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The calling router must have a valid computer certificate installed that was issued by a CA that follows a valid certificate chain from the issuing CA up to a root CA that the answering router trusts. Additionally, the answering router must have a valid computer certificate installed that was issued by a CA that follows a valid certificate chain from the issuing CA up to a root CA that the calling router trusts. By default, site-to-site L2TP/IPSec connections require that the calling and answering routers exchange computer certificates for IPSec peer authentica tion. Check the Local Computer certificate stores of both the calling and answering routers using the Certificates snap-in to ensure that a suitable cer tificate exists.

Marketing folder. However, he can access the webpages from a shared folder, because NTFS permissions grant him access. Only ASP.NET blocks access.

<configuration> <system.web> <authentication mode="Windows" /> <authorization> <deny users=" " /> </authorization> </system.web>

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The query is expected to return a single row. Some .NET data providers might use this information to optimize the operation of the query. Note that in many cases, using a stored procedure with output parameters will result in better performance for singleton queries. CommandBehavior.CloseConnection is the perfect parameter to pass in this situation because the OleDbConnection object is created using a local parameter. When Page_Unload is called, closing dr will close the connection it was using. There are other convenient ways of working around closing the connection for example, making the OleDbConnection object a public class variable. In other situations for example, when a class method returns a data reader it might not be as easy to get the connection closed without sending CommandBehavior.CloseConnection to ExecuteReader. To give a concrete example, say you have an Customer object that exposes a method GetCustomer that returns a data reader. Having that method call ExecuteReader with CommandBehavior.CloseConnection means that the connection, allocated and opened in GetCustomer, will be closed when the data reader is closed, even though you have no access to the connection object that GetCustomer created.

If either the calling or answering router is running Windows 2000 Server and there is a NAT between the calling and answering router, you cannot estab lish an L2TP/IPSec connection because NAT-traversal (NAT-T) is not supported in Windows 2000 Server. IPSec NAT-T is supported only by Windows Server 2003 for site-to-site VPN connections.

<location path="IT"> <system.web> <authorization> <allow roles="SOUTHRIDGE\IT" /> <deny users="*" /> </authorization> </system.web> </location> <location path="Production"> <system.web> <authorization> <allow roles="SOUTHRIDGE\Production" /> <allow users="SOUTHRIDGE\TJensen" /> <deny users="*" /> </authorization> </system.web> </location> <location path="Sales"> <system.web> <authorization> <allow users="SOUTHRIDGE\TJensen" /> <deny users="*" /> </authorization> </system.web> </location> </configuration>

You also could have explicitly created a <location> section for the CustServ folder. However, because its permissions are identical to those of the parent folder, creating the <location> section is unnecessary.

You can use NTFS file permissions to further restrict access to the folders. This would provide multiple layers of protection, a security technique known as defense-in-depth.

If there is a firewall between the calling and answering router and you cannot establish an L2TP/IPSec connection, verify that the firewall allows L2TP/ IPSec traffic to be forwarded. For more information, see Appendix B, Configuring Firewalls for VPN. One of the best tools for troubleshooting IPSec authentication issues is the Oakley log. For more information, see the Oakley Logging section in 11. For a sample Oakley log, see the companion CD.

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Insert, update, and delete operations in SQL are sometimes called action queries, meaning that they perform some action rather than returning data. Within the ADO.NET world, they re also known as nonqueries. The code to execute these nonqueries is

You should use Windows authentication, because you need the user to provide Windows credentials that the application can use to access the file. You should configure the <authentication> and <authorization> sections as follows.

When Extensible Authentication Protocol-Transport Layer Security (EAP-TLS) is used for authentication, the calling router submits a Router (Offline request) user certificate and the authenticating server (the answering router or the RADIUS server) submits a computer certificate. Verify that the calling router and answering router are correctly configured. To do this, use the following steps: 1. On the calling router, verify that EAP is configured as the authentication pro tocol in the advanced security properties of the demand-dial interface. Verify the settings of the properties of the Smart Card Or Other Certificate (encryp tion-enabled) EAP type. Verify that the correct Router (Offline request) certif icate is selected when configuring the credentials of the demand-dial interface.

<configuration> <system.web> <authentication mode="Windows" /> <authorization> <deny users=" " /> </authentication> </system.web> </configuration>

need to create the controller, action method, view folder, and view according to convention. Answer A creates a controller and action method, but these do not match another answer in the list.

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