For WordPress hosting (tariffs before September 26, 2022) and Webhosting

With CDN powered by CloudFlare, we offer you a powerful Content Delivery Network (CDN). With CloudFlare's 62 global networks, you can improve the performance and security of your website - no matter where your visitors are.

How to activate CDN powered by CloudFlare:

  • Log in to your IONOS account

  • In the main navigation, click Menu at the top left and then Hosting.

  • In the CDN area, click Activate Now.

    The "Activate CDN package" page appears.

  • Select the domain for which you want to activate the CDN.

  • You will now see a list of the subdomains created for your domain. Select the subdomains for which the CDN function should also be activated.

  • The CDN can only be enabled for subdomains, not the main domain, so you need to make sure that the content you want to distribute through the CDN is accessible on subdomains.
  • You cannot assign subdomains with custom DNS settings to your CDN package.
  • Also, you cannot assign subdomains that handle things like email, FTP, or SSH traffic.
  • Adapt the settings of the CDN package to your needs. In the general settings, select the functions you want. To do this, click Edit.

    • You can use the predefined performance settings profiles to optimize the performance of your website. Select Standard, Advanced or Expert here, or click the Edit button for custom settings.

    • In the security settings, select the security profile you want, or click Edit for custom settings.


If you have already secured your domain with an SSL certificate, you must enable the Full SSL encryption setting. You can find this option in the general CDN settings under SSL. Otherwise, after activating the CDN, you may receive the error message "Too many connections" when you access your website.

  • Click Activate.

  • To activate the CDN, confirm the general terms and conditions of IONOS and the terms of use of CloudFlare by clicking Accept and activate CDN Plus.

Your CDN package will be activated within a few hours.

  • Note
  • If you don't see the Activate button here, you have already activated your CDN package at an earlier point. In this case, click Save at the end of the settings.

Activate CDN for additional subdomains

To activate CDN for additional subdomains of your hosting package, repeat the steps above for the desired subdomains.