Use Image Captcha from XenVn add-on for better performance. Users need to enter exactly 9 numbers in the image to verify.
Advantages:
- Runs on the system, does not use third-party services
- Good performance
- No connection timeout / refused errors,...
- Simple, user-friendly
- Anti-bot, anti-flooding algorithm
- Click on captcha image to refresh
- Automatically refresh captcha images on a timed cycle
Verification security is not as high as third-party Captchas: hCaptcha, Cloudflare Turnstile, reCAPTCHA.
Note:
Before disabling / uninstalling XenVn add-on, please uncheck this option.
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