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July 1st, 2004, 10:06 AM
#1
I've forgotten, but..
I'm working with Exchange 2000, in which, I am using the SMTP Virtual Server's "Deny Access" to block IP addresses which send spam, and to block countries who would have no other interest in what our company does. (example, why would people in China be interested in an apartment complex in Oklahoma, plus they could get to our web site, and call...)
Anyhow, my question is, if I want to block 202.0.0.0~203.0.0.0, with a subnet mask of 254.0.0.0 - do I need to use 202.0.0.0/7 or 203.0.0.0/7 ?
Thanks!
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July 1st, 2004, 04:22 PM
#2
 Originally Posted by kannibul
I'm working with Exchange 2000, in which, I am using the SMTP Virtual Server's "Deny Access" to block IP addresses which send spam, and to block countries who would have no other interest in what our company does. (example, why would people in China be interested in an apartment complex in Oklahoma, plus they could get to our web site, and call...)
Anyhow, my question is, if I want to block 202.0.0.0~203.0.0.0, with a subnet mask of 254.0.0.0 - do I need to use 202.0.0.0/7 or 203.0.0.0/7 ?
Thanks!
My God, no one knows this?
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July 2nd, 2004, 05:57 AM
#3
Driver Terrier
Since 202.0.0.0/7 translates to a broadcast address of 203.255.255.255, I would assume 202.0.0.0/7 if exchange is asking for CIDR notation...
I don't do exchange so I can't help past this.
Never, ever approach a computer saying or even thinking "I will just do this quickly."
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July 2nd, 2004, 06:10 AM
#4
Registered User
Could this IP calculator help you?
There's no panic like the panic you momentarily feel when you've got
your hand or head stuck in something
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July 2nd, 2004, 06:48 AM
#5
Driver Terrier
You mean you use a calculator?
I don't think I will ever forget the 50 exercises in binary subnetting I did last semester... 
Never, ever approach a computer saying or even thinking "I will just do this quickly."
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July 2nd, 2004, 12:08 PM
#6
Senior Member - 1000+ Club
Originally Posted by NooNoo
You mean you use a calculator?
I don't think I will ever forget the 50 exercises in binary subnetting I did last semester...
You will.... I 've forgotten mine already 
I'm in charge and I say we blow it up
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July 2nd, 2004, 02:18 PM
#7
Registered User
Originally Posted by Outcoded
You will.... I 've forgotten mine already
Exactly, I remembered mine for about an hour 
There's no panic like the panic you momentarily feel when you've got
your hand or head stuck in something
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July 2nd, 2004, 04:11 PM
#8
Senior Member - 1000+ Club
A post-exam trip to the bar soon cured mine 
I'm in charge and I say we blow it up
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July 6th, 2004, 08:54 AM
#9
Originally Posted by NooNoo
Since 202.0.0.0/7 translates to a broadcast address of 203.255.255.255, I would assume 202.0.0.0/7 if exchange is asking for CIDR notation...
I don't do exchange so I can't help past this.
Well, it's wanting:
IP / Subnet Mask
Example:
192.168.1.0 / 255.255.255.0
I'm wondering if I should use:
202.0.0.0 / 254.0.0.0 or if it should be 203.0.0.0 / 254.0.0.0
EDIT: Also, thanks for the replies!
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July 6th, 2004, 10:32 AM
#10
Driver Terrier
202.0.0.0 I would think, after all it wants to know which networks to block. if you give it 203, the subnetting will be wrong.
Never, ever approach a computer saying or even thinking "I will just do this quickly."
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July 6th, 2004, 11:25 AM
#11
Originally Posted by NooNoo
202.0.0.0 I would think, after all it wants to know which networks to block. if you give it 203, the subnetting will be wrong.
Thats what I thought too. Thanks!
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