Improving Web Application Security: Threats and - CGISecurity

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590 Part IV: Securing Your Network, Host, and ApplicationIn addition, Windows Server 2003 provides process isolation through InternetInformation Services 6.0 (IIS 6) application pools that enable multiple applications torun in separate IIS worker process instances. Process isolation is not possible onWindows 2000 because all Web applications run in a single instance of the ASP.NETworker process, with application domains providing isolation.The Table 20.1 summarizes the various options for application isolation that areavailable on Windows 2000 and Windows Server 2003.Table 20.1 Application Isolation Features for Windows 2000 and Windows Server 2003Isolation Feature Windows 2000 Windows Server 2003Process isolation No Yes (IIS 6 App Pools)Application domain isolation Yes YesMultiple thread identities Yes YesCode access security resourceconstraintYes(.NET Framework version 1.1)Yes(.NET Framework version 1.1)Windows Server 2003 running version 1.1 of the .NET Framework is therecommended platform for hosting multiple ASP.NET applications because itsupports process isolation and provides the richest range of options for applicationisolation.
Chapter 20: Hosting Multiple Web Applications 591ASP.NET Architecture on Windows 2000On Windows 2000, multiple Web applications run in a single instance of the ASP.NETworker process (Aspnet_wp.exe). Each application resides in its own applicationdomain that provides a degree of isolation for managed code. The Windows 2000/IIS5 architecture is shown in Figure 20.1.IIS(inetinfo.exe)aspnet_filter.dllaspnet_isapi.dllRuns asSYSTEMNamed PipeRuns asASPNETASP.NET StateService(aspnet_state.exe)Runs asASPNETASP.NETWorker Process(aspnet_wp.exe)Web App1Web App1ApplicationDomainsFigure 20.1ASP.NET architecture on Windows 2000 with IIS 5
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Contents xxvii.NET Remoting Securit
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Contents xxixStaying Secure (contin
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Contents xxxiASP.NET Architecture o
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Contents xxxiiiSummary ............
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Contents xxxvIndex of Checklists 68
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Contents xxxviiChecklistSecuring Da
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Contents xxxixHow ToIndex 743How To
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Contents xliRestricting Server-to-S
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ForewordsForeword by Mark CurpheyWh
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Forewords xlvForeword by Joel Scamb
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Forewords xlviiFinally, techniques
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Fast Track — How To Implementthe
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Part IIntroduction to Threats andCo
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3Threat ModelingIn This Chapter●
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Chapter 3: Threat Modeling 47Threat
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Part IIDesigning SecureWeb Applicat
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Part IIIBuilding Secure WebApplicat
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8Code Access Security in PracticeIn
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11Building Secure ServicedComponent
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Part IVSecuring Your Network,Host,
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18Securing Your Database ServerIn T
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22Deployment ReviewIn This Chapter
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Related Security ResourcesRelated M
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How To:Harden the TCP/IP StackAppli
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How To:Use IPSec for Filtering Port
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How To:Use URLScanApplies ToSummary
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patterns & practicesProven practice
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