Download Safari Books Online apps: Apple iOS | Android

Entire Site

Safari Books Online

    Free Trial

    Safari Books Online is a digital library providing on-demand subscription access to thousands of learning resources.


    • Create BookmarkCreate Bookmark
    • Create Note or TagCreate Note or Tag
    • DownloadDownload
    • PrintPrint
    Share this Page URL
    Help

    Chapter 9. Scanning the Horizon

    9. Scanning the Horizon

    Chapter Spotlight

    • Port scanning, vulnerability enumeration, topology mapping

    • Subnets and architectural protections; security perimeter

    • Firewalls: their purpose, design, and configurations

    • Network address translation

    Attack: Investigation, Intrusion, and Compromise369
    Threat: Port Scan370
    Attack Details371
    Harm: Knowledge and Exposure374
    Recurring Thread: Legal—Are Port Scans Legal?375
    Vulnerability: Revealing Too Much376
    Vulnerability: Allowing Internal Access376
    Countermeasure: System Architecture377
    Countermeasure: Firewall378
    Countermeasure: Network Address Translation (NAT)397
    Countermeasure: Security Perimeter399
    Conclusion400
    Exercises402



      

    You are currently reading a PREVIEW of this book.

                                                                                            

    Get instant access to over
    $1 million worth of books and videos.

      

    Start a Free Trial


      
    • Safari Books Online
    • Create BookmarkCreate Bookmark
    • Create Note or TagCreate Note or Tag
    • DownloadDownload
    • PrintPrint