Natas v3.00.01 beta is an advanced network packet capturing and analysis programm designed for Windows 2000 which works with the new winsock v2.2. Features the ability to filter traffic by address and port, log packets, parse out passwords, and requires no driver. Includes source and binary.
You can download it from the following link: https://packetstormsecurity.com/files/download/23512/natas.zip
Source: https://packetstormsecurity.com/files/23512/natas.zip.html