# Disable old (unsecure) IIS protocols

It is highly recommended to disable old protocols like

- TLS 1.0
- TLS 1.1
- 3DES

#### How to do this

1. Download *IIS Crypto* developed by *Nartac Software*: [https://www.nartac.com/Products/IISCrypto](https://www.nartac.com/Products/IISCrypto)
2. Start IIS Crypto as Administrator
3. Disable everything, and then enable the following items:  
    [![image.png](https://docs.mxsuite.nl/uploads/images/gallery/2026-06/scaled-1680-/qlCimage.png)](https://docs.mxsuite.nl/uploads/images/gallery/2026-06/qlCimage.png)
4. Press **Apply**
5. Restart the PC (best practice) or restart IIS.

<p class="callout info">TIP: check your MXSuite website via the Site Scanner option</p>