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Guide to the Secure Configuration of Red Hat Enterprise Linux 10

Rules, Groups, and Values defined within the XCCDF Benchmark

  • Ensure System is Not Acting as a Network Sniffer

    The system should not be acting as a network sniffer, which can capture all traffic on the network to which it is connected. Run the following to d...
    Rule Medium Severity
  • firewalld

    The dynamic firewall daemon <code>firewalld</code> provides a dynamically managed firewall with support for network “zones” to assign a level of tr...
    Group
  • Inspect and Activate Default firewalld Rules

    Firewalls can be used to separate networks into different zones based on the level of trust the user has decided to place on the devices and traffi...
    Group
  • Install firewalld Package

    The firewalld package can be installed with the following command:
    $ sudo dnf install firewalld
    Rule Medium Severity
  • Verify firewalld Enabled

    The firewalld service can be enabled with the following command:
    $ sudo systemctl enable firewalld.service
    Rule Medium Severity
  • Strengthen the Default Ruleset

    The default rules can be strengthened. The system scripts that activate the firewall rules expect them to be defined in configuration files under t...
    Group
  • Configure the Firewalld Ports

    Configure the <code>firewalld</code> ports to allow approved services to have access to the system. To configure <code>firewalld</code> to open por...
    Rule Medium Severity
  • Firewalld Must Employ a Deny-all, Allow-by-exception Policy for Allowing Connections to Other Systems

    Red Hat Enterprise Linux 10 incorporates the "firewalld" daemon, which allows for many different configurations. One of these configurations is zon...
    Rule Medium Severity
  • Configure Firewalld to Restrict Loopback Traffic

    Configure <code>firewalld</code> to restrict loopback traffic to the <code>lo</code> interface. The loopback traffic must be trusted by assigning ...
    Rule Medium Severity
  • Configure Firewalld to Trust Loopback Traffic

    Assign loopback interface to the <code>firewalld</code> <code>trusted</code> zone in order to explicitly allow the loopback traff...
    Rule Medium Severity
  • Set Default firewalld Zone for Incoming Packets

    To set the default zone to <code>drop</code> for the built-in default zone which processes incoming IPv4 and IPv6 packets, modify the following lin...
    Rule Medium Severity
  • IPSec Support

    Support for Internet Protocol Security (IPsec) is provided with Libreswan.
    Group
  • Install libreswan Package

    The libreswan package provides an implementation of IPsec and IKE, which permits the creation of secure tunnels over untrusted networks. The <code>...
    Rule Medium Severity
  • Verify Group Who Owns /etc/ipsec.d Directory

    To properly set the group owner of /etc/ipsec.d, run the command:
    $ sudo chgrp root /etc/ipsec.d
    Rule Medium Severity
  • Verify User Who Owns /etc/ipsec.d Directory

    To properly set the owner of /etc/ipsec.d, run the command:
    $ sudo chown root /etc/ipsec.d 
    Rule Medium Severity
  • Verify Permissions On /etc/ipsec.d Directory

    To properly set the permissions of /etc/ipsec.d, run the command:
    $ sudo chmod 0700 /etc/ipsec.d
    Rule Medium Severity
  • Verify Group Who Owns /etc/ipsec.conf File

    To properly set the group owner of /etc/ipsec.conf, run the command:
    $ sudo chgrp root /etc/ipsec.conf
    Rule Medium Severity
  • Verify Group Who Owns /etc/ipsec.secrets File

    To properly set the group owner of /etc/ipsec.secrets, run the command:
    $ sudo chgrp root /etc/ipsec.secrets
    Rule Medium Severity
  • Verify User Who Owns /etc/ipsec.conf File

    To properly set the owner of /etc/ipsec.conf, run the command:
    $ sudo chown root /etc/ipsec.conf 
    Rule Medium Severity
  • Verify User Who Owns /etc/ipsec.secrets File

    To properly set the owner of /etc/ipsec.secrets, run the command:
    $ sudo chown root /etc/ipsec.secrets 
    Rule Medium Severity

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