c# generate barcode image Part 7: Managing Active Directory and Security in Visual C#

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Part 7: Managing Active Directory and Security
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This setting is the number of minutes after a failure to log on before the logon counter is reset to zero. This must be less than or equal to the Account Lockout Duration setting if the Account Lockout Threshold policy is enabled.
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Kerberos is an authentication system designed for secure exchange of information as discussed in the section entitled NTLM and Kerberos Authentication on page 1120. Windows Server 2003 has five settings for Kerberos Policy, which are applied only to domain user accounts. The policies are located in Computer Configuration\Windows Settings\Security Settings\Account Policies\Kerberos Policy. They are as follows:
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If you want to validate every ticket session request against the user rights, keep the default setting enabled. The default is 600 minutes, but this setting must be greater than 10 minutes, and also must be less than or equal to what is configured for the Maximum Lifetime For User Ticket setting. The setting does not apply to sessions that have already been validated. This is different from the Maximum Lifetime For Service Ticket setting. Maximum Lifetime For User Ticket sets the maximum amount of time that a ticket may be used before either a new one must be requested or the existing one is renewed, whereas the Maximum Lifetime For Service Ticket setting is used to access a particular service. The default is 10 hours. This user account security policy object configures the maximum amount of time the ticket may be used. The default is seven days. Sometimes workstations and servers have different local clock times. This setting allows you to configure a tolerance level (defaults to 5 minutes) for this possible difference so that Kerberos authentication does not fail.
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Maximum Lifetime For User Ticket
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Note In Windows Server 2003 Standard and Enterprise editions using Active Directory with all Password Policies disabled, if you change the Minimum Password Length setting to less than seven characters (the default), you will not be able to create a new user or change a user s password. To work around this limitation, set the password length to seven or higher.
37
This setting determines how many failed attempts at logon before a user will be locked out of the account. The range is from 0 to 999. If this setting is 0, the account will never be locked out and the Account Lockout Duration security setting is disabled. The default setting is 0.
Part 7: Managing Active Directory and Security
Microsoft Windows Server 2003 Inside Out
Understanding User Account Capabilities, Privileges, and Rights
37
All user accounts have specific capabilities, privileges, and rights. When you create a user account, you can grant the user specific capabilities by making the user a member of one or more groups. This gives the user the capabilities of these groups. You then assign additional capabilities by making a user a member of the appropriate groups or withdraw capabilities by removing a user from a group. In Windows Server 2003, some capabilities of accounts are built in. The built-in capabilities of accounts are assigned to groups and include the group s automatic capabilities. Although built-in capabilities are predefined and unchangeable, they can be granted to users by making them members of the appropriate group or delegated by granting the capability specifically, for example, the ability to create, delete, and manage user accounts. This capability is assigned to administrators and account operators. Thus, if a user is a member of the Administrators group, the user can create, delete, and manage user accounts. Other capabilities of accounts, such as permissions, privileges and logon rights, can be assigned. The access permissions for accounts define the operations that can be performed on network resources. For example, permissions control whether a user can access a particular shared folder. You can assign access permissions to users, computers, and groups as discussed in 21, File Sharing and Security. The privileges of an account grant permissions to perform specific tasks, such as the ability to change the system time. The logon rights of an account grant logon permissions, such as the ability to log on locally to a server. An important part of an administrator s job is being able to determine and set permissions, privileges, and logon rights as necessary. Although you can t change a group s built-in capabilities, you can change a group s default privileges and logon rights. For example, you could revoke network access to a computer by removing a group s right to access the computer from the network. Table 37-1 provides an overview of the default privileges assigned to groups. Table 37-2 provides an overview of the default logon rights assigned to groups.
Table 37-1.
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