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Guide to the Secure Configuration of Ubuntu 18.04

Rules, Groups, and Values defined within the XCCDF Benchmark

  • Application Whitelisting Daemon

    Fapolicyd (File Access Policy Daemon) implements application whitelisting to decide file access rights. Applications that are known via a reputatio...
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  • fapolicyd Must be Configured to Limit Access to Users Home Folders

    fapolicyd needs be configured so that users cannot give access to their home folders to other users.
    Rule Medium Severity
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  • 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...
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  • Disable vsftpd if Possible

    To minimize attack surface, disable vsftpd if at all possible.
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  • 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
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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...
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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
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  • 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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  • 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...
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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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  • Configure Operating System to Protect Web Server

    The following configuration steps should be taken on the system which hosts the web server, in order to provide as safe an environment as possible ...
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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...
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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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  • Configure PHP Securely

    PHP is a widely-used and often misconfigured server-side scripting language. It should be used with caution, but configured appropriately when need...
    Group
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