This is my config and
how i can keep alive request from port *:83 and port *:7082
http{
upstream download_redirect {
server 127.0.0.1:80 weight=1;
keepalive 20;
}


server {
listen 7082;
server_name localhost;

location ~ ^/x-keam/service/v0.5/videos/stream(.*)$ {
if ( $args ) {
return 307 http://111.30.211.144:8000/x-keam/service/v1.0/videos/stream$1?$args;
}
return 307 http://111.30.211.144:8000/x-keam/service/v1.0/videos/stream$1;
}
}

server {
listen 83;
server_name localhost;
location ~ ^/x-keam/service/v0.5/videos/stream(.*)$ {
proxy_pass http://download_redirect;
proxy_http_version 1.1;
proxy_set_header Connection "";
}
}