As an IT administrator, it is important to understand the basics of DNS servers and how to set them up properly. DNS stands for Domain Name System and is used to translate domain names into IP addresses so that computers can communicate with each other over the Internet.
A DNS server is a computer system responsible for responding to DNS queries. It is responsible for translating domain names into IP addresses, and vice versa. When a user requests a web page, the DNS server translates the domain name into the IP address of the web server hosting the page.
There are two types of DNS servers: primary and secondary. The primary DNS server is responsible for storing the authoritative records for a domain. It is the first server contacted when a query is made for a domain. The secondary DNS server is a backup server that stores a copy of the primary DNS server's authoritative records. When the primary server is not available, the secondary server can be used to process DNS queries.
When setting up a DNS server, the IT administrator must first configure the primary and secondary servers. The primary server must be set up with the authoritative records for the domain and must be configured to allow incoming DNS queries. The secondary server must be set up with a copy of the primary server's records, and must also be configured to allow incoming DNS queries.
Next, the administrator must configure the DNS client settings on the computers or devices that will be using the DNS server. This includes setting the DNS server's IP address in the computer's network configuration.
The DNS server must also be configured to allow the computers and devices using it to communicate with the Internet. This involves configuring the server to allow incoming and outgoing DNS queries, and setting up the server's records to properly resolve all queries.
Finally, the administrator must configure the DNS server to allow access from outside the network. This involves setting up domain name forwarding, which allows users to access a domain name from outside the network. This can be accomplished by configuring the A and CNAME records for the domain on the server.
Setting up a DNS server is a complex task, but it is necessary for computers and devices to communicate over the Internet. By understanding the basics of DNS servers and how to configure them, an IT administrator can ensure that computers and devices are able to communicate with the outside world.