A policy banner is a window that you can display before the login page that requires a user to acknowledge it before proceeding. The policy banner can display a longer message than the login banner on the login page to inform users of the usage policies, help deter unauthorized use, aid in the prosecution against attackers, and meet the requirement for CIS (Center for Internet Security) benchmark and other security standards.
Step 1: Create a text document (using TextEdit) with the information you wish to display at the login window.
You can use either a Plain Text File (.txt) or Rich Text Format (.rtf)
Step 2: Save this file with the exact title ‘PolicyBanner’ to your Desktop. (The document MUST be titled exactly ‘PolicyBanner’ as one word, with a capital ‘P’ and ’B’ with NO space between the 2 words). For example PolicyBanner.txt or PolicyBanner.rtf.
Step 3: Copy the PolicyBanner file to SYSVOL > (yourdomain) directory on your domain controller.
Step 4. Enable the group policy setting: Computer Configuration > Policies > Centrify Settings > Common UNIX Settings > Copy files
Step 5. Click Add, then Browse to the PolicyBanner file on your SYSVOL > (your domain) directory. Enter "/Library/Security" without quotes into the Destination field, then click OK.
The policy banner window will appear after the next group policy interval and logout.
Other settings to consider:
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