A Windows XP compatible version of Sygate is out. Thanks AzuKa.
Sygate® Home Network 4.2Read more
Build 803
If using Sygate® Personal Firewall with this build, you must use Sygate® Personal Firewall 4.x.
The latest release version of Sygate Home Network is now available. Download this version with several new features, including:
Windows XP support
Increased Performance on Windows NT/2000/XP
Single network interface card networking
New intuitive user interface
Integrated Basic Firewall
Access Rule Editor