If you are looking for or need a software firewall, there a few choices when it comes to freeware.

Comodo Firewall Pro is the best free firewall i have tested. I has a nice set of features, the interface is good and has options for everyone. I read also that it has passed some standard tests before so it can protect you against know network attacks.

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• Comodo Firewall Pro 3.0.21.329
• Comodo Firewall Pro 3.0.15.277
• Comodo Firewall Pro 3.0.22.349
• Comodo Firewall Pro 3.0.24.368
• Backup Your Data With Comodo Backup