# Cis Ubuntu1604 V200 2 1 6

> Ensure LDAP server is not installed

- Skill: `cyberstrikeus/cis-ubuntu1604-v200-2-1-6` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add cyberstrikeus/cis-ubuntu1604-v200-2-1-6`
- Raw SKILL.md: https://api.skillmd.com/api/skills/cyberstrikeus/cis-ubuntu1604-v200-2-1-6/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-v200-2-1-6

---


# 2.1.6 Ensure LDAP server is not installed (Automated)

## Description

The Lightweight Directory Access Protocol (LDAP) was introduced as a replacement for NIS/YP. It is a service that provides a method for looking up information from a central database.

## Rationale

If the system will not need to act as an LDAP server, it is recommended that the software be removed to reduce the potential attack surface.

## Audit Procedure

### Command Line

Run the following command to verify slapd is not installed:

```bash
dpkg -s slapd | grep -E '(Status:|not installed)'
```

## Expected Result

```
dpkg-query: package 'slapd' is not installed and no information is available
```

## Remediation

### Command Line

Run one of the following commands to remove slapd:

```bash
apt purge slapd
```

## Default Value

slapd is not installed on minimal server installations.

## References

1. For more detailed documentation on OpenLDAP, go to the project homepage at http://www.openldap.org.
2. CIS Controls v7 - 9.2 Ensure Only Approved Ports, Protocols and Services Are Running

## Profile

- Level 1 - Server
- Level 1 - Workstation