> For the complete documentation index, see [llms.txt](https://docs.parallels.com/landing/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.parallels.com/landing/ras-reference-architecture/v20/port-reference-and-ssl-certificates/ssl-certificates.md).

# SSL Certificates

This section explains how to use SSL certificates in Parallels Application Server deployments. You should read this section if you are setting up a RAS environment to test one or more of the deployment scenarios described earlier in this guide.

{% hint style="info" %}
**Note:** For complete information, please also read the **SSL Certificate Management** chapter in the **Parallels RAS Administrator's Guide**.
{% endhint %}

By default, a self-signed certificate is installed on a RAS Secure Gateway. Each RAS Secure Gateway has its own certificate, which should be added to Trusted Root Authorities on the client side to avoid security warnings.

To simplify the Parallels Client configuration, using a certificate issued either by a third-party Trusted Certificate Authority or Enterprise Certificate Authority (CA) is recommended.

If an Enterprise CA certificate is used, Windows clients receive a Root or Intermediate Enterprise CA certificate from Active Directory. Client devices on other platforms require manual configuration.

If a third-party certificate issued by a well-known Trusted Certificate Authority (e.g. Verisign) is used, the client device trusts using Trusted Certificate Authority updates for the platform.


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