IBM Password Configuration and Rules Step by Step

Here is simple step by step to configure password in IBM system. The first thing you must have administrator-level privileges to define password rules. If you do not have administrator-level privileges, Password settings does not display in the in the Select Action drop-down menu of the User administration — Main page.

1. Under Monitor system, select User administration. In User administration — Main page, select Password settings in the Select Action drop-down box. The Password settings page is displayed.
2. Specify the number of days after that a password expires in the Password expires (days) field. An entry of 0 will result in passwords never expiring.
3. Specify the number logins after which no more attempts are allowed in the Failed logins allowed field. An entry of 0 will allow an unlimited number of attempts.
4. Click Ok. The password setting are immediately applied.

The password and its use must meet the following criteria:
- Be six to 16 characters long.
- Must contain five or more letters, and it must begin and end with a letter.
- Must contain one or more numbers.
- Cannot contain the user's user ID.
- Is case-sensitive.
- Four unique new passwords must be issued before an old password can be reused.
- Allowable characters are: a-z, A-Z, 0-9.

source:ibm.com