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Guide to the Secure Configuration of Ubuntu 22.04

Rules, Groups, and Values defined within the XCCDF Benchmark

  • Install ufw Package

    The ufw package can be installed with the following command: 
    $ apt-get install ufw
    Rule Medium Severity
    Show

  • Remove ufw Package

    The ufw package can be removed with the following command: 
    $ apt-get remove ufw
    Rule Medium Severity
    Show

  • Verify ufw Enabled

    The ufw service can be enabled with the following command: 
    $ sudo systemctl enable ufw.service
    Rule Medium Severity
    Show

  • Ensure ufw Default Deny Firewall Policy

    A default deny policy on connections ensures that any unconfigured network usage will be rejected. Note: Any port or protocol without a explicit a...
    Rule Medium Severity
    Show

  • Set UFW Loopback Traffic

    Configure the loopback interface to accept traffic. Configure all other interfaces to deny traffic to the loopback network.
    Rule Medium Severity
    Show

  • Ensure ufw Firewall Rules Exist for All Open Ports

    Any ports that have been opened on non-loopback addresses need firewall rules to govern traffic.
    Rule Medium Severity
    Show

  • Uncommon Network Protocols

    The system includes support for several network protocols which are not commonly used. Although security vulnerabilities in kernel networking code ...
    Group
    Show

  • authlogin_nsswitch_use_ldap SELinux Boolean

    default - Default SELinux boolean setting.
    on - SELinux boolean is enabled.
    off - SELinux boolean is disabled.
    Value
    Show

  • Disable DCCP Support

    The Datagram Congestion Control Protocol (DCCP) is a relatively new transport layer protocol, designed to support streaming media and telephony. T...
    Rule Medium Severity
    Show

  • Disable RDS Support

    The Reliable Datagram Sockets (RDS) protocol is a transport layer protocol designed to provide reliable high-bandwidth, low-latency communications ...
    Rule Low Severity
    Show

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