Understanding DNS Spoofing Attacks: Fake IP Resolution & Redirection Explained in Depth
This blog post provides a deep, cybersecurity-focused explanation of a visual diagram titled “Understanding DNS Spoofing Attacks: Fake IP Resolution & Redirection”.
The diagram compares two scenarios side by side:
- A Normal DNS Flow (Legitimate)
- A Spoofed DNS Flow (Attack Scenario)
The purpose of this explanation is to help readers clearly understand how DNS works under normal conditions, how attackers manipulate DNS responses, and how users are silently redirected to malicious websites.
This post assumes no prior knowledge and explains every visible element in the image, from icons and arrows to text labels and colors.
1. What This Diagram Represents Overall
The diagram explains how DNS (Domain Name System) resolution works and how it can be abused.
DNS is the system that converts human-readable domain names (like example.com) into IP addresses that computers use to communicate.
The diagram is split into two clearly separated sections:
- Left side: Normal DNS Flow (Legitimate) shown in blue
- Right side: Spoofed DNS Flow (Attack Scenario) shown in red
This color separation immediately communicates trust versus danger.
2. Normal DNS Flow (Legitimate)
The left half of the diagram is labeled:
NORMAL DNS FLOW (Legitimate)
This section shows how DNS resolution works when there is no attack.
2.1 Components Shown in the Normal DNS Flow
The following components are visible:
- User (Victim) – a person using a computer
- Legitimate DNS Server – a trusted DNS resolver
- Legitimate Website (example.com) – the real destination
Each component is shown with clean, neutral icons and blue arrows, indicating safe and expected behavior.
2.2 Step-by-Step Normal DNS Resolution
The diagram numbers each step clearly.
Step 1: DNS Query
1. DNS Query (example.com)
The user sends a DNS query asking:
“What is the IP address of example.com?”
A blue arrow points from the user to the legitimate DNS server, showing the direction of the request.
Step 2: Real IP Response
2. Real IP Response (1.2.3.4)
The legitimate DNS server replies with the correct IP address.
The arrow points back to the user, confirming a trusted response.
Step 3: Connection to the Website
3. Connects to (1.2.3.4)
Using the correct IP address, the user connects to the legitimate website.
A lock icon on the website visually indicates a secure and trusted connection.
2.3 Outcome of Normal DNS Flow
At the bottom of this section, the diagram states:
User gets the correct IP address and connects to the genuine website securely.
This summarizes the normal and expected DNS behavior.
3. Spoofed DNS Flow (Attack Scenario)
The right half of the diagram is labeled:
SPOOFED DNS FLOW (Attack Scenario)
This section illustrates how attackers manipulate DNS responses to redirect users.
The color scheme shifts to red, immediately signaling danger and malicious activity.
3.1 Components Shown in the Attack Scenario
The following components are visible:
- User (Victim)
- Attacker (Man-in-the-Middle)
- Legitimate DNS Server
- Malicious Website (Fake example.com)
The attacker is visually placed between the user and the DNS server, representing interception.
3.2 Step-by-Step Spoofed DNS Flow
Step 1: DNS Query
1. DNS Query (example.com)
Just like in the normal flow, the user sends a DNS query.
However, this time the request is intercepted by the attacker.
Step 2: Fake IP Response
2. Fake IP Response (9.9.9.9)
Instead of waiting for the legitimate DNS server, the attacker responds first with a fake IP address.
A red dashed arrow shows this malicious response.
The diagram also shows a delayed real response from the legitimate DNS server, which arrives too late to be used.
Step 3: Connection to Malicious Website
3. Connects to (9.9.9.9)
The user unknowingly connects to the attacker-controlled IP address.
This leads to a malicious website designed to look like the real one.
Broken lock icons and warning visuals indicate compromised security.
3.3 Outcome of Spoofed DNS Flow
At the bottom of this section, the diagram states:
Attacker provides a fake IP address first, redirecting the user to a malicious site to steal data.
This highlights the core goal of DNS spoofing:
- Credential theft
- Data interception
- Malware delivery
4. Visual Comparison: Legitimate vs Spoofed DNS Flow
| Aspect | Normal DNS Flow | Spoofed DNS Flow |
|---|---|---|
| DNS Response | Correct IP | Fake IP |
| Middle Actor | None | Attacker |
| Destination | Legitimate Website | Malicious Website |
| Security | Secure Connection | Compromised |
5. Why DNS Spoofing Is Dangerous
DNS spoofing is particularly dangerous because:
- The URL in the browser may look correct
- The attack happens before a website loads
- Users often cannot detect the attack visually
The diagram clearly shows that trust is broken before the user ever reaches a website. <
