Setting up a DNS server

Aug 10, 2024#Linux运维 #DNS20

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To set up a DNS server using BIND9 on a Linux system, follow these steps: 1. **Install BIND9**: Use the command `yum install -y bind bind-utils`. 2. **Start the Service**: Run `systemctl start named`. 3. **Check Service Status**: Use `systemctl status named` to verify it's running. 4. **Enable Auto-Start**: Configure the service to start on boot with `systemctl enable named`. 5. **Configure named.conf**: Edit `/etc/named.conf` to set options like listening ports, log file paths, and allowed query IPs. 6. **Set Up DNS Zones**: Modify `/etc/named.rfc1912.zones` to define zones for localhost and a custom domain (e.g., "elk.com"). 7. **Create Zone Data File**: Create `/var/named/elk.com.zone` to define DNS records for the domain and its subdomains. 8. **Set Permissions and Firewall**: Create a log directory, set permissions, and allow DNS service through the firewall using `firewall-cmd`. 9. **Update Network DNS**: Change the DNS server to `10.10.2.103` using `nmtui` and restart the network. 10. **Verify Configuration**: Test the DNS setup by pinging external and internal domains. Ensure to restart the named service and the network manager for changes to take effect.

Server Side#

(1) Install bind9 online

yum install -y bind bind-utils

(2) Start the service

systemctl start named

(3) Check the service status

systemctl status named

(4) Configure the service to start on boot

systemctl enable named

(5) Modify the named service configuration file to set the DNS log path

vi /etc/named.conf
-------------------named.conf-------------------
options {
        // Accept DNS requests from any network interface
        listen-on port 53 { any; };
        listen-on-v6 port 53 { ::1; };