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为什么 www.example.com 与 example.com 不同？

tag-icon • tag-icon domain-name-system apache-2.4
为什么 www.example.com 与 example.com 不同？

我的网站是 www.fonix-energia.hu 和 fonix-energia.hu。在第一种情况下，网站似乎崩溃了，而没有它，www它运行正常。文件夹中只有一个网站副本/var/www/fonix。服务器上不应该有替代版本。

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 配置。在这里，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 [email protected]
    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>

答案1

取出第二个 VirtualHost，它应该只是一个以 www. 作为别名的：

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

答案2

虽然这不是导致您出现问题的原因，但仅供参考，您不需要对 www 使用 CNAME，而是使用 A 记录，就像您对 fonix-energia.hu 所做的那样。我的另一个挑剔之处是您不必在记录中使用 FQDN。

因此，不要：

fonix-energia.hu.              14400  IN  A     95.85.47.115

您可以使用：

@              14400  IN  A     95.85.47.115

而不是 CNAME：

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

您可以使用：

www              14400  IN  A     95.85.47.115

或者：

www.fonix-energia.hu.              14400  IN  A     95.85.47.115

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