Dhcp not updating reverse ptr record
If you use this parameter, this resource record is able to be aged and scavenged.
If you do not use this parameter, the resource record remains in the DNS database unless it is manually updated or removed. Specifies the FQDN of a resource record in the DNS namespace.
DNS processes and interactions involve the communications between DNS clients and DNS servers during the resolution of DNS queries and dynamic update, and between DNS servers during name resolution and zone administration.
Secondary processes and interactions depend on the support for technologies such as Unicode and WINS.
The DNS server can use its own cache of resource record information to answer a query.
A DNS server can also query or contact other DNS servers on behalf of the requesting client to fully resolve the name, and then send an answer back to the client. In addition, the client itself can attempt to contact additional DNS servers to resolve a name.
Membership in Administrators, or equivalent, is the minimum required to complete this procedure.
On the DNS tab enable DNS dynamic updates and set to "Always dynamically update..." Also enable Dynamic Update for clients that do not request updates.
When a DNS client needs to look up a name used in a program, it queries DNS servers to resolve the name.
Each query message the client sends contains three pieces of information, specifying a question for the server to answer: For example, the name specified could be the FQDN for a computer, such as “host-a.example.”, and the query type specified to look for an address (A) RR by that name.
IPv4 reverse mapping is not mandatory though, as indicated by the mail example, it is essential for hosts that send mail, using either a Mail Transfer Agent (MTA) or a Mail User Agent (MUA).
In the case of IPv6 reverse-mapping was originally mandatory but as part of the seemingly relentless move to relax the goals of the original specifications (doubtless for good operational reasons) it is no longer a mandatory requirement.
Sometimes this is required for diagnostic purposes, more frequently these days it is used for security purposes to trace a hacker or spammer.