This is a problem they've had with their Uni Fi Security Gateway (USG) for quite some time, as documented here.Basically, however your device identifies itself to the DHCP server on the USG is how it will be inserted into DNS.If you have to manually assign an IP address, it will not register in DHCP, so resolution will fail.Finally, even if you specify an alias via the USG configuration, that alias will be ignored in favor of the way the host identified itself to the DHCP server initially (no matter how broken, like having spaces), and resolution will fail.The first domain controller in the tree hosts the DNS server by default.For other DSf W installations, such as child and additional domain controllers, the DNS server is optional and is not enabled by default.This happens even though DHCP registered the record.
To configure DHCP Option 081, you must look at the DHCP server properties, under the DNS Tab in DHCP properties. After configuring the above provedure, the credentials and Dns Update Proxy group configuratuion will not update current or delete duplicate records. DHCP will give that duplicate named client an IP, but it will not register it into DNS.
Ace Fekay, MCT, MVP, MCITP EA, Exchange 2010 Enterprise Administrator, MCTS Windows 2008, Exchange 2010 & Exchange 2007, MCSE 2003/2000, MCSA Messaging 2003 Microsoft Certified Trainer Microsoft MVP: Directory Services Active Directory, Exchange and Windows Infrastructure Engineer Compiled 4/2006, recompiled 7/2009, & 1/4/201011/30/2011 – added DHCP credentials and DHCP/DNS tab properties screenshots.3/10/2012 – Added enabling DNS scavenging screenshots.8/22/2012 – Verified with a Microsoft enginner, we need to use the Dns Update Proxy group and configure credentials to work, not one or the other. Also fixed missing screenshots8/3/2012 – Additional info about DHCP Name Protection and that it requires Credentials, Dns Update Proxy, but more so to secure the Dns Update Proxy group .
When a client shuts down, and later returns past the lease time, it may get a different IP address.
The second line in each script requires a tad of explanation.
In order to set IPv6 to use DHCP instead of pointing to local loopback (::1), we have to use the . Well, your dns resolving doesn’t return true unless we do this as it ‘catches’ the IPv6 before it gets to IPv4, so unless you specify your IPv6 you need to set this to DHCP.