Hello, i'm having trouble understanding the configuration of nginx with a fastcgi backend (php-fpm) when large headers are being returned from my application into Firebug.

Could someone help explain the usage of the following configuration options:

client_header_buffer_size
large_client_header_buffers
fastcgi_buffers
fastcgi_buffer_size
(and is there an undocumented fastcgi_busy_buffer_size?)

Ideally i would like all headers to be passed through from fastcgi backend to Firebug regardless of size.

thanks in advance

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