#Cloudflare is changing text in the page (+ display html as plain text)

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tight pasture
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So i have setup a traefik middleware for my error pages and when the error page is though Cloudflare it just display the page as plain text.

I did a compare on both CF proxied and not proxied, and some text where changed inside the response body.

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left is non proxy,
right is proxied

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also to test i disabled the cache but no

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Cloudflare is changing text in the page (+ display html as plain text)

tight pasture
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adding a html response header fix the problem

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but WHY does this happen ?
and is there something else than editing the CF response headers ?

tight pasture
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(also if you ask, no in the non-proxied page i don't have any content-type and it works)

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looking for more elements your x-content-type-options header is the cause

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is there a way to remove it (other than rules) ?

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if no i will stick on rules but if there is an option to remove it globally that would be perfect

dusty idol
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that header isn't on by default, you enabled something to add it

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Enabling the Managed Transform Add Security Headers (Rules -> Transform Rules -> Managed Transform -> Add Security Headers) would add it, for example

tight pasture
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maybe in other security things

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Security > Settings

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dusty idol
tight pasture
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oh that a cool thing, let me try it

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on what i see it hits the default ruleset and my test rule
(for the cache i'm in dev mode so it should not count)

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dusty idol
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you don't see this response header being returned from your origin at all?

tight pasture
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i just see the response code (200)

dusty idol
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yea it doesn't show you headers/make an origin request

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I mean if you bypass the proxy and see the request headers

tight pasture
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when i bypass this is the response headers

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and request headers (i just hidded the :authority:)

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