cyberstrikeus CIS Ubuntu Linux 20.04 LTS Benchmark v3.0.0 - Control 4.2.1
Profile
- Level: Level 1 - Server, Level 1 - Workstation
- Assessment Status: Automated
Description
The Uncomplicated Firewall (ufw) is a frontend for iptables and is particularly well-suited for host-based firewalls. ufw provides a framework for managing netfilter, as well as a command-line interface for manipulating the firewall
Rationale
A firewall utility is required to configure the Linux kernel's netfilter framework via the iptables or nftables back-end.
The Linux kernel's netfilter framework host-based firewall can protect against threats originating from within a corporate network to include malicious mobile code and poorly configured software on a host.
Note: Only one firewall utility should be installed and configured. UFW is dependent on the iptables package
Audit Procedure
Command Line
Run the following command to verify that Uncomplicated Firewall (UFW) is installed:
dpkg-query -s ufw &>/dev/null && echo "ufw is installed"
Expected Result
ufw is installed
Remediation
Command Line
Run the following command to install Uncomplicated Firewall (UFW):
apt install ufw
Default Value
Not applicable.
References
- NIST SP 800-53 Rev. 5: SC-7
CIS Controls
v8 - 4.4 Implement and Manage a Firewall on Servers v8 - 4.5 Implement and Manage a Firewall on End-User Devices v7 - 9.4 Apply Host-based Firewalls or Port Filtering
MITRE ATT&CK Mappings: T1562, T1562.004 | TA0011 | M1031, M1037