Detecting DNS Tunneling Attacks

What is DNS Tunneling?

DNS Tunneling is a strategy for a digital exploit that encodes the information of different programs or protocols in DNS inquiries and responses. DNS tunneling frequently incorporates information payloads that can be added to an exploited domain name server and used to control a distant system and applications. Normally, DNS tunneling requires the undermined framework to have outside organization availability, as DNS tunneling expects admittance to an interior DNS server with network access. Hackers should likewise control a system that can go about as a definitive server to execute the server-side tunneling and information payload executable programs....

How Does DNS Tunneling Work?

DNS tunneling works by encapsulating data in DNS queries and responses to create an encrypted communication channel between a corrupt machine and an attacker-controlled remote server. The malware on the infected device converts data into subdomains of DNS queries, which are subsequently forwarded to the attacker’s DNS server. This server decodes the data and can return commands encoded in DNS replies. Because DNS traffic is often permitted to travel through firewalls and security devices without being thoroughly examined, DNS tunneling allows the attacker to avoid security measures, steal data, and maintain command and control over the infected system....

Detecting DNS Tunneling Attacks

Analyzing DNS Traffic Patterns Unusual Domain Requests High DNS Traffic Volume Intrusion Detection Systems (IDS) DNS Monitoring Utilities...

How to Protect Against DNS Tunneling?

Use DNS Filtering Monitor DNS Traffic Deep Packet Inspection (DPI) Network Segmentation Access Controls Use Antivirus and Anti-Malware Use Intrusion Detection System Use Intrusion Prevention System...

Conclusion

DNS tunneling is a process where an attacker encodes data in DNS queries and responses to communicate between a compromised system and a remote server. Using DNS tunneling attackers can establish a communication route between a hacked system and a remote server they control. DNS Tunneling enables them to steal data, run commands, and keep permanent control over infected systems....

Frequently Asked Questions on DNS Tunneling – FAQs

What tools are there to detect DNS tunneling?...