I config a reverse proxy to Windows IIS 6.0 (windows auth), visit windows server url is ok.

Visit nginx proxy to this site tips my input pwd & username, repeat this tips input over, repeat, repeat, repeat, repeat.

this is my nginx config

server {
listen 80;
server_name xxx.com;

location / {
proxy_pass http://xxx.com;
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_max_temp_file_size 0;
proxy_connect_timeout 30;
proxy_read_timeout 120;
}
}