Looking at https://en.wikipedia.org/wiki/List_of_HTTP_header_fields it
suggests it's a non-standard request header.

You can probably strip this out of the request to the real server with

proxy_set_header "Proxy-Connection" "";

Although I'd expect the backend server to ignore invalid request headers
rather than bork on the request.

Steve.

On 25/08/2015 21:03, Tyarko Leander Rodney wrote:
> Hi,
>
> I’ve posted this question on the IRC before but had no luck. I have the following problem:
>
> I’d like to disable the ‘Proxy-Connection’ Response Header. I know, that the “Connection” Header is hard coded in ngx_http_header_filter_module.c, but does the same apply to “Proxy-Connection” (couldn’t find it in the sources)?
>
> I’ve tried the more_clear_headers from the ngx_headers_more module and proxy_set_header(which both work fine with all other headers).
>
> Background: The ‘Proxy-Connection’ sadly violates our Server Policy (strict RFC21266 compliance).
>
> Kind regards
>
> T. Rodney
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>

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