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ip to user mapping in AD environment

Posted on 2008-06-12
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Last Modified: 2013-12-24
I am working on a network gateway appliance and like to log all the users going out to the internet through this gateway. Every user gets the ip address from a dhcp server and must be authenticated by a AD server first. All I have is the source ip address in the ip packet. Is there a way to query the userid from the AD server using the ip address?

Thanks.
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Question by:mike233
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by:pbeirne
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There is no inherent Active Directory user to IP mapping.  You would have to use some other means to create a database that contains the mapping such as a logon script that populates a database with the user info and IP.
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by:mike233
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Can you give me a pointer how the logon script can be done? Is it run on the AD server? Thanks.
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by:pbeirne
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One other alternative might be to programmatically query the WINS database which holds both user and IP registrations and then parse the output to a file or database.

You can download a tool from microsoft to run a WINS query via command line. It's called NBLOOKUP and works pretty much like NSLOOKUP for DNS.

http://support.microsoft.com/Default.aspx?kbid=830578

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