Apache Modules

<slideshow style="nobleprog" headingmark="⌘" incmark="…" scaled="true" font="Trebuchet MS" >

title

Apache Modules

author

Sam Bashton (NobleProg Ltd)

</slideshow>

Apache modules ⌘

• RHEL ships with many Apache modules included
• Almost all are enabled by default
• This increases memory consumption of each and every Apache process

mod_dav ⌘

• WebDav - extension for HTTP that allows users to edit and manage files on remote servers

Configuring webdav ⌘

```
<IfModule mod_dav.c>
   LimitXMLRequestBody 131072
   Alias /webdav "/home/httpd/webdav"
   <Directory /var/www/dav>
       Dav On
       Options +Indexes
       IndexOptions FancyIndexing
       AddDefaultCharset UTF-8
   </Directory>
</IfModule>
```

mod_php ⌘

• The main reason to run Apache
• `yum install php`

PHP Options ⌘

• Configured via `/etc/php.ini`

• `post_max_size` - maximum data size accepted by POST, 8MB by default
• `upload_max_filesize` - maximum file size that can be uploaded, 2MB by default
• `max_execution_time` - maximum time a PHP script can run
• memory_limit - maximum amount of memory a single PHP process can use

mod_security ⌘

• Tries to add extra security by blocking requests that look like attacks
• Questionable how successful it is
• Can break some applications

EPEL ⌘

• http://fedoraproject.org/wiki/EPEL
• EPEL - Extra Packages for Enterprise Linux
• Community maintained package repo for RHEL
• Includes mod_security

Installing mod_security ⌘

• Once EPEL has been enabled - `yum install mod_security`

Exercise ⌘

• Enable mod_php
• Enable mod_security