# Cis Bind V100 2 3

> Lock the BIND User Account (Automated)

- Skill: `cyberstrikeus/cis-bind-v100-2-3` (Agent Skill)
- Install (CLI): `npx skillmds@latest add cyberstrikeus/cis-bind-v100-2-3`
- Raw SKILL.md: https://api.skillmd.com/api/skills/cyberstrikeus/cis-bind-v100-2-3/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-bind-v100-2-3

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# CIS 2.3 — Lock the BIND User Account

## Profile Applicability

- Authoritative Name Server Level 1
- Caching Only Name Server Level 1

## Description

The user account under which BIND runs should not have a valid password, but should be locked.

## Rationale

As a defense-in-depth measure the named user account should be locked to prevent logins, and to prevent a user from `su`'ing to `named` using a password. In general, there shouldn't be a need for anyone to have to `su` as `named`, and when there is a need, then `sudo` should be used instead, which would not require the account password.

## Impact

Not specified.

## Audit Procedure

Ensure the named account is locked using the following:

```bash
# passwd -S named
named LK 2020-02-11 -1 -1 -1 -1 (Password locked.)
```

The results must have the LK value in the second field, similar to the output shown above.

## Remediation

To remediate, lock the named account using the password command with the lock option as shown below.

```bash
# passwd -l named
Locking password for user named.
passwd: Success
```

## Default Value

Account is locked by default.

## References

None listed.

## CIS Controls

| Controls Version | Control                           | IG 1 | IG 2 | IG 3 |
| ---------------- | --------------------------------- | ---- | ---- | ---- |
| v6               | 16 Account Monitoring and Control | Y    | Y    | Y    |

## MITRE ATT&CK Mappings

| Tactic               | Technique            |
| -------------------- | -------------------- |
| Privilege Escalation | T1078 Valid Accounts |
| Credential Access    | T1110 Brute Force    |

## Profile

- Level 1 - Authoritative Name Server
- Level 1 - Caching Only Name Server