DNS Hijacking is an attack where the attacker takes control of the victim's DNS (Domain Name System) settings, redirecting traffic to malicious websites or intercepting data. This attack can lead to significant security and privacy issues for users and organizations.

How DNS Hijacking Works

DNS hijacking involves manipulating the DNS settings of a victim's device or DNS server. By altering the DNS records, the attacker can redirect legitimate traffic to malicious websites, capture sensitive information, or disrupt normal internet usage.

Types of DNS Hijacking

• Local DNS Hijacking: Malicious software on a user's device changes the local DNS settings, redirecting traffic to malicious sites.
• Router DNS Hijacking: Attackers compromise a router's DNS settings, affecting all devices connected to the network.
• Man-in-the-Middle DNS Hijacking: Attackers intercept and alter DNS requests between the user and the DNS server.
• DNS Server Hijacking: Attackers gain control of a DNS server and change the DNS records to redirect traffic from multiple users.

Consequences of DNS Hijacking

• Phishing Attacks: Users are redirected to fake websites designed to steal login credentials and personal information.
• Malware Distribution: Redirected traffic can lead to websites hosting malware, resulting in further infections.
• Data Interception: Attackers can intercept and capture sensitive data, such as financial information and login credentials.
• Service Disruption: Legitimate services may become inaccessible, causing inconvenience and potential financial loss.

Protection Against DNS Hijacking

• Use Secure DNS Services: Choose reputable DNS providers that offer security features and protection against DNS hijacking.
• Regularly Update Firmware: Keep routers and devices updated with the latest firmware to patch vulnerabilities.
• Implement DNSSEC: Use DNS Security Extensions (DNSSEC) to ensure the authenticity and integrity of DNS responses.
• Monitor DNS Settings: Regularly check and monitor DNS settings on devices and networks for unauthorized changes.
• Use Antivirus and Anti-Malware: Protect devices with up-to-date security software to detect and prevent malware that can change DNS settings.