proxy_http_version 1.1;
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_set_header X-Forwarded-Proto $scheme;
proxy_set_header X-Request-ID $request_id;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection $lisglosips_connection_upgrade;
proxy_connect_timeout 3s;
proxy_send_timeout 30s;
proxy_read_timeout 30s;
proxy_buffering on;
proxy_buffer_size 8k;
proxy_buffers 8 16k;