Lack of wildcard DNS entry found

A wildcard DNS is used to share some files among the domin and its sub-domins. A wildcard DNS record may be a record in an exceedingly DNS zone that may match requests for non-existent domain names. This server lacks the wildcard DNS entry. It narrows down the addresses at which the organisation hosts machines. It significantly reduces the preparatory work necessary to locate machines, map the topology and launch an attack.

Example

*.example.com. 3600 IN MX 10 host1.example.com.

Impact

The attacker can attack the domain and its sub-domains.

Mitigation / Precaution

• Implement wildcard DNS entry
  • cpanel
    • Login to your cpanel.
    • Goto to the Subdomains icon in the Domains section.
    • Add a subdomain called *
    • Make sure to set the document root to your public_html folder.

Written by

Febna V M

Cyber Security Engineer

Febna once spent an entire evening arguing with an AI chatbot just to prove that machines can be confidently wrong. The debate ended with no clear winner, but it did spark her curiosity for the fascinating world of artificial intelligence. Today, she works at the intersection of AI and cybersecurity, helping build smarter systems while making sure they don’t become too smart for their own good. When she’s not exploring the future of technology, she’s probably asking “but what if?” one more time.