What is master and slave DNS?
Master DNS server is a server that stores the original copies of all zone records. In contrast, slave DNS server is a server that uses a special automatic updating mechanism to communicate with the master server to maintain an identical copy of data similar to the master server.
How do I setup a DNS server as a slave?
Configure BIND as Slave DNS Server on Ubuntu 18.04
- Update your system. apt update apt upgrade.
- Install BIND and BIND Utilities. apt install bind9 bind9-utils.
- Configure Master Zone Transfer.
- Configure Slave DNS server.
- Create Slave Forward and Reverse Zone Files.
- Verify Resolution on the Client.
What is DNS slave zone?
The Slave/Backup DNS zone also known as Secondary is the read-only copy of the DNS records. This means that the DNS records cannot be added directly to the Slave/Backup DNS zone. The Slave/Backup DNS zone can receive the updated records only from the Master zone of the DNS server.
What is master server and slave server?
One server is the master and at least one is the slave server: master — this server contains and manages resource records (description) if the domain zone. slave — this server receives and keeps the information about domain zones from the master server. You cannot change the description of the domain zone.
What is the difference between master and slave?
Simply, a master is a device or a process that controls other devices or processes and a slave is a device or a process that is controlled by another device or a process.
What is master slave control?
Master/slave is a model of asymmetric communication or control where one device or process (the “master”) controls one or more other devices or processes (the “slaves”) and serves as their communication hub.
What is master slave mode?
The master/slave mode is used for hierarchically managing the access rights of common resources in a communications system. In decentral bus-controlled systems, for instance, an automation device (master) grants access rights for the other components (slaves).
What happens if primary DNS down?
Provides redundancy in case the primary DNS server goes down. If there is no secondary server, when the primary fails, the website will become unavailable at its human-readable domain name (although it will still be accessible by its IP). Distributes the load between primary and secondary servers.
How does master-slave work?
Master-slave replication enables data from one database server (the master) to be replicated to one or more other database servers (the slaves). The master logs the updates, which then ripple through to the slaves. If the changes are made to the master and slave at the same time, it is synchronous.