Explore defensive cybersecurity strategies in this 39-minute conference talk by Mick Douglas, a pen tester for a bank. Delve into the need for re-evaluating current security practices, challenging the status quo of anti-virus software and firewalls. Learn about the limitations of silver bullet solutions and the importance of hardening systems. Discover the power of knowledge and tools like Nmap for effective defense. Gain insights on database security, rootkit detection, and future trends in blue team tactics. Connect with the speaker for further discussion on enhancing your organization's cybersecurity posture.