nginx反向代理丢失端口怎么解决 - nginx报错

具体配置如下，访问的时候是8084端口，只要项目里面有重定向，就会变成8081 端口，请问这个配置哪里出问题了呢

upstream lotus_web_test {
		server 60.205.184.143:8081;
    }

    server {
        listen       8084;
        server_name  localhost;

        location / {
        	proxy_set_header X-Forwarded-Host $host;
        	proxy_set_header X-Forwarded-Server $host;
            proxy_set_header Host $host:8084;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_buffering off;
            proxy_pass http://lotus_web_test;
        }

        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }
    }