DNS Security

The Domain Name System (DNS) translates human-readable domain names into IP addresses. It is one of the most critical — and most targeted — components of network infrastructure. A compromised DNS can redirect users to malicious sites, intercept communications, and disrupt entire organisations.

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How DNS Works

DNS Resolution Process

1. User types "example.com" in browser
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2. Check local cache → Not found
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3. Query recursive resolver (ISP or corporate DNS)
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4. Resolver queries root nameserver → Refers to .com TLD
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5. Query .com TLD nameserver → Refers to example.com authoritative NS
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6. Query authoritative nameserver → Returns IP: 93.184.216.34
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7. Resolver caches result and returns to client
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8. Browser connects to 93.184.216.34

DNS Record Types