Sometimes it also useful to be able to start with an IP address and find the name allocated to it; email systems especially use this technique as part of an antispam arsenal.
DNS performs IP address-to-name translation by manipulating the IP address and using reverse-mapped zones under the reserved domain name Now, by way of illustrating the sometimes confusing nature of the DNS, some organizations (especially smaller ones) elect to run both caching and authoritative functions in the same name server.
We will set these up two Bind servers for our domain in a master-slave configuration.
To complete this guide, you will first need to be familiar with some common DNS terminology.
In tech speak, DNS resolves a name (domain name) into an IP address using a series of queries to authoritative DNS servers until the final answer, an IP address, is obtained.
This process is referred to as , which finally will return the IP address we require.
It is very important when troubleshooting dynamic updates on Unix BIND or MS DNS Servers to have DNS logging enabled, esp.
to see the Update, Notify and Zonetransfer pakets in the logs.
Below is a simplified description of the dynamic update process with information of common issues in each step that can lead to a dynamic DNS update failure.Authoritative-only DNS servers are often a good configuration for high performance because they do not have the overhead of resolving recursive queries from clients.article before read this article so that you can properly understand the whole topic.Check out this guide to learn about the concepts we will be implementing in this guide. One will be for the "master" DNS server where the zone files for our domain will originate and one will be the "slave" server which will receive the zone data through transfers and be available in the event that the other server goes down.This avoids the peril of having a single point of failure for your DNS servers.This article describes five things that you can do to keep you and your organization safe as well as reduce unnecessary load on the DNS infrastructure: ) or zone file fragments are included.