Apache server configuration overview (4)

Options FollowSymLinks
AllowOverride None
The Apache server can control document access to directories. However
In the httpd. conf file (or access. conf ).
Set the access control file in each directory.
The name is. htaccess. Although both methods can be used to control browser access, the configuration file method requires that the httpd daemon be restarted after each change, which is not flexible, therefore, it is mainly used to configure the overall security control policy of the server system and use. it is more flexible and convenient to set access control for specific directories in the htaccess file.
　
The Directory statement is used to define the access restriction of a Directory. here we can see its standard syntax, which defines the access restriction for a Directory. In the preceding example, this setting is for the root directory of the system. The FollowSymLinks option is set to allow symbolic connections, and use AllowOverride None to indicate that the access control file in this directory is not allowed to change the configuration here, which means that you do not need to view the corresponding access control file in this directory.
　
Because Apache's access control settings for a directory can be inherited by the next-level directory
The setting of the root directory affects its sub-directory. Note that due to the setting of AllowOverride None
The Apache server does not need to view the access control file under the root directory, or view the following levels
Directory until a directory is specified in httpd. conf (or access. conf ).
Allows Alloworride to view access control files. Because Apache uses the Inheritance Method for directory access control, if you can view the access control file from the root directory, Apache must view the access control file at the first level, this will affect system performance. By default, the root directory feature is disabled, which enables Apache to search down from the specific directory specified in httpd. conf, reducing the search level and increasing system performance. Therefore, setting AllowOverride None in the system root directory is not only helpful to system security, but also beneficial to system performance.
　

Options Indexes FollowSymLinks
AllowOverride None
Order allow, deny
Allow from all
Here, we define access settings for directories in the system's external release documents, and set different AllowOverride options to define the relationship between directory settings in the configuration file and security control files in the user directory, the Options option defines the features of this directory.
　
You can set access restrictions for the configuration file and the access control file in each directory.
Set by the Administrator, and the access control files under each directory are set by the owner of the directory. Therefore