DNS in RHEL 9

DNS (Domain Name Service):

Used for Name (FQDN) to IP and IP to Name (FQDN) resolution.

DNS Record:

Record Description

A Used for Alias.

PTR Use for IP to Name resolution

MX Used for Mail Server

RPM package for DNS
bind
bind-utils

Configuration Files
/etc/named.conf
/etc/named.rfc1912.zones
/var/named/forward.zone
/var/named/reverse.zone

Note: You can give any name you like for forward.zone file and reverse.zone file.

To verify configuration of /etc/named.conf
named-checkconf

To verify configuration of zone file
named-checkzone domain.name zonefile
eg: named-checkzone wtuto.com forward.zone

Update the firewalld rules to allow incoming DNS traffic:
firewall-cmd --permanent --add-service=dns
firewall-cmd --reload

Record	Description
A	Used for Alias.
PTR	Use for IP to Name resolution
MX	Used for Mail Server

Stop, Start, Restart and Check Status of DNS Server (bind):
systemctl restart bind
systemctl status bind

To start bind automatically on OS boot time:
systemctl enable --now named

How To Install and Configure DNS Server in RHEL 9:

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