初次用Tengine, 出现错误：

403 Forbidden

You don't have permission to access the URL on this server. Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!
URL: http://172.20.6.136:81/
Server: webphp2.yumwei.com
Date: 2016/01/04 21:30:48
Powered by Tengine/2.0.3

然后不停地找方案，例如把网站目录 /home/wwwroot/Comp权限设置成777，或者在nginx.conf配置文件中添加 user root ...都不管用，还请各位大神赐教