By default, if the range of ports to be scanned is not stipulated, Nmap scans the top 1,000 most commonly used ports, that is, ports that are found open most often across networks. These scan options allow the user to specify which ports are to be scanned and the order in which they are to be scanned.
- Title Page
- Copyright and Credits
- About Packt
- Contributors
- Preface
- Introduction to Network Vulnerability Scanning
- Understanding Network Scanning Tools
- Port Scanning
- Vulnerability Scanning
- Configuration Audits
- Report Analysis and Confirmation
- Understanding the Customization and Optimization of Nessus and Nmap
- Network Scanning for IoT, SCADA/ICS
- Vulnerability Management Governance
- Setting Up the Assessment Environment
- Security Assessment Prerequisites
- Target scoping and planning
- Gathering requirements
- Deciding upon the type of vulnerability assessment
- Estimating the resources and deliverables
- Preparing a test plan
- Getting approval and signing NDAs
- Summary
- Information Gathering
- Enumeration and Vulnerability Assessment
- Gaining Network Access
- Assessing Web Application Security
- Privilege Escalation
- Maintaining Access and Clearing Tracks
- Vulnerability Scoring
- Threat Modeling
- Patching and Security Hardening
- Vulnerability Reporting and Metrics
- Importance of reporting
- Type of reports
- Reporting tools
- Collaborative vulnerability management with Faraday v2.6
- Metrics
- Mean time to detect
- Mean time to resolve
- Scanner coverage
- Scan frequency by asset group
- Number of open critical/high vulnerabilities
- Average risk by BU, asset group, and so on
- Number of exceptions granted
- Vulnerability reopen rate
- Percentage of systems with no open high/critical vulnerability
- Vulnerability ageing
- Summary
- Other Books You May Enjoy
Port specification and scan order
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