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Guide to the Secure Configuration of OpenEmbedded

Rules, Groups, and Values defined within the XCCDF Benchmark

  • Disable named Service

    The named service can be disabled with the following command: 
    $ sudo systemctl mask --now named.service
    Rule Medium Severity
    Show

  • Isolate DNS from Other Services

    This section discusses mechanisms for preventing the DNS server from interfering with other services. This is done both to protect the remainder of...
    Group
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  • Run DNS Software in a chroot Jail

    Install the <code>bind-chroot</code> package: <pre>$ sudo yum install bind-chroot</pre> Place a valid named.conf file inside the chroot jail: <pre>...
    Group
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  • Run DNS Software on Dedicated Servers

    Since DNS is a high-risk service which must frequently be made available to the entire Internet, it is strongly recommended that no other services ...
    Group
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  • Configure Firewalls to Protect the FTP Server

    By default, <code>iptables</code> blocks access to the ports used by the web server. To configure <code>iptables</code> to allow port 21 traffic,...
    Rule Unknown Severity
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  • Restrict the Set of Users Allowed to Access FTP

    This section describes how to disable non-anonymous (password-based) FTP logins, or, if it is not possible to do this entirely due to legacy applic...
    Group
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  • Limit Users Allowed FTP Access if Necessary

    If there is a mission-critical reason for users to access their accounts via the insecure FTP protocol, limit the set of users who are allowed this...
    Rule Unknown Severity
    Show

  • Use vsftpd to Provide FTP Service if Necessary

    If your use-case requires FTP service, install and set-up vsftpd to provide it.
    Group
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  • Web Server

    The web server is responsible for providing access to content via the HTTP protocol. Web servers represent a significant security risk because: <br...
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  • Disable Apache if Possible

    If Apache was installed and activated, but the system does not need to act as a web server, then it should be disabled and removed from the system.
    Group
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  • Disable httpd Service

    The httpd service can be disabled with the following command: 
    $ sudo systemctl mask --now httpd.service
    Rule Unknown Severity
    Show

  • Disable NGINX if Possible

    If NGINX was installed and activated, but the system does not need to act as a web server, then it should be removed from the system.
    Group
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  • Install Apache if Necessary

    If <code>httpd</code> was not installed and activated, but the system needs to act as a web server, then it should be installed on the system. Foll...
    Group
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  • Confirm Minimal Built-in Modules Installed

    The default <code>httpd</code> installation minimizes the number of modules that are compiled directly into the binary (<code>core prefork http_cor...
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  • Secure Apache Configuration

    The <code>httpd</code> configuration file is <code>/etc/httpd/conf/httpd.conf</code>. Apply the recommendations in the remainder of this section to...
    Group
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  • HTTPD Log Level

    The setting for LogLevel in /etc/httpd/conf/httpd.conf
    Value
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  • Maximum KeepAlive Requests for HTTPD

    The setting for MaxKeepAliveRequests in httpd.conf
    Value
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  • Run httpd in a chroot Jail if Practical

    Running <code>httpd</code> inside a <code>chroot</code> jail is designed to isolate the web server process to a small section of the filesystem, li...
    Group
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  • Restrict File and Directory Access

    Minimize access to critical httpd files and directories.
    Group
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  • Configure PERL Securely

    PERL (Practical Extraction and Report Language) is an interpreted language optimized for scanning arbitrary text files, extracting information from...
    Group
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