The TCP/IP settings for all network interfaces share an optional set of DNS suffixes that the Registry calls a Search List.
If you elect to use the entries in a search list, the resolver ignores the primary suffix, its parents, and the connection-specific suffix.
In IPv4, Internet Service Providers (ISPs) commonly provide IN-ADDR. Several options exist for providing reverse DNS in IPv6.
ARPA information for their customers by prepopulating the zone with one PTR record for every available address. This document analyzes different approaches and considerations for ISPs in managing the ip6zone for IPv6 address space assigned to many customers. The conscientious might then also have a zone: 1.string.region. All of these options also exist for IPv4, but the scaling problem is much less severe in IPv4.
But even the most highly trained and savvy administrator can get in a hurry and make a mistake.
Also, the more experience you have, the more likely you are to make your DNS infrastructure complex, inviting the attention of Mr.
If the TCP/IP settings for a member computer specify the IP address of a public DNS server—perhaps at an ISP or DNS vendor or the company’s public-facing name server—the TCP/IP resolver won’t find Service Locator (SRV) records that advertise domain controller services, LDAP, Kerberos and Global Catalog.Reverse DNS allows a user to identify the domain that is associated with an IP address.Users have the ability to update their Reverse DNS records at any time to change the PTR and time to live (TTL).Without these records, a member computer can’t authenticate and get the information it needs to operate in the domain.It then acts like a teenager who can’t get the car keys, growing sullen and exhibiting a variety of bad behaviors. Let’s say you’re a VAR with a customer you plan to upgrade from NT 4.0 to Windows 2000 Server or Windows Server 2003.