Overwrite "sec-websocket-key" (3 replies)

Hi everyone,

Could someone help us with some info on how to rewrite a request header
before its passed to the backend servers?

Trying

http-request add-header sec-websocket-key abc123

or

reqadd sec-websocket-key:\ abc123

Does not work the key remains the same as it was in the original request.

Thanks in advance for any help available

Tom