Oauth server application behind the niginx reverse proxy - asp.net-mvc

Question

I have used OAuth authentication in my server.I'm trying a server configuration using an nginx reverse proxy and ssl.
I have redirected the https request to http using niginx reverse proxy configuration.
My Nginx server blocks look like:
server {
listen 193.169.200.88:8084;
server_name test2.test.com;
#charset koi8-r;
#access_log logs/host.access.log main;
location / {
proxy_pass http://localhost:50489/;
proxy_redirect off;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_max_temp_file_size 0;
client_max_body_size 10m;
client_body_buffer_size 128k;
proxy_connect_timeout 90;
proxy_send_timeout 90;
proxy_read_timeout 90;
proxy_buffer_size 4k;
proxy_buffers 4 32k;
proxy_busy_buffers_size 64k;
proxy_temp_file_write_size 64k;
}
#error_page 404 /404.html;
# redirect server error pages to the static page /50x.html
#
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root html;
}
# proxy the PHP scripts to Apache listening on 127.0.0.1:82
#
#location ~ \.php$ {
# proxy_pass http://127.0.0.1;
#}
# pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
#
#location ~ \.php$ {
# root html;
# fastcgi_pass 127.0.0.1:9000;
# fastcgi_index index.php;
# fastcgi_param SCRIPT_FILENAME /scripts$fastcgi_script_name;
# include fastcgi_params;
#}
# deny access to .htaccess files, if Apache's document root
# concurs with nginx's one
#
#location ~ /\.ht {
# deny all;
#}
}
and
server {
listen 171.16.202.219:443 ssl;
server_name test2.test.com;
ssl_certificate /nginx/conf/nginxnew.crt;
ssl_certificate_key /nginx/conf/nginxnew.key;
ssl_session_timeout 5m;
ssl_protocols SSLv2 SSLv3 TLSv1;
ssl_ciphers ALL:!ADH:!EXPORT56:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP;
ssl_prefer_server_ciphers on;
location / {
proxy_pass http://193.169.200.88:8084;
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;
proxy_max_temp_file_size 0;
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 4k;
proxy_buffers 4 32k;
proxy_busy_buffers_size 64k;
proxy_temp_file_write_size 64k;
}
}
If i run the server in my local machine i can easily login. But if I run the same code behind the reverse proxy the oauth request not working properly.
The oauth request going like http://test2.test.com:50489/oauth/v1/authorize?client_id=f7d1705a-b3fb-45b8-84ee-0afa4179f964&redirect_uri=https:%2F%2Ftest1.test.com%2Flogin&state=LPHxiHo_AmnfB1hqPjSNVQ&scope=Profile&response_type=code.
I want this oauth url like below,
https://test2.test.com/oauth/v1/authorize?client_id=f7d1705a-b3fb-45b8-84ee-0afa4179f964&redirect_uri=https:%2F%2Ftest1.test.com%2Flogin&state=LPHxiHo_AmnfB1hqPjSNVQ&scope=Profile&response_type=code
Any ideas for this?