Objective
CAPTCHA stands for Completely Automated Public Turing test to tell Computers and Humans Apart. Login CAPTCHA serves as a security measure against bot-based brute- force attacks.
You can configure whether to show CAPTCHA always or after a certain number of invalid login attempts. Apart from the CAPTCHA image, you can also enable Audio CAPTCHA. This article focuses on how to enable CAPTCHA
Prerequisites
You will need to have admin access to the EventLog Analyzer console.
Steps to follow
Step 1: Open EventLog Analyzer console/UI and navigate to the below path
Settings → Admin Settings → Logon Settings -> General.
Step 2: Select the Enable CAPTCHA on the login page checkbox.

Step 3: Once enabled, you will have two options,
Option 1: Always show CAPTCHA
Select "Always show CAPTCHA", if you want users to go through CAPTCHA verification every time they login.
Option 2: Show CAPTCHA after invalid login attempts
Select "Show CAPTCHA after invalid login attempts" if you want only those users who failed at login to go through the CAPTCHA verification process.
Enter the number of invalid login attempts after which the CAPTCHA verification should appear.
Enter the threshold (in minutes) to reset the invalid login attempts. After the specified duration, the invalid login attempts will be reset.
Step 4: Select Enable Audio CAPTCHA to assist visually impaired users.
Note: When Audio CAPTCHA is enabled, only digits will be shown in the CAPTCHA image. If a browser doesn't support audio CAPTCHA, then the default CAPTCHA image (with letters and digits) will be shown.
Step 5: Click Save Settings.
Tips
- Enable CAPTCHA and other logon settings to ensure multi-layer protection from cyberthreats.
- How to restrict access to EventLog Analyzer user interface