Challenge Passage, Captcha and Privacy Pass Support are three different features:
** Useful for ensuring that the visitor accessing the site is human, not automated
** The client that made the request must pass a Captcha Challenge.
** If successful, Cloudflare accepts the matched request; otherwise, it is blocked.
Privacy Pass Support: Privacy Pass is a browser extension developed by the Privacy Pass Team to improve the browsing experience for your visitors. Enabling Privacy Pass will reduce the number of CAPTCHAs shown to your visitors.
I added a page rule to apply high security to a customized login page and didnt enable captcha.
So, do Privacy Pass Support still help ? i am not sure if it has things to do with Challenge Passage or it is only for captcha ?
I assume that you want to protect your login page from a brute force attack mainly. You still need to create a Firewall Rule and challenge /login path.
Also, Rate Limiting feature is also useful to protect your login page from brute-force attempts. For more details, please check: Configuring Cloudflare Rate Limiting – Cloudflare Help Center