Firewalls Comparisons

Firewall and price*	Latest version	System requirements	Firewall features
Comparison Chart - Firewalls
ZoneAlarm Pro 7.0 Where to Buy (*est. $35)	7.0	Windows 2000 /XP. Pentium III 450 MHz or higher. 50 MB of available hard disk space. Minimum system RAM: 128 MB. Will not run under Windows Vista.	Firewall, popup ad blocker, identity theft protection, e-mail screening, spy site blocking, privacy protection, game mode. Can automatically configure firewall to allow popular programs to access the Internet. Leak test protection. Bundled anti-spyware application.
Outpost Firewall Pro 6.0 Where to Buy (*est. $40)	6.0.2225.232.465.287 (aka 2008)	Windows 2000 SP4, XP, Server 2003, Vista. 450 MHz Intel Pentium or equivalent. 100 MB of available hard disk space.256 MB RAM.	Firewall with spyware blocking and protection against identity theft and network attacks. Automatically configures and learns user behaviors. Quarantines dangerous e-mail attachments. Protects itself against disabling attempts. Can optionally block access to potentially malicious or unwanted websites based on a predefined list of URLs. Blocks ads.
Online Armor Personal Firewall v2 Where to Buy Free download: http://www.tallemu.com/	2.0	Windows NT/2000/XP Will not run under Windows Vista.	Firewall with auto-run control. Detects key-loggers. Prevents tampering.
Comodo Firewall Pro 3.0 Where to Buy Free download: http://www.personalfirewall.comodo.com/	3.0	Windows XP (SP2) 32- and 64 bit, Vista 32- and 64 bit. 64 MB available RAM. 35 MB of available hard disk space (55 MB for 64-bit versions).	Firewall secures against internal and external attacks. Leak test protection. Blocks Internet access to Trojans. Protects against identity theft. Integrates with Windows security center. Basic and host intrusion prevention system modes. Has training mode. Automatically updates. Prevents self-termination.