Apache-Ubuntu：无法使用 IP 地址访问我的网站

Question

我有一个网站正在运行Ubuntu 16.04vps 与 Apache。最近我无法使用其 IP 地址访问主网页。请帮我调试我的服务器配置。

主站点.conf：

<VirtualHost *:80>
    ServerAdmin [email protected]
    ServerName X.X.X.X
    DocumentRoot /var/www/html

        <Directory />
                Options FollowSymLinks
                AllowOverride None
        </Directory>
        <Directory /var/www/html/>
                Options Indexes FollowSymLinks MultiViews
                AllowOverride None
                Order allow,deny
                allow from all
        </Directory>

    ErrorLog ${APACHE_LOG_DIR}/error.log
    CustomLog ${APACHE_LOG_DIR}/access.log combined
</VirtualHost>

apache2.conf包含：

...

<Directory />
        Options FollowSymLinks
        AllowOverride all

</Directory>

<Directory /usr/share>
        AllowOverride all
</Directory>

<Directory /var/www/>
        Options Indexes FollowSymLinks
        AllowOverride all
</Directory>

 <Directory /var/www/html/>
        Options Indexes FollowSymLinks MultiViews
        AllowOverride All
        Order allow,deny
        allow from all
    </Directory>
...

和/etc/hosts：

127.0.0.1   localhost
127.0.1.1   guest-desktop
185.211.88.62   student.aut.ac.ir       student



# The following lines are desirable for IPv6 capable hosts
::1     localhost ip6-localhost ip6-loopback
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters