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''mod_ssl''模块为Apache2服务器添加了一个重要的功能 - 加密通信的能力。由此，当你的浏览器通信使用SSL时，https://前缀被使用于统一资源定位符（URL）前。

''mod_ssl''模块存放于''apache2-common''包中。在终端提示符下执行以下命令以允许''mod_ssl''模块：<br/><code style="background-color:lightgray">sudo a2enmod ssl</code>

There is a default HTTPS configuration file in /etc/apache2/sites-available/default-ssl. In order for Apache2 to provide HTTPS, a certificate and key file are also needed. The default HTTPS configuration will use a certificate and key generated by the ssl-cert package. They are good for testing, but the auto-generated certificate and key should be replaced by a certificate specific to the site or server. For information on generating a key and obtaining a certificate see [https://help.ubuntu.com/12.04/serverguide/certificates-and-security.html Certificates]

To configure Apache2 for HTTPS, enter the following:<br/><code style="background-color:lightgray">sudo a2ensite default-ssl</code>

: <span style="background-color:lightgray">The directories /etc/ssl/certs and /etc/ssl/private are the default locations. If you install the certificate and key in another directory make sure to change SSLCertificateFile and SSLCertificateKeyFile appropriately. </span>

With Apache2 now configured for HTTPS, restart the service to enable the new settings: <br/><code style="background-color:lightgray">sudo service apache2 restart</code>

: <span style="background-color:lightgray">Depending on how you obtained your certificate you may need to enter a passphrase when Apache2 starts. </span>

You can access the secure server pages by typing https://your_hostname/url/ in your browser address bar.