Setting up and managing nameservers in WHM (Web Host Manager) involves several steps. Here's a general guide to get you started:

1. Access WHM: Log in to your WHM interface. Typically, you can access it by navigating to https://yourdomain.com/whm and entering your credentials.

2. Set up Nameservers:

   • Go to "Basic cPanel & WHM Setup" in the WHM dashboard.
   • Enter your primary nameserver details (e.g., ns1.yourdomain.com) and its corresponding IP address.
   • You can set up secondary nameservers as well if you have them.

3. Configure DNS: After setting up nameservers, configure DNS zones for the domains hosted on your server. You can do this in WHM by going to "Edit DNS Zone" or "DNS Functions".

4. Register Nameservers with Your Registrar: Once your nameservers are set up in WHM, register them with your domain registrar. This typically involves logging in to your domain registrar's website and entering the nameserver details provided by WHM.

5. Update Nameserver Records: After registering your nameservers with your domain registrar, you'll need to update the nameserver records for your domain to point to the newly registered nameservers. This is done through your domain registrar's control panel.

6. Test Configuration: After completing the setup, it's essential to test your nameserver configuration to ensure that DNS resolution is working correctly. You can use online tools like nslookup or dig to perform DNS lookups and verify that your nameservers are resolving domain names correctly.

7. Monitor and Manage: Regularly monitor your nameservers and DNS configurations for any issues or changes. WHM provides tools for managing DNS zones, checking server status, and troubleshooting DNS-related problems.

Remember to follow best practices for security and performance when setting up and managing nameservers in WHM. This includes keeping your server software up to date, implementing proper firewall rules, and regularly monitoring server logs for any suspicious activity.