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Force periodic password changes: After a certain time, passwords will become less secret than they originally were since users will eventually tell other users what their passwords are For this reason, Novell provides an option to force periodic password changes By default, the password must be changed every 40 days In general, this is a reasonable amount of days for a forced password change (although many users will think it s way too short!) Be aware that if you force users to change their password too often, they won t take it seriously anymore and will choose passwords that are easy to guess for example, they may choose their previous password except with a 1 on the end After selecting Force Periodic Password Changes, the Date Password Expires option becomes available as well This lists when the current password will expire.

One of the biggest advantages of XP is that it stresses high quality through up-front testing This happens with both test-driven development and acceptance testing What really makes this practice worthwhile is that it doesn t wait until the end of development to create or even run the tests Test-Driven Development and Unit Tests Test-driven development (TDD) promotes the writing of tests prior to writing the code that is being tested This allows you to focus on your interface and what you expect from your code prior to focusing on its particular implementation The testing components for implementing a test-driven development plan are known as unit tests Unit tests are small pieces of code that are written to exercise autonomous units of your implemented classes When developing these tests, you usually focus on the public interfaces of your classes A common test-driven development sequence looks something like the following: 1.

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The NOT Exists (SQL query returns no rows) condition type, as you can guess from the name, is the inverse of the Exists (SQL query returns at least one row) condition type. In this case, if the query returns a single row (or more), the overall result of the condition is deemed to be false, and the element will not be displayed and/or processed.

If a password is set by an administrator, the password expiration date is automatically set to the present day This forces the user to enter a new password the first time he logs in Require unique passwords: This option forces a user to choose a password he hasn t previously used eDirectory remembers the last 20 passwords used Limit grace login: A grace login is when a user is allowed use of his old password even though she should have already specified a new password By default, a user has six grace logins When the password expiration date occurs, the user gets a message stating that she should change her password, and if she wants to change it now (see Figure 9-3) In the last grace login, the user gets a message that she must enter her new password now, followed by a prompt to enter her new passwords.

column into the href, so that when the default mail client launches, it generates a new e-mail message and uses the value of the REPORTED_EMAIL column as the e-mail address to which to send the message By using the REPORTED_FULL_NAME column value inside the HTML anchor, the text that is displayed for the link is the user s full name, rather than the login username, which you would have gotten if you had used #REPORTED_BY# instead But why use the REPORTED_BY column here, when it isn t actually displayed in the report You could have just as easily shown the REPORTED_EMAIL column in the report, and used the same HTML expression to format it slightly differently Well, that is a good question Doing that would make it slightly less confusing when you return to this code in six months or so.

The feature of grace logins is useful, but can be confusing for end users since it doesn t force them to change the password immediately For this reason, many system administrators set the number of grace logins allowed to one This way, the user logs in once with her old password, but then must change it immediately..

Figure 9-3. When a user password expires, the user is asked if he wants to change it. Set password: This is an important option for help-desk employees, letting them reset the password for a user.

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