Power DNS – Authoritative and Recursor DNS Servers
Authoritative Nameservers area unit DNS Servers that contain the DNS records for your domains. The authoritative nameserver can answer queries with info directly from its records.
Recursor DNS servers (commonly brought up as algorithmic or Resolving) perform between the tip user and also the authoritative DNS server. Queries that area unit submitted by the tip user gain the algorithmic DNS server 1st, that then searches for the records in its cache. If the queried record can not be found within the cache, the algorithmic server then sends the question to the authoritative nameserver to resolve the requested record details.
PowerDNS Caching
By default, PowerDNS uses ‘Packet Cache’ to spot similar queries and also the provides connected answers severally. It will this with none any process of the request. The default cache interval relies on the TTL (time to live) setting for PowerDNS, that is twenty seconds.
In addition to caching entire packets, PowerDNS also can cache individual queries. Most DNS queries generally involve extra backend queries. A superb example of a backend queries would be the search for a CNAME record.
When Associate in Nursing end-user queries the ‘A’ record for ‘www.example.com,’ PowerDNS should 1st run a background question to envision for the ‘www’ CNAME record. The PowerDNS question Cache can cache these sorts queries for faster recall within the event of comparable future requests.
PowerDNS blessings
While BIND is utterly fine for the common host or user, PowerDNS provides a sturdy set of options and additional performance fitted to larger server environments with load-balancer configurations, like reseller.
One in all the crucial parts of PowerDNS is that it supports DNSSEC (DNS Security Extensions) making an additional layer of security for your domains DNS. Also, PowerDNS encompasses a convenient web-based computer program known as Poweradmin that encompasses a style of useful management tools.
Poweradmin
Poweradmin is a browser-based administration tool for PowerDNS. It supports master, native and slave zones types. It can also be used for automatic provisioning and supports multiple coding languages. Below are a few examples of what the Poweradmin interface looks like and the tools and features it posses. For a full list of Poweradmin features visit https://www.poweradmin.org/features.html.
Main Page
Available tools and features can be seen on the main page of Poweradmin when you first log in.
Search Tool
Utilizing the search tool allows you to query all of the DNS zone setups with your PowerDNS for a specific string of text (name, IP address, etc.)
Add a Master Zone
The Master Zone is used as the primary point of a query for all DNS requests made to the PowerDNS.
Secondary Zone
As a fail safe, the secondary zone handles DNS queries should the Master Zone experience issues or go unresponsive.
