one of the best firewall ever is the COMODO Firewall Pro

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its the best Internet Firewall ever, beats any other popular firewall. I downloaded it and installed it and tested it in www.pcflank.com and it works, blocks and stealth all incoming connection so that no hacker,virus,malware etc can access your computer. I recommend it to you all internet surfers. Its free and I a sure you and you're computer are safe and secure. Believe me i Tested it and i'am using it now. you can download it. here's the link: www.comodo.com