Demo version of NetFilter SDK 2.

Demonstrates the filtering of raw TCP/UDP packets.

The demo driver filters no more than 1000000 TCP connections and UDP sockets.
After exceeding this limit the filtering continues again after system reboot.

Download Altenative link
build: 1.6.8.5 [changelog]

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Demo version of NetFilter SDK 2 + ProtocolFilters.

Demonstrates the filtering of high level protocols like SSL, HTTP, FTP, POP3, SMTP etc.

The demo driver and ProtocolFilters.dll filter no more than 1000000 TCP connections and UDP sockets.
After exceeding this limit the filtering continues again after system reboot.

Download Altenative link
NetFilterSDK build: 1.6.8.5 [changelog]
ProtocolFilters build: 1.3.2.5 [changelog]

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The instructions for ordering a license for full version or source code:
http://www.netfiltersdk.com/buy_now.html

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Source code of NetFilter SDK for Linux and Mac OS.

Download Altenative link
build: 1.0.3.0 [changelog]

If your browser blocks the downloaded file:

- Download a suitable build of curl utility here. It is possible to bypass this step on Windows 10/11, because it includes curl as a default component since build 17063 of Windows 10.
- Use the following command to download the package:
curl --output package.zip <package file URL>