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The updates to the zone is protected by the key (similar to: allow-update { key "rndc-key"; }).

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Not to get your hopes down, but i don't think that is possible... Why not just use dhcpd on Linux? – Source Lab Aug 17 '10 at 20:59
I use dhcpd at home. I heard that at work some DHCP servers were added and they are Windows based. I don't know how they implemented security. Could they have used certificates instead of keys? – James Aug 17 '10 at 21:19
afaik DHCP servers have no keys or certificates, security has got nothing to do with weather you can get an IP address or not. Most access-points/routers have the possibility not to use the internal DHCP server. – Source Lab Aug 20 '10 at 16:30
You can use IP based access control (allow the dhcp server to update), or you can use a Windows DNS server (using GSSAPI access control). – Martin v. Löwis Aug 21 '10 at 0:14
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I think this question belongs to ServerFault, as it involves knowledge of both the Windows and the Linux side. – Riccardo Murri Sep 8 '10 at 17:15
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The DHCP server never updates the DNS server anyway, at least for ones I've used. What happens is that the DHCP client obtains the IP address (and potentially hostname) from the DHCP server and then itself tries to update the DNS server.

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I am not sure that is the case. Allowing clients to update the DNS zone directly would be a security nightmare. A rogue client can wreck havoc on the network if it is allowed to update the DNS zones. When I setup the DNS on Linux, I setup who can update the zone and then I have to setup the DHCP with that same information. Here is what Windows does: technet.microsoft.com/en-us/library/cc787034(WS.10).aspx. Here is a question at ServerFault: serverfault.com/questions/34553/dhcp-failing-to-update-dns. – James Sep 13 '10 at 16:11

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