Lithnet Password Protection for Active Directory is a free, open-source password filter that gives you real control over password quality across your organization. Block compromised passwords using the Have I Been Pwned database, enforce banned word lists that catch common substitutions, and define intelligent complexity policies that reward length - all managed through Group Policy with no additional servers required.
Deploys directly to your domain controllers. No cloud dependencies. No internet access required. Passwords never leave your environment.
Take control of what a strong password means in your organization
Block compromised passwords from being used.
We've made it easy to import the ‘Have I Been Pwned’ data set, but you can also import any plain-text passwords or NTLM hashes that you can get your hands on.
Block passwords based on certain words.
Adding a banned word prevents it from being used as the base of a password.
For example, adding the word 'password' to the banned word store, prevents not only the use of that word itself, but common variants such as 'P@ssw0rd', 'pa55word!' and 'password123456!'. LPP is aware of common character substitutions and weak obfuscations and prevents their use through a normalization process.
Length-based complexity rules.
Reward users who choose longer passwords by requiring less complexity in their passwords. With simple-to-configure group policies, you can define complexity requirements for your passwords that differ by length.
Get started with Password Protection
Download the latest version of Lithnet Password Protection. Free for organizations of all sizes, with no user limits or feature restrictions.
Read the product documentation to learn more about what Lithnet Password Protection can do, and how you can use it to keep your organization safe.
Professional Support
We know that the tools you deploy into your environment need to be ones you can rely on, especially when they play a role in protecting your organization's security. Whether you're a small team or a large enterprise, our professional support agreements are designed to give you confidence and peace of mind. When you need help with troubleshooting, configuration guidance, or just want expert advice, you'll have direct access to the engineers behind LPP - the same people who design, build, and support the product every day.
What's included:
Direct access to the engineering team who built LPP
Troubleshooting and configuration guidance
Priority issue resolution
Peace of mind for auditors and management who need to know production software is backed by vendor support
If you’d like to learn more, simply fill out the form below, and one of our team will be in touch shortly.