Windows Server 2003 and ISA - enable internet access across LAN (DNS?)

I have set up Windows Server 2003 and installed ISA Standard.  Since installing ISA, none of the client PCs on the LAN are able to connect to the internet.  I've set up the local IP ranges and a firewall rule, and applied the server proxy settings to the client PCs.  Do I need to enable DNS on the local PCs, or what steps do I now need to take in order to cause the server and internet to be accessible by the local network?  I'm missing something...

Thanks!
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psk1Asked:
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psk1Author Commented:
The client PCs are running Windows XP.
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psk1Author Commented:
The server is connecting to the internet through one NIC and the LAN is connected to the server by a switch and NIC.
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harleyjdCommented:
I have found that ISA server doesn't like straight through (secure) NAT for www traffic, but does allow it for other traffic.

So if the clients can ping external sites, resolve names etc then you might just need to add the Proxy Server info to the worksations for www...

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Windows Server 2003

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