添加到

/etc/nginx/nginx.conf

添加内容：

stream {
    upstream ssr {
        hash $remote_addr consistent;
        server 127.0.0.1:31905 weight=5 max_fails=3 fail_timeout=30s;
    }
    server {
       listen 4008;
       proxy_connect_timeout 1s;
       proxy_timeout 3s;
       proxy_pass ssr;
    }
}

监听4008，映射到127.0.0.1:31905，名字ssr。