But it continues to cost companies and has seen hackers invest more time and effort developing tools. DNS tunneling has been around for a while. Most organizations have a firewall that acts as a filter between their sensitive internal networks and the threatening global Internet. Into the Cryptoverse - The Intersection of Cryptocurrency and Cybersecurityīy: Ron Lifinski, Cyber Security Researcher DNS Tunneling.Recent Microsoft Vulnerabilities Overview.Microsoft MSHTML Remote Code Execution Vulnerability.