Windows dns ptr records not updating


20-Apr-2020 23:48

Here is my config for DHCP on the switch -ip dhcp pool PC network 10.1.70.0 255.255.255.0 domain-name dns-server 10.1.1.1 10.1.1.2 default-router 10.1.70.1 lease 8This is an office across the street from the main building.

Dont have a router there, only a 3750 tied in via a fiber link.

The Domain Name System delegates the responsibility of assigning domain names and mapping those names to Internet resources by designating authoritative name servers for each domain.

Network administrators may delegate authority over sub-domains of their allocated name space to other name servers.

Most prominently, it translates more readily memorized domain names to the numerical IP addresses needed for locating and identifying computer services and devices with the underlying network protocols.

By providing a worldwide, distributed directory service, the Domain Name System is an essential component of the functionality of the Internet, that has been in use since 1985.

Scavenging has never been turned on and it is full of stale records and it's full of computers (PCs and servers) that have time stamps several years old.

I noticed the function getting stuck on the DNS_PTR record, which caused it to return FALSE with this error: PHP Warning: dns_get_record(): res_nsend() failed in ....

A Canonical Name (CNAME) record creates an alias for a fully qualified domain name.

When a user attempts to access a domain name that is actually an alias, the DNS system substitutes the real domain name — known as the Canonical Name — for the alias.

Even though the server is still alive, it's never refreshed its time stamp in DNS.

windows dns ptr records not updating-5

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There are a lot of these, both PCs and servers, that have really old time stamps.

This mechanism provides distributed and fault tolerant service and was designed to avoid a single large central database.