# Cis Ubuntu1604 V200 2 1 5

> Ensure DHCP Server is not installed

- Skill: `cyberstrikeus/cis-ubuntu1604-v200-2-1-5` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add cyberstrikeus/cis-ubuntu1604-v200-2-1-5`
- Raw SKILL.md: https://api.skillmd.com/api/skills/cyberstrikeus/cis-ubuntu1604-v200-2-1-5/raw
- Safety review: pending (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-ubuntu1604-v200-2-1-5

---


# 2.1.5 Ensure DHCP Server is not installed (Automated)

## Description

The Dynamic Host Configuration Protocol (DHCP) is a service that allows machines to be dynamically assigned IP addresses.

## Rationale

Unless a system is specifically set up to act as a DHCP server, it is recommended that this package be removed to reduce the potential attack surface.

## Audit Procedure

### Command Line

Run the following commands to verify isc-dhcp-server is not installed:

```bash
dpkg -s isc-dhcp-server | grep -E '(Status:|not installed)'
```

## Expected Result

```
dpkg-query: package 'isc-dhcp-server' is not installed and no information is available
```

## Remediation

### Command Line

Run the following command to remove isc-dhcp-server:

```bash
apt purge isc-dhcp-server
```

## Default Value

isc-dhcp-server is not installed on minimal server installations.

## References

1. More detailed documentation on DHCP is available at http://www.isc.org/software/dhcp.
2. CIS Controls v7 - 9.2 Ensure Only Approved Ports, Protocols and Services Are Running

## Profile

- Level 1 - Server
- Level 1 - Workstation