Cyberdudebivash

        DNS Tunneling: The Covert Channel Attack that Bypasses Firewalls for C2 and Data Exfiltration     By CyberDudeBivash • October 01, 2025, 10:27 AM IST • Threat Analysis & Defense Guide   Your organization spends millions on next-generation firewalls, intrusion prevention systems, and web gateways. Yet, attackers are strolling right past these defenses using a protocol that's been a fundamental part of the internet for 40 years: DNS. By hiding their malicious communications inside what looks like normal DNS traffic, advanced threat actors create a **covert channel** that is effectively invisible to most security stacks. This technique, known as **DNS Tunneling**, is a go-to method for stealthy command-and-control (C2) and slow, methodical data exfiltration. If you aren't actively monitoring your DNS traffic for anomalies, your firewall is little more than a decoration. This guide will break down exactly how DNS tunneling works and the...