviruses/firewalls/other network filters.

System requirements:
Windows XP/2003/2008/2012/Vista/7/8/10, x86/x64.


ProtocolFilters is a library that classifies data packets provided on input, detects high-level protocols and allows filtering the classified objects. It is designed to work with NetFilter SDK API, but also can be used for parsing and filtering the network packets obtained from other sources.

System requirements:
Windows XP/2003/2008/2012/Vista/7/8/10, x86/x64.