---
id: 5762
title: "What You’re Missing: Proper LAN Manager Authentication Levels"
source_domain: semperis.com
source_url: "https://www.semperis.com/blog/missing-proper-lan-manager-authentication-levels/"
published_at: "2026-03-11T22:40:10Z"
tags: ["remediation", "active-directory", "privilege-escalation", "windows-security", "ntlm", "semperis", "lan-manager"]
phying_url: "https://phying.com/item/5762"
lang: en
---

# What You’re Missing: Proper LAN Manager Authentication Levels

## Summary

Why LAN Manager authentication level 2 on domain controllers is risky — and how moving to level 3 blocks outbound NTLMv1 while keeping legacy compatibility, a fix you can apply today.

## Intelligence Metadata

- **Sources:** semperis.com
- **Published:** 2026-03-11T22:40:10Z
- **Original:** https://www.semperis.com/blog/missing-proper-lan-manager-authentication-levels/
- **Phying News:** https://phying.com/item/5762