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What ports should be open on a Cisco 871 for Exchange and Remote Desktop

ncallas2000
ncallas2000 asked
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Last Modified: 2010-08-05
Hello all,
I have an 871 Cisco router and I'm using SDM to configure the unit. My question is what ports should only be open to just have exchange work (safely). As you know there are a number of Protocol/Services (TCP, UDP, ICMP, and IP) to configure for the returning traffic IP's. So what ports should be opened under TCP, UDP, ICMP, and IP. I have the server internal IP in the NAT mapped to an outside IP. Is there a Cisco guide out there that can get me started?

Warmest Regards, Nick
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