Guide to the Secure Configuration of Red Hat Enterprise Linux 7
Rules, Groups, and Values defined within the XCCDF Benchmark
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Disable HTTP mod_rewrite
The <code>mod_rewrite</code> module is very powerful and can protect against certain classes of web attacks. However, it is also very complex and h...Rule Unknown Severity -
Set httpd ServerSignature Directive to Off
<code>ServerSignature Off</code> restricts <code>httpd</code> from displaying server version number on error pages. <br><br> Add or correct the fol...Rule Unknown Severity -
Disable Server Activity Status
The <code>status</code> module provides real-time access to statistics on the internal operation of the web server. This may constitute an unnecess...Rule Unknown Severity -
Disable Web Server Configuration Display
The <code>info</code> module creates a web page illustrating the configuration of the web server. This can create an unnecessary security leak and ...Rule Unknown Severity -
Disable Server Side Includes
Server Side Includes provide a method of dynamically generating web pages through the insertion of server-side code. However, the technology is als...Rule Unknown Severity -
Disable URL Correction on Misspelled Entries
The <code>speling</code> module attempts to find a document match by allowing one misspelling in an otherwise failed request. If this functionality...Rule Unknown Severity -
Disable WebDAV (Distributed Authoring and Versioning)
WebDAV is an extension of the HTTP protocol that provides distributed and collaborative access to web content. If its functionality is unnecessary,...Rule Unknown Severity -
Minimize Modules for HTTP Basic Authentication
The following modules are necessary if this web server will provide content that will be restricted by a password. <br><br> Authentication can be p...Group -
Minimize Configuration Files Included
The <code>Include</code> directive directs <code>httpd</code> to load supplementary configuration files from a provided path. The default configura...Group -
Set httpd ServerTokens Directive to Prod
<code>ServerTokens Prod</code> restricts information in page headers, returning only the word "Apache." <br><br> Add or correct the following direc...Rule Unknown Severity -
Minimize Various Optional Components
The following modules perform very specific tasks, sometimes providing access to just a few additional directives. If such functionality is not req...Group -
Use Appropriate Modules to Improve httpd's Security
Among the modules available for <code>httpd</code> are several whose use may improve the security of the web server installation. This section reco...Group -
Deploy mod_security
The <code>security</code> module provides an application level firewall for <code>httpd</code>. Following its installation with the base ruleset, s...Group -
Install mod_security
Install the <code>security</code> module: The <code>mod_security</code> package can be installed with the following command: <pre> $ sudo yum insta...Rule Unknown Severity -
Deploy mod_ssl
Because HTTP is a plain text protocol, all traffic is susceptible to passive monitoring. If there is a need for confidentiality, SSL should be conf...Group -
Enable Transport Layer Security (TLS) Encryption
Disable old SSL and TLS version and enable the latest TLS encryption by setting the following in <code>/etc/httpd/conf.modules.d/ssl.conf</code>: <...Rule Medium Severity -
Configure A Valid Server Certificate
Configure the web site to use a valid organizationally defined certificate. For DoD, this is a DoD server certificate issued by the DoD CA.Rule Medium Severity -
Install mod_ssl
Install the <code>mod_ssl</code> module: The <code>mod_ssl</code> package can be installed with the following command: <pre> $ sudo yum install mod...Rule Unknown Severity -
Require Client Certificates
<code>SSLVerifyClient</code> should be set and configured to <code>require</code> by setting the following in <code>/etc/httpd/conf/httpd.conf</cod...Rule Medium Severity -
Restrict Web Server Information Leakage
The <code>ServerTokens</code> and <code>ServerSignature</code> directives determine how much information the web server discloses about the configu...Group
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