Network & Packet Sniffers
Tools to analyze network traffic:

• Wireshark – Industry-standard network protocol analyzer.
• Tcpdump – Command-line packet analyzer for Unix/Linux.
• Ettercap – Network security tool for man-in-the-middle attacks.
• Snoop – Solaris-based packet capture tool.
• Nmap – Network scanning and vulnerability detection.
• TShark – Command-line version of Wireshark.
• Suricata – Intrusion detection and prevention system (IDS/IPS).
• Zeek (Bro) – Network security monitoring framework.

Penetration Testing Tools
Tools for ethical hacking and security assessments:

• Metasploit – Comprehensive penetration testing framework.
• Burp Suite – Web security testing tool.
• Nikto – Web server vulnerability scanner.
• SQLmap – Automated SQL injection testing tool.
• John the Ripper – Password cracking tool.
• Aircrack-ng – Wireless security auditing tool.
• ExploitDB – Database of known exploits.

Intrusion Detection & Prevention Systems (IDS/IPS)
Tools to detect and mitigate security threats:

• Snort – Open-source IDS/IPS.
• Suricata – High-performance IDS/IPS.
• OSSEC – Host-based intrusion detection system.
• Fail2Ban – Prevents brute-force attacks by banning IPs.
• Security Onion – Comprehensive security monitoring platform.

Security Compliance & Standards
Organizations and frameworks - security best practices:

• ISO/IEC 27001 – International standard for information security management.
• NIST Cybersecurity Framework – Guidelines for improving security posture.
• CIS Benchmarks – Security configuration guidelines.
• OWASP – Web application security standards.
• PCI DSS – Payment security compliance.
• SOC 2 – Security compliance for service providers.
• GDPR – Data protection regulations in the EU.

Security Auditing & Testing Sites
Platforms to assess security risks:

• Shodan – Search engine for exposed devices.
• VirusTotal – Malware scanning and analysis.
• Qualys – Cloud-based security assessment.
• Tenable Nessus – Vulnerability scanner.
• Rapid7 InsightVM – Risk-based vulnerability management.
• OpenVAS – Open-source vulnerability scanner.

Application Security Testing
Tools for securing applications:

• OWASP ZAP – Web application security scanner.
• SonarQube – Code quality and security analysis.
• Checkmarx – Static application security testing (SAST).
• Veracode – Automated security testing for applications.
• Burp Suite – Web security testing.

Endpoint Security & Antivirus
Protect individual devices from threats:

• CrowdStrike Falcon – AI-driven endpoint protection.
• Microsoft Defender – Built-in Windows security.
• Bitdefender – Advanced threat protection.
• ESET Security – Lightweight antivirus solution.
• Kaspersky Endpoint Security – Enterprise-grade protection.