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Burp browser not loading a website behind cloudflare?

Mauro | Last updated: Jul 13, 2021 12:30PM UTC

Hi, I'm using Burp Pro 2021.7. I'm unsure if I'm doing something wrong, but today I wanted to play a bit with the new DOM invader. However, it seems that with embedded Burp browser I'm not even able to load the website I'm trying to access (the website loads perfectly fine when I navigate to it via e.g. Firefox with Burp proxy enabled). I tried disabling all extensions, but that didn't change a thing. https://i.imgur.com/XgaLZhN.png If really necessary, I can provide the actual website URL, but I reckon the same thing should happen with any other website that has "Checking your browser before accessing..." thingy. Any help is appreciated. Thanks, Mauro

Ben, PortSwigger Agent | Last updated: Jul 14, 2021 12:49PM UTC

Hi Mauro, If you use a Match and Replace rule (under Proxy -> Options -> Match and Replace) in order to change the User-Agent request header so that the string for Firefox is being used (there are some pre-populated rules for the User-Agent header within here so you could adapt one of them) does this allow the site to be proxied or do you still observe the same behaviour?

Mauro | Last updated: Jul 14, 2021 04:03PM UTC