# CIS Ubuntu 14.04 LTS - 3.4.1 Ensure TCP Wrappers is installed

> Verify that TCP Wrappers is installed for host-based access control

- Skill: `cyberstrikeus/cis-ubuntu-14-04-lts-3-4-1-ensure-tcp-wrappers-is-installed` (Agent Skill)
- Install (CLI): `npx skillmds@latest add cyberstrikeus/cis-ubuntu-14-04-lts-3-4-1-ensure-tcp-wrappers-is-installed`
- Raw SKILL.md: https://api.skillmd.com/api/skills/cyberstrikeus/cis-ubuntu-14-04-lts-3-4-1-ensure-tcp-wrappers-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-3-4-1-ensure-tcp-wrappers-is-installed

---


# 3.4.1 Ensure TCP Wrappers is installed (Scored)

## Profile Applicability

- Level 1 - Server
- Level 1 - Workstation

## Description

TCP Wrappers provides a simple access list and standardized logging method for services capable of supporting it. In the past, services that were called from `inetd` and `xinetd` supported the use of tcp wrappers. As `inetd` and `xinetd` have been falling in disuse, any service that can support tcp wrappers will have the `libwrap.so` library attached to it.

## Rationale

TCP Wrappers provide a good simple access list mechanism to services that may not have that support built in. It is recommended that all services that can support TCP Wrappers, use it.

## Audit Procedure

Run the following command and verify TCP Wrappers is installed:

```bash
dpkg -s tcpd
```

## Expected Result

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

## Remediation

Run the following command to install TCP Wrappers:

```bash
apt-get install tcpd
```

## Default Value

Not installed by default on all systems.

## References

- CIS Controls: 9.2 - Leverage Host-based Firewalls

## Profile

- Level 1 - Server
- Level 1 - Workstation