Lesson 1: Maintaining a Server-Level Security Strategy in Visual Basic .NET

Making QR-Code in Visual Basic .NET Lesson 1: Maintaining a Server-Level Security Strategy

Lesson 1: Maintaining a Server-Level Security Strategy
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Lesson 1: Maintaining a Server-Level Security Strategy
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This lesson discusses the guidelines for implementing server-level security by using various authentication methods, and it explains the requirements for developing a server-level security policy. It also discusses the guidelines for creating a password policy and determining service account permissions. It explains how to select an appropriate encryption method to develop a secure communication policy, how to design a strategy to apply service packs and security updates, and how to use Surface Area Configuration Manager to minimize the exposed surface area.
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After this lesson, you will be able to:
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Specify and audit Windows account permissions. Audit SQL Server service access. Ensure that SQL Server 2005 service accounts have the minimum required permissions. Maintain an encryption strategy that meets business needs. Design a strategy to evaluate and apply service packs and security updates. Configure the surface area of a SQL Server 2005 server.
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Estimated lesson time: 75 minutes
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Specifying and Auditing Windows Account Permissions
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SQL Server 2005 supports both Windows and Mixed authentication modes. In Windows authentication mode, access is based on a security token assigned during successful domain (or local server) login by a Windows account, which subsequently requests access to SQL Server resources. In other words, Windows authentication mode enables users to access SQL Server using their Windows user accounts. The Mixed authentication mode allows both Windows and SQL Server authentication. SQL Server authentication relies on the verification of credentials that are stored and maintained by the SQL Server. With SQL Server authentication, users can log in using an account that you create and manage within SQL Server.
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NOTE
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Service packs
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The service pack level at the time of writing this book is Service Pack 1 (SP1). Unless otherwise indicated, all the information in the chapter applies to both SQL Server 2005 and SQL Server 2005 SP1.
11
Security Strategies
SQL Server 2005 introduces the facility to manage SQL Server account password and lockout properties with local and domain-based group policies. If you install SQL Server 2005 on a server running Windows Server 2003 (Enterprise Edition or above), SQL Server can use Windows security policies for SQL Server authentication. This enforces restrictions on the Windows password policy, which must be at least as stringent as the SQL Server 2005 password policy for user accounts (including service and application accounts) that require access to SQL Server 2005. When you configure SQL Server to enforce Windows password policies on a SQL login identity (ID), the password must meet the following criteria:
The password length must be at least six characters long. The password must contain at least three out of the four character types. Character types are uppercase alphabetic, lowercase alphabetic, numeric, and nonalphanumeric characters. The password cannot match any of the values: Admin , Administrator , Password , sa , or sysadmin ; or the name of the computer hosting SQL Server; or all or part of the name of the currently logged on Windows account. Part of an account name is defined as three or more consecutive alphanumeric characters delimited on both ends by white space (a space, tab, return, and so on) or any of the following characters: , - or _# .
SQL password restrictions and strong Windows passwords
NOTE
The SQL restrictions listed are not particularly restrictive if you are using strong Windows passwords that need to be at least seven characters long and conform to complexity requirements. If complexity requirements are met, you can use strings such as sa or Password in passwords. For example, Password&7 and saLT&pepper are valid passwords. However, if Windows complexity requirements are disabled or computers that run other operating systems (for example, UNIX) require access to your databases, the password restrictions for SQL Server login apply.
Quick Check
1. 2. 1. 2. Why is the password letmein22 invalid for the user account Kim_Akers Why is the password BaL00 invalid for the user account Kim_Akers The password contains only two character types: numeric and lowercase alphabetic. It should contain at least three. The password is too short.
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