install NAT server?

1 cisco router with firewall - complete control over it
1 server with windows server 2003 standard. Server is the primary DC with DHCP and DNS installed.
approximately 10 client machines (mostly win xp, some win 98)

What is the best way to give internet access to the client machines? Via the router OR should I install NAT server? Any other suggestions are welcomed. What is the most secure way of giving clients internet access? Which way would have the least impact on the server?

Please keep in mind that I am a NEWBIE. Details appreciated.
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it is totally possible to give users internet access to the internet via a cisco router with fire wall but if you have another server it would be better to put in a proxy server Microsoft ISA 2004 server is very good, it give you the ability to control what users can and cannot to on the web and allow you to report on it ect....

the router would more than likey use NAt any how so there is not point putting in a NAT server, ISA does do application filtering but if you just want layer 3 and 4 filtering ie protcals like HTTP. HTTPS, DNS ect then router will be fine.

Hope this helps

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Windows Server 2003

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