Guide to the Secure Configuration of Red Hat Enterprise Linux 8
Rules, Groups, and Values defined within the XCCDF Benchmark
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Disable Zeroconf Networking
Zeroconf networking allows the system to assign itself an IP address and engage in IP communication without a statically-assigned address or even a...Rule Unknown Severity -
Prevent non-Privileged Users from Modifying Network Interfaces using nmcli
By default, non-privileged users are given permissions to modify networking interfaces and configurations using the <code>nmcli</code> command. Non...Rule Medium Severity -
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 -
Configure Firewalld to Use the Nftables Backend
Firewalld can be configured with many backends, such as nftables.Rule Medium Severity -
Ensure network interfaces are assigned to appropriate zone
Firewall zones define the trust level of network connections or interfaces. Note: Changing firewall settings while connected over network can resul...Rule Medium Severity -
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
Thefirewalld
package can be installed with the following command:$ sudo yum install firewalld
Rule Medium Severity -
net.ipv6.conf.default.router_solicitations
Accept all router solicitations by default?Value -
daemons_use_tcp_wrapper SELinux Boolean
default - Default SELinux boolean setting.
on - SELinux boolean is enabled.
off - SELinux boolean is disabled.Value
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