How to force nginx not to remove Accept-Encoding: gzip?

Question

Nginx

There is a simple scheme
client (Accept-Encoding: gzip) <-> nginx <-> iis
In the place highlighted in bold, for some reason, uncompressed traffic arrives from IIS. And if you make a request directly to IIS, then the IIS response is too tight. In nginx config:

gzip on;
gzip_proxied any;
gzip_types text/plain text/xml text/css application/x-javascript application/json text/javascript application/xml;
gzip_variable on;
gzip_disable "msie6";
gzip_http_version 1.1;

It seems that when gzip is enabled on the Nginx side, the accept-encoding: gzip header is cut out in a request that goes to iis. How to make sure that the response is pressed on the iis side?

Answer 1

Understood. nginx was hammering on http1.0. iis is not able to reap on such version. Registered proxy_http_version 1.1 - it all worked