Protected headers

Protected headers have special meaning in HTTP/1.1. Modifying these headers can cause problems. VCL that attempts to modify these headers will fail to compile.

  • Content-Length
  • Content-Range
  • Expect
  • Fastly-FF
  • Proxy-Authenticate
  • Proxy-Authorization
  • TE
  • Trailer
  • Transfer-encoding
  • Upgrade
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