Reverse dns not updating
Before setting up the reverse DNS for your Linode, be sure to set up your domain zone and DNS records through Linode’s DNS Manager.You may also wish to view our guide on Common DNS Configurations.
This is because DHCP doesn’t own the record, the client does, even though DHCP registered it. If you have Windows 2008 R2, in addition to configuring the DNS tab to force registration, you still must configure credentials and add the server to the Dns Update Proxy group.Please do not confuse this error message with the standard "authorisation failed" message (which indicates that you have supplied the wrong password for the specified maintainer object). This tends to indicate that the nominated nameservers are not replying correctly for the zone in question.Reverse DNS (r DNS) is name resolution that looks up an IP addresses to obtain a domain name, performing the opposite function of the DNS server, which turns domain names into IP addresses. Typically, spammers use invalid IP addresses, that is, ones that do not match domain names.A lesser-known task that DNS performs is determining the hostname from an IPv4 address, commonly called reverse resolution.This is normally used by servers to find the human-friendly name associated with the IP address.ARIN’s delegation management tools enable you to individually manage each reverse delegation within both IPv4 and IPv6 networks.
Delegations can be managed in IPv4 on bit boundaries (/8, /16 or /24s), and IPv6 networks can be managed on nibble boundaries (every 4 bits of the IPv6 address).
DNS is known to most Internet users for translating hostnames into IP addresses (called forward resolution).
An example of this is entering the browser and receiving an IP address for the server dedicated to that website.
Another use of maintainer objects is to protect the space that is logically beneath an object with the 'mnt-lower' attribute set.
There exists a domain object named 'in-addr.arpa' which has the 'mnt-lower' set, which ensures that no unauthorised creations occur beneath the zone.
The way to get around this is you can configure DHCP’s Option 081 to update the record for all client, no matter if the client asks or not. If DHCP is on a Windows 2008 R2 DC, to protect the DC when using the Dns Update Proxy group, you must secure the group by running: dnscmd /config /Open Acl On Proxy Updates 0 Using “DHCP Name Protection.” will register A and PTR record on behalf of a client, and will prevent a workstation (non-Windows) Name Squatting, meaning using a name that another machine (non-Windows or Windows) client that DHCP already registered , from registering it’s name.