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Talk:CORS OriginHeaderScrutiny

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what does "protract allowed domain guessing" mean?

I don't understand what this is trying to say - "It's the browser (or others tools) that send the HTTP request then the IP address that we have access to is the client IP address"

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The original state of this article was mostly nonsense and I'm not surprised it had been "flagged for review". The correct recommendation can be summarized as:

  • Don't trust the Origin header
  • Do your own authentication

All that stuff about trying to guess if the Origin header can be trusted was not only overly-complicated but is bad in practice. You can never trust the Origin header. Ever. Everything in an HTTP request can be crafted to say anything outside of a browser. The recommendations that existed here were essentially "make sure they fake it well".

Collin Sauve (talk) 14:09, 25 February 2019 (CST)