I asked this on an existing thread but I think it's dead.
I'm having trouble with DHCP addresses not populating to DNS and RDNS.
The problem became apparent with my laptops accessing our wireless network. The wireless system (Extreme Networks) uses a RDNS lookup to get the computer name, if the FQDN indicates it's a member of our domain, it's allowed access, otherwise it's sandboxed. Some of our laptops were being denied access, and we found that they had no or incorrect RDNS entries - sometimes they weren't there, sometimes they were there but had a different IP than what DHCP had just assigned. Most of the time, everything worked properly.
I tried reconfiguring everything using Ace Fekay's blog at http://blogs.msmvps.com/acefekay/2009/08/20/dhcp-dynamic-dns-updates-scavenging-static-entries-amp-timestamps-and-the-dnsproxyupdate-group/ . When I finished with that, the problem became consistent - every laptop would get a DHCP assigned address on our network, the address would populate to DNS, but not to RDNS. As a workaround, I had to change the DNS properties on the RDNS zones to allow secure and nonsecure updates, rather than the correct setting to allow secure updates only.
I noted when researching this, the blog says to secure the servers with dnscmd /config /OpenAclOnProxyUpdates 0, but another discussion I found, the person who got this to work with Server 2012, used a setting of "1" with that command.
Not sure what to make of that.
I have DHCP and DNS running on a pair of Server 2008r2 servers (DHCP uses exclusions for opposite halves of the IP range on each server). The servers are also my DCs.
One other difference between the process in the blog and my environment, I did not have the DNSUpdateProxy group available in BuiltIn, I added the servers to the group by going to the server object and adding the group on the Member Of tab.
Any suggestions on how I can get this working in a secure environment would be appreciated.