Defensive security is a subset of cybersecurity that focuses on protecting an organization's systems and networks from attack. It is a proactive approach to cybersecurity that involves identifying and mitigating security vulnerabilities, implementing security controls, and monitoring for suspicious activity.

Blue teams use a variety of tools and techniques to defend an organization's systems and networks, including:

• Security information and event management (SIEM): SIEM tools collect and analyze log data from across an organization's network to identify suspicious activity.

• Intrusion detection and prevention systems (IDS/IPS): IDS/IPS systems monitor network traffic for malicious activity and can block or alert on suspicious traffic.

• Firewalls: Firewalls filter network traffic to block unauthorized access to an organization's systems and networks.

• Vulnerability scanners: Vulnerability scanners identify security vulnerabilities in an organization's systems and networks.

• Security orchestration, automation, and response (SOAR): SOAR platforms automate security tasks, such as incident response and vulnerability remediation.