LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" combined
LogFormat "%{X-Forwarded-For}i %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" proxy
SetEnvIf X-Forwarded-For "^.*\..*\..*\..*" forwarded
CustomLog "/var/log/apache2/nc-access.log" combined env=!forwarded
CustomLog "/var/log/apache2/nc-access.log" proxy env=forwarded

proxy_params

proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;

proxy_pass_header  Set-Cookie;

proxy_redirect off;
proxy_buffering off;
proxy_request_buffering off;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
proxy_headers_hash_max_size 512;
proxy_headers_hash_bucket_size 64;