CIDR notation help - allow IP range - Exch. Server 2007

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chronk

Thread Starter
Joined
May 24, 2007
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152
Need help with allow list for Exchange Server 2007.

Need to allow an IP range - and do not know how to transfer the CIDR notation information into the IP range.
Anyone know the math behind this?

Specifically - I want to allow the IP range:
65.52.0.0 to 65.55.255.255

Would I enter 65.52.0.0/22 ( not sure of the last number to enter to allow between 52.0.0 and 55.255.255.
Or would I need to enter 65.52.0.0/nn (nn = unknown -to me- number)
Then 65.53.0.0/nn etc - as i am unsure of the math - not sure if the 65.52 through 65.55 range can be expressed in one
entry.

Found this reference
"The CIDR notation 192.168.0.0/24 would be written as 192.168.0.0/255.255.255.0:
at:
http://en.wikipedia.org/wiki/CIDR_notation

Okay - so if the .0.0/24 ranges to .255.255.0 - then how would one bump up the last octet - from 0 to the desired 255?


Thank You for looking!
 
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