[RESOLVED] Recommendations for a hardware firewall

What would you recommend for a hardware firewall? and why?

I have a WinNT Workstation running iPlanet and a GIS Internet Map Server (ArcIMS) application. I'd like to put a high speed line in to this machine with a hardware firewall in front and serve maps up on the web. (I know we should be running NT Server or 2000 server, but this is just a pilot project.)

Thanks

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