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DHCP

Hi Experts,

                     I have a doubt related to Authorize option in DHCP. It can be used when DHCP is running in the Domain environment. What this Authorize option does.
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columbuseng
Asked:
columbuseng
3 Solutions
 
RdsterlingCommented:
When a DHCP server is authorised, then it means that it is authorised to give out DHCP addresses. The DHCP server would have to be a membert of the domain in a Windows environment.
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ChiefoftheChissCommented:
It seems you are asking why you would want to do this?
mainly:
The Windows Server 2003 family provides integrated security support for networks that use Active Directory. This support adds and uses a class of objects that is part of the base directory schema, providing the following enhancements:

A list of IP addresses available for the computers that you authorize to operate as DHCP servers on your network.

Detection of unauthorized DHCP servers and prevention of their starting or running on your network.


Above pulled from here:
http://technet.microsoft.com/en-us/library/cc781697(WS.10).aspx
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Krzysztof PytkoSenior Active Directory EngineerCommented:
To prevent rogue DHCP servers in your domain environment. But unfortunately it works only for Windows-based DHCP servers. You need to be an Enterprise Administrators group member or DHCP Administrators group member to be able to authorize DHCP server.

Then DHCP server will be able to issue DHCP leases to hosts within your network.

Regards,
Krzysztof
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Krzysztof PytkoSenior Active Directory EngineerCommented:
and one more (useful) thing. If you wish (as Enterprise Administrator) to check how many and what servers are DHCP in your domain, open AD Sites and Services console, select root node and from menu choose "Show Services Node". Then under Services node in "NetServices" you will see full DHCP server list :)

Krzysztof
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columbusengAuthor Commented:
In windows based environment, If DHCP is not authorized by AD whether the DHCP server will provide IP to clients or not .
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Krzysztof PytkoSenior Active Directory EngineerCommented:
If it is a domain environment, no. If DHCP server is a domain member and it's not authorized, it won't be able to issue any DHCP leases.

Krzysztof
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columbusengAuthor Commented:
Hi iSiek,

                    Im having a doubt that if DHCP is authorized by AD. Whether DHCP related files or objects will store in AD.
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Krzysztof PytkoSenior Active Directory EngineerCommented:
Hi,

open DHCP console and specify server which you want to check.
If it has red down arrow, it's not authorized.
If it has green up arrow, it's authorized.

and remember. After DHCP server is authorized, each scope must be also activated :)

Krzysztof
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Krzysztof PytkoSenior Active Directory EngineerCommented:
oh, and another simple and quick way is to use NETSH command with DHCP context :) But DHCP context is available only in NETSH on server.

Log on to any windows server and from command-line type:

netsh dhcp show server

it will list all authorized DHCP servers in a domain

Krzysztof
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