Does Muse Proxy work with a Cloudflare secured site?
To make sure Muse Proxy rewrites a website protected by Cloudflare the most reliable way is for the publisher to list the outbound IP address at Cloudflare. This is a must especially if the Cloduflare challenge is set to Interactive Challenge (the captcha-like one).
For publishers not intending to support rewriting proxies, if the publisher site is set up with a non-interactive JS challenge, then the Muse Proxy source profile can be configured using a base64 filter:
<PATTERNS>Use corresponding URL patterns here</PATTERNS>
<REPLACE base64="true" rewrite="1"><![CDATA["$1",]]></REPLACE>
Also some Cloudflare cases may require the following profile settings