| name | cis-ubuntu1804-v220-3-4-1-1 |
| description | Ensure ufw is installed |
| category | cis-networking |
| version | 2.2.0 |
| author | cyberstrike-official |
| tags | ["cis","ubuntu","linux","ubuntu-18.04","networking","firewall","ufw"] |
| cis_id | 3.4.1.1 |
| cis_benchmark | CIS Ubuntu Linux 18.04 LTS Benchmark v2.2.0 |
| tech_stack | ["ubuntu","linux"] |
| cwe_ids | [] |
| chains_with | [] |
| prerequisites | [] |
| severity_boost | {} |
CIS Ubuntu Linux 18.04 LTS Benchmark v2.2.0 - Control 3.4.1.1
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 built in netfilter framework and provide protection against unwanted network traffic.
Impact
None.
Audit Procedure
Command Line
Run the following command to verify that Uncomplicated Firewall (UFW) is installed:
dpkg-query -s ufw | grep 'Status: install ok installed'
Expected Result
Status: install ok installed
Remediation
Command Line
Run the following command to install Uncomplicated Firewall (UFW):
apt install ufw
Default Value
ufw is installed by default on Ubuntu.
References
- NIST SP 800-53 Rev. 5: CA-9, SC-7
- CIS Ubuntu Linux 18.04 LTS Benchmark v2.2.0
CIS Controls
Version 8
4.4 Implement and Manage a Firewall on Servers - Implement and manage a firewall on servers, where supported.
4.5 Implement and Manage a Firewall on End-User Devices - Implement and manage a host-based firewall or port-filtering tool on end-user devices.
Version 7
9.4 Apply Host-based Firewalls or Port Filtering - Apply host-based firewalls or port filtering tools on end systems, with a default-deny rule that drops all traffic except those services and ports that are explicitly allowed.
Profile Applicability
- Level 1 - Server
- Level 1 - Workstation
Assessment Status
Automated