Can someon recommend Firewall software

I am setting up a Win. 2000 Server and want to know what the best Firewall software is?

Actually, I am getting 5 static IP's and could run them all through one machine which I guess wouldnt have to be Windows based and I could use this machine as the firewall for all the servers. Any suggestions on the most reliable method of setting this up and the recommended Firewall software for WebHosts?

Thanks

 

 

 

 

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