# CIS Ubuntu 14.04 LTS - 3.6.1 Ensure iptables is installed

> Verify that iptables is installed for firewall management and configuration

- Skill: `cyberstrikeus/cis-ubuntu-14-04-lts-3-6-1-ensure-iptables-is-installed` (Agent Skill)
- Install (CLI): `npx skillmds@latest add cyberstrikeus/cis-ubuntu-14-04-lts-3-6-1-ensure-iptables-is-installed`
- Raw SKILL.md: https://api.skillmd.com/api/skills/cyberstrikeus/cis-ubuntu-14-04-lts-3-6-1-ensure-iptables-is-installed/raw
- Safety review: PASS (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: cyberstrikeus (https://skillmd.com/u/cyberstrikeus)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/cyberstrikeus/cis-ubuntu-14-04-lts-3-6-1-ensure-iptables-is-installed

---


# 3.6.1 Ensure iptables is installed (Scored)

## Profile Applicability

- Level 1 - Server
- Level 1 - Workstation

## Description

`iptables` allows configuration of the IPv4 tables in the linux kernel and the rules stored within them. Most firewall configuration utilities operate as a front end to `iptables`.

## Rationale

iptables is required for firewall management and configuration.

## Audit Procedure

Run the following command and verify iptables is installed:

```bash
dpkg -s iptables
```

## Expected Result

The package `iptables` should be installed (status: install ok installed).

## Remediation

Run the following command to install `iptables`:

```bash
apt-get install iptables
```

## Default Value

Installed by default on Ubuntu.

## References

- CIS Controls: 9.2 - Leverage Host-based Firewalls

## Profile

- Level 1 - Server
- Level 1 - Workstation