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Guide to the Secure Configuration of Red Hat Enterprise Linux 9

Rules, Groups, and Values defined within the XCCDF Benchmark

  • FTP Server

    FTP is a common method for allowing remote access to files. Like telnet, the FTP protocol is unencrypted, which means that passwords and other data...
    Group
    Show

  • Remove ftp Package

    FTP (File Transfer Protocol) is a traditional and widely used standard tool for transferring files between a server and clients over a network, esp...
    Rule Low Severity
    Show

  • Disable vsftpd if Possible

    To minimize attack surface, disable vsftpd if at all possible.
    Group
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  • Uninstall vsftpd Package

    The vsftpd package can be removed with the following command: 
     $ sudo dnf erase vsftpd
    Rule High Severity
    Show

  • Disable vsftpd Service

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

  • Configure vsftpd to Provide FTP Service if Necessary

    The primary vsftpd configuration file is /etc/vsftpd.conf, if that file exists, or /etc/vsftpd/vsftpd.conf if it does not.
    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
    Show

  • 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
    Show

  • 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
    Show

  • Uninstall httpd Package

    The httpd package can be removed with the following command: 
    $ sudo dnf erase httpd
    Rule Unknown Severity
    Show

  • 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...
    Group
    Show

  • 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
    Show

  • Uninstall nginx Package

    The nginx package can be removed with the following command: 
    $ sudo dnf erase nginx
    Rule Unknown Severity
    Show

  • 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
    Show

  • 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...
    Group
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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
    Show

  • HTTPD Log Level

    The setting for LogLevel in /etc/httpd/conf/httpd.conf
    Value
    Show

  • Maximum KeepAlive Requests for HTTPD

    The setting for MaxKeepAliveRequests in httpd.conf
    Value
    Show

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