resource: net::ERR_CONNECTION_TIMED_OUT

Hi all ;). Hope everyone is good. Taking the Chance using the Community for helpfully Info ;).

i'am little bit desperated, as not sure where the Issue is.

i'am using VMware vSphere6 and installed on Centos6 the nginx-1.10.1.

i'am configured the Proxy to listen onto 443 and to pass it to the Webclient ip.

So far so good. First Site working. 2nd gives me the Credential Screen. it's also working. once giving wrong Pass > it's giving me an Authentication Error > so means for me Communiction is working. but once i try to Login with correct pass the Browser is getting the Timed_Out error after about 20Secs. i checked logs. not seeing some Errors. all with Http Status 200. Just seeing strange DYNAMIC Entry next to the /vsphere-client/UI.swf.

i use following Code:

server {
listen 443;
ssl on;
ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
ssl_session_timeout 10m;
ssl_certificate /etc/nginx/ssl/ca.crt;
ssl_certificate_key /etc/nginx/ssl/ca.key;


location / {
proxy_ssl_certificate /etc/nginx/ssl/ca.crt;
proxy_ssl_certificate_key /etc/nginx/ssl/ca.key;
proxy_pass https://xxxx;
#proxy_read_timeout 200s;
#proxy_connect_timeout 200s;
}


}

Last Message in the Log i see:

"POST /vsphere-client/endpoints/messagebroker/amf HTTP/1.1" 200 1176 "https://xxxxx/vsphere-client/UI.swf/[[DYNAMIC]]/6" "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.103 Safari/537.36" "-"


i tried to use also with removing the hash in the timeout lines.Maybe something wrong with this Dynamic swf?

for any Help i would be very happy.

Many thx in Advance.

Best regards

Max