Guest Barry Posted September 13, 2007 Posted September 13, 2007 Hi all, I have 2 seperate domains connecting to the one DHCP server through the same VLAN. Each Domain has its own DNS server, How can I tell the DHCP Server to hand out DNS Address to domain A and another to Domain B? as each domain has its own DNS server. At the moment all its doing its handing out the 2 domains with the same DNS, IP etc defined in the scope. Is there any way of telling the DHCP server that if a client comes from domain A hand out this DNS addresses and if comming from Domain B give it this DNS addresses? cheers barry
Guest Mathieu CHATEAU Posted September 13, 2007 Posted September 13, 2007 Re: DHCP problems Hello, Do you have a trust between both domain ? Since windows 2000, DHCP should only update the PTR, workstation are now updating their IN A record themselves. Using DNS servers with DHCP http://technet2.microsoft.com/windowsserver/en/library/d0e19b57-c368-46c2-b017-caf25ae150ec1033.mspx?mfr=true -- Cordialement, Mathieu CHATEAU http://lordoftheping.blogspot.com "Barry" <b.clyde@wintoncapital.com> wrote in message news:1189695147.275563.194680@g4g2000hsf.googlegroups.com... > Hi all, > > I have 2 seperate domains connecting to the one DHCP server through > the same VLAN. > > Each Domain has its own DNS server, How can I tell the DHCP Server to > hand out DNS Address to domain A and another to Domain B? as each > domain has its own DNS server. > > At the moment all its doing its handing out the 2 domains with the > same DNS, IP etc defined in the scope. > > Is there any way of telling the DHCP server that if a client comes > from domain A hand out this DNS addresses and if comming from Domain B > give it this DNS addresses? > > cheers > > barry >
Guest Ryan Hanisco Posted September 17, 2007 Posted September 17, 2007 RE: DHCP problems Hi Barry, DHCP servers work through broadcasts. When a workstation needs a new address, it sends out a server request and whatever DHCP server responds first (on the broadcast domain or through IP Helper-address) wins. Unfortunately, DHCP is not aware of things like domains and will give an address to anything that requests it. In a windows domain the DHCP server can do a lot of things on the Domain's behalf -- like register DNS -- but this is as part of it handing out the address rather than before it has made the connection. You have a few options though, but none of them are easy or simple. 1. Create new subnets --- this would segment your DHCP traffic and allow you to ensure that the DHCP server for each domain can only service its own clients. You would use VLANs to segment these by port assignment. 2. User 802.1x to control DHCP authentication based on machine certificate via EAP. This is a complicated solution, but it is secure and would authenticate the machines before they has IP addresses. 3. Create machines classes in DHCP and create DHCP scopes on these classes on ONE DHCP server and allow the workstations to do their own DNS registration. 4. Hardcode all your IP addresses/ I think those are the only real options you've got. I'd personally go with option #1. -- Ryan Hanisco MCSE, MCTS: SQL 2005, Project+ http://www.techsterity.com Chicago, IL Remember: Marking helpful answers helps everyone find the info they need quickly. "Barry" wrote: > Hi all, > > I have 2 separate domains connecting to the one DHCP server through > the same VLAN. > > Each Domain has its own DNS server, How can I tell the DHCP Server to > hand out DNS Address to domain A and another to Domain B? as each > domain has its own DNS server. > > At the moment all its doing its handing out the 2 domains with the > same DNS, IP etc defined in the scope. > > Is there any way of telling the DHCP server that if a client comes > from domain A hand out this DNS addresses and if coming from Domain B > give it this DNS addresses? > > cheers > > barry > >
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