How to configure a DNS domain name resolution server in Linux?
To configure a DNS domain name server in Linux, you can follow these steps:
- Install DNS server software:
- The most commonly used DNS server software is BIND (Berkeley Internet Name Domain), which can be installed through a package manager, for example, using the command “sudo apt-get install bind9” on Ubuntu.
- Set up the main configuration file.
- The main configuration file is located at /etc/bind/named.conf, open and edit this file.
- In the named.conf file, you can configure global options, zones, and zone files.
- Global options include the IP address of the server, the network range allowed for queries, and cache settings.
- Area definition includes local area and forwarding area, which can be configured as needed.
- Set up configuration for the region file:
- The zone files are located in the /etc/bind directory, starting with the prefix db, for example db.example.com.
- The zone file defines the correspondence between domain names, hosts, and IP addresses.
- The regional file can be configured with hostnames (A records), aliases (CNAME records), mail servers (MX records), and more.
- Restart the DNS server:
- After the configuration is complete, restart the DNS server using the following commands:
For Ubuntu, use the command: sudo service bind9 restart
For CentOS, use the command: sudo systemctl restart named - Set up client:
- Edit the /etc/resolv.conf file on the client side and add the IP address of the DNS server to the nameserver line.
- You can use multiple DNS servers and add multiple IP addresses in order of priority.
Once the configuration is complete, the DNS server will be able to resolve domain names and provide domain resolution services. Keep in mind that parameter modifications may be required during the configuration process according to actual circumstances, and ensure that the network connection is functioning properly.
