为什么 www.example.com 与 example.com 不同？

Question

我的网站可以通过 www.fonix-energia.hu 和 fonix-energia.hu 访问。在第一种情况下，网站似乎分崩离析，而没有www它则可以完美运行。/var/www/fonix文件夹中只有一个站点副本。服务器上根本不应该有替代版本。

这是我的 DNS 配置：这两个地址应该指向同一个地方：

 Name                           TTL Class   Type    Record  
 fonix-energia.hu.              14400   IN  A     95.85.47.115  
 localhost.fonix-energia.hu.    14400   IN  A     127.0.0.1 
 mail.fonix-energia.hu.      14400  IN  CNAME ghs.googlehosted.com  
 ftp.fonix-energia.hu.          14400   IN  A     195.56.100.77 
 cpanel.fonix-energia.hu.       14400   IN  A     195.56.100.77 
 webdisk.fonix-energia.hu.       14400  IN  A     195.56.100.77 
 whm.fonix-energia.hu.          14400   IN  A     195.56.100.77 
 webmail.fonix-energia.hu.       14400  IN  A     195.56.100.77 
 autoconfig.fonix-energia.hu.   14400   IN  A     195.56.100.77 
 autodiscover.fonix-energia.hu. 14400   IN  A     195.56.100.77 
 fonix-energia.hu.              14400   IN  TXT   google-ite-verification=[CENSORED]

 www.fonix-energia.hu.          14400   IN  CNAME fonix-energia.hu

这是apache2的配置。这里我也认为虚拟主机配置指向相同的位置：

<VirtualHost *:80>
    # The ServerName directive sets the request scheme, hostname and port that
    # the server uses to identify itself. This is used when creating
    # redirection URLs. In the context of virtual hosts, the ServerName
    # specifies what hostname must appear in the request's Host: header to
    # match this virtual host. For the default virtual host (this file) this
    # value is not decisive as it is used as a last resort host regardless.
    # However, you must set it for any further virtual host explicitly.
    #ServerName www.example.com

    ServerAdmin info@fonix-energia.hu
    DocumentRoot /var/www



    # Available loglevels: trace8, ..., trace1, debug, info, notice, warn,
    # error, crit, alert, emerg.
    # It is also possible to configure the loglevel for particular
    # modules, e.g.
    #LogLevel info ssl:warn

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

    # For most configuration files from conf-available/, which are
    # enabled or disabled at a global level, it is possible to
    # include a line for only one particular virtual host. For example the
    # following line enables the CGI configuration for this host only
    # after it has been globally disabled with "a2disconf".
    #Include conf-available/serve-cgi-bin.conf
</VirtualHost>

<VirtualHost *:80>
    DocumentRoot /var/www/fonix
    ServerName fonix-energia.hu
    # Other directives here
</VirtualHost>

<VirtualHost *:80>
    DocumentRoot /var/www/fonix
    ServerName www.fonix-energia.hu
    # Other directives here
</VirtualHost>

Answer 1

取出第二个 VirtualHost，它应该只是一个带 www 的。作为别名：

<VirtualHost *:80>
    DocumentRoot /var/www/fonix
    ServerName fonix-energia.hu
    ServerAlias www.fonix-energia.hu
    # Other directives here
</VirtualHost>