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2 IP addresses on my exchange server

Posted on 2004-09-15
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Last Modified: 2012-08-13
Within my local subnet I have 2 IP adresses designated on my Local Connection. Is there a good reason for this or is it an opportunity for confusion?
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Question by:jwstock
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by:Yan_west
ID: 12068224
It is possible to assign 2 ipaddresses on 1 NIC. Sometimes, people do that to keep old application running with a fixed addressed coded in.. Maybe some software were setup using another address too.. and the admin did not want to reconfigure everyone, so he added the second address to the connection.
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by:Yan_west
ID: 12068229
We're talking about a private ip address right? Not public?
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by:jwstock
ID: 12068598
Yes these are both private IP addresses. The only applications running on this box are Exchange related. It is possible that when they migrated from 5.5 to 2003 they assigned a new ip address to 2003 during the transistion. Would that make sense?
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by:jwstock
ID: 12068636
If that is the case would any special configuration be necessary for routing the public IP address to the correct private IP address?
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Yan_west earned 2000 total points
ID: 12068973
Hmmm, I have no idea why they would do that btw.. Even if only exchange is running on this box, something running on another box could be using this address.
Keep them both there. It doesnt hurt, and it keeps things working :)

If you really want to know what is using this IP, you could install a Network Sniffer, and have a look at the traffic that goes to your exchange server.

here is a free one:

www.ethereal.com

You'll probably find it diffcult to use.. there's a pretty steep learning curve to be able to understand a network sniffer like this when you never used one.
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