Hello, I have nginx as reverse proxy to server with IIS. The server have files .cvs. When trying to download any file the server asks for my username / password but if you put the correct data always reapplies the user and password and can not download the file. Their configuration is very basic i have hope to improve it little by little.

any suggestions to solve the problem?
Thanks.


the sites-enabled/default file is:

server {
listen 80;
server_name www.xxxxxxxx.com;

error_page 500 502 503 504 /50x.html;
location = /50x.html {
root /var/www/nginx-default;
}

location / {
proxy_pass http://Dir.to.IIS.server;
include /etc/nginx/conf.d/proxy.conf;
index index.html index.htm;
}

}


The proxy.conf:


proxy_redirect off;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
client_max_body_size 10m;
client_body_buffer_size 128k;
proxy_connect_timeout 90;
proxy_send_timeout 90;
proxy_read_timeout 90;
proxy_buffer_size 16k;
proxy_buffers 32 16k;
proxy_busy_buffers_size 64k;

the nginx.conf file:

user www-data;
worker_processes 1;

error_log /var/log/nginx/error.log;
pid /var/run/nginx.pid;

events {
worker_connections 1024;
}

http {
include /etc/nginx/mime.types;
default_type application/octet-stream;

access_log /var/log/nginx/access.log;

sendfile on;

keepalive_timeout 65;
tcp_nodelay on;

gzip on;

include /etc/nginx/conf.d/*.conf;
include /etc/nginx/sites-enabled/*;
}