Improving Web Application Security: Threats and - CGISecurity

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540 Part IV: Securing Your Network, Host and ApplicationConfigure Terminal Services Use the Terminal Services configuration MMC snap-in available from the AdministrativeTools program group to configure the following1. There are three levels (Low, Medium, and High) of encryption available forconnections to Terminal Services. Set the encryption to 128-bit key. Note that theWindows high encryption pack should be installed on both the server and theclient.2. Configure the Terminal Services session to disconnect after idle connection timelimit. Set it to end a disconnected session. A session is considered to bedisconnected if the user closes the Terminal Services client application withoutlogging off in a period of 10 minutes.3. Finally, restrict permissions to access Terminal Services. Use the RDP permissionstab in the RDP dialog box. By default, all members of the Administrators groupare allowed to access Terminal Services. If you do not want all members of theAdministrators group to access Terminal Services, remove the group and addindividual accounts that need access. Note that the SYSTEM account must be inthe list.Use a secure VPN connection between the client and the server or an IPSec tunnel forenhanced security. This approach provides mutual authentication and the RDSpayload is encrypted.Copying Files over RDPTerminal Services does not provide built-in support for file transfer. However, youcan install the File Copy utility from the Windows 2000 Server Resource Kit to addfile transfer functionality to the clipboard redirection feature in Terminal Services.For more information about the utility and installation instructions, see MicrosoftKnowledge Base article 244732, “How To: Install the File Copy Tool Included with theWindows 2000 Resource Kit.”SummaryDatabase servers are a prime target for attackers. The database server must besecured against internal, external, network level, and application level attacks. Asecure database server includes a hardened SQL Server 2000 installation on top of ahardened Windows 2000 installation, coupled with secure network defensesprovided by routers and firewalls.For a quick reference checklist, see “Checklist: Securing Your Database Server” in the“Checklists” section of this guide.
Chapter 18: Securing Your Database Server 541Additional ResourcesFor more information about SQL Server security, see the following resources:●●●●●Microsoft SQL Server Security home page: http://www.microsoft.com/sql/techinfo/administration/2000/security.asp.SQL Server 2000 Resource Kit CD, Chapter 10 — Implementing Security:http://www.microsoft.com/technet/prodtechnol/sql/reskit/sql2000/part3/c1061.asp.“SQL Server 2000 Security,” by Richard Waymire and Ben Thomas:http://www.microsoft.com/technet/treeview/default.asp?url=/technet/prodtechnol/sql/maintain/security/sql2ksec.asp.For information about changing the SQL Server service account, see MicrosoftKnowledge Base article 283811, “How To: Change the SQL Server Service AccountWithout Using SQL Enterprise Manager in SQL Server 2000.”For information about SQL Server auditing, see the TechNet article, “SQL Server2000 Auditing,” by John Howie, at http://www.microsoft.com/technet/treeview/default.asp?url=/technet/security/prodtech/dbsql/sql2kaud.asp?frame=true.
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ForewordsForeword by Mark CurpheyWh
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Part IIntroduction to Threats andCo
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3Threat ModelingIn This Chapter●
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