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IIS Crypto is a free Windows Server/IIS SSL/TLS hardening tool from Nartac Software. It lets administrators enable or disable protocols, ciphers, hashes, and key exchange algorithms; adjust the cipher suite order in IIS; and apply configuration changes via the Windows registry in a way similar to Microsoft documentation and Group Policy. The current version supports Windows Server 2012 through 2025. On Windows Server 2022 and later, TLS 1.3 and HTTP/3 with QUIC are available.
In terms of protection, IIS Crypto focuses primarily on TLS/SSL hardening: disabling weak options such as SSL 2.0/3.0, MD5, and 3DES; enabling forward secrecy; and reducing exposure to attacks such as DROWN, Logjam, FREAK, POODLE, and BEAST. It is deployed as a local GUI or CLI tool and requires administrator privileges. Management features include registry backup, restoring default settings, viewing the current configuration, site scanning, and change logs. Built-in templates include Best Practices, PCI 4.0, Strict, and FIPS 140-2. Custom templates are also supported for reuse across multiple servers, while the CLI version is convenient for scripted execution.
The official description states that IIS Crypto is a free tool, with no paid edition, subscription, or enterprise license disclosed. For compliance, it provides PCI 4.0 and FIPS 140-2 templates to help configure TLS according to those baselines, but it does not state that the product itself has third-party certification.
Its advantages are that it is free, lightweight, and straightforward to use. The GUI is suitable for manual configuration, while the CLI works well for automation. Its template-based approach can significantly reduce errors from manually editing the registry. The downsides are its narrow scope: it does not provide WAF, vulnerability management, asset discovery, or centralized alerting. Server-level TLS changes may also affect compatibility with older clients, so testing and backups are recommended before making changes.
IIS Crypto is well suited to small and midsize teams, operations engineers, and organizations that maintain Windows Server/IIS environments and need to meet TLS baseline requirements quickly. If an enterprise needs centralized policy deployment, audit reporting, and alert integrations, it should be used together with configuration management tools or a more complete security platform. The source text does not provide information on access from China or supported payment methods. Alternatives include Windows Group Policy, PowerShell/registry scripts, and security management products with configuration compliance capabilities.
⚠ This review is compiled from public sources and does not constitute a purchase recommendation. Verify all facts on the vendor's official site. Verify on giddens.net official site.
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