NetDefender is described as 'Free and open source firewall for Windows 2000/XP' and is a Firewall in the security & privacy category. There are five alternatives to NetDefender for Windows, Android and iPhone. The best NetDefender alternative is Windows Firewall Notifier, which is both free and Open Source. Other great apps like NetDefender are ZoneAlarm Firewall, PC Tools Firewall Plus, NoRoot Firewall and Sygate Personal Firewall.
Windows Firewall Notifier (WFN) extends the default Windows embedded firewall behavior, allowing to visualize and handle incoming or outgoing connections.
Windows Firewall Notifier is the most popular Windows alternative to NetDefender.
Windows Firewall Notifier is the most popular Open Source & free alternative to NetDefender.
Provides two-way firewall protection by blocking unauthorized network access, detecting intrusions, hiding devices from threats, stopping viruses, spyware, and data theft, offering real-time alerts, customizable rules, and simple setup with light system impact.
ZoneAlarm Firewall is the most popular Android & iPhone alternative to NetDefender.
PC Tools Firewall Plus is a powerful free personal firewall for Windows® that protects your computer by preventing unauthorized users from gaining access to your computer through the Internet or a network.
Firewall WITHOUT ROOT. Host name/domain name filtering, simple interface, fine-grained access control and no suspicious permissions on the firewall app itself.
Sygate Personal Firewall is a bit old but good firewall for Windows. It uses very small amount of system resources and is quite robust.
The project is now abandoned because Symantec Corporation, on October 10, 2005, acquired Sygate Technologies, so Sygate Personal Firewall ha.
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