Cachebuster in the User-Agent headers causes CloudFlare 403 block

[m0pam]

Param miner automatically adds a cache buster to the user-agent, this gets blocked by CloudFlare. I've attempted everything, please how can I stop this behaviour???

[albinowax]

For now, you could potentially work around this using the 'Add custom header' extension.

[99smith]

Hi @albinowax

I tried using 'Add custom header' extension to solve this issue but it is just adding extra useragent header at the bottom of request which defeats the whole purpose as again we get 403 or 429 status. request like below:

`POST /magic-login HTTP/2 Host: xyz.com Cookie: a=dde9a3d5-1899-4452-80e4-0f0159433ed6-p; User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:109.0) Gecko/20100101 Firefox/111.0 Accept: application/json Accept-Language: en-GB,en;q=0.5 Accept-Encoding: gzip, deflate X-Requested-With: XMLHttpRequest Content-Type: application/json Content-Length: 31 Origin: https://quizlet.com Sec-Fetch-Dest: empty Sec-Fetch-Mode: cors Sec-Fetch-Site: same-origin Te: trailers Cookie: _gat_UA-1203987-1=1 User-Agent: Mozilla/5.0 Superman

{"username":"jhbj"}`

[AkikoOrenji]

@99smith use Reshaper for this. It can rewrite anything on the fly using When & Then rules. Often you don't even need regex to use the Reshaper so i'd highly recommend it.

[albinowax]

I fixed this a while ago by adding the misc header cachebusters setting but forgot to close the issue.