When launching an application through Citrix Gateway, the following error is displayed:
"Cannot connect to the Citrix XenApp server. The Citrix SSL server you have selected is not accepting connections"

Important! This article is intended for use by System Administrators. If you are experiencing this issue and you are not a System Administrator, contact your organization’s Help Desk for assistance and refer them to this article.

Complete the following steps to troubleshoot this issue:

1. Verify that ports 8080, 1494, 80, 2598, 443 or any other manually assigned ports are open from the Citrix Gateway to each CVAD server. To verify, run a telnet from the Citrix Gateway to each CVAD server on the ports in question.

2. Ensure that the latest version of Workspace is installed.

3. Ensure that the Secure Ticket Authority (STA) on the Storefront and Citrix Gateway match and also ensure that the sequence of STA matches.

4. Ensure that there is no certificate trust issues.

5. Ensure that the certificate chain is complete.

6. If the certificate is not issued by a Certificate Authority and is self-signed then ensure that the root certificate is imported to Storefront.

7. If you are using Internet Explorer then, add the website to the compatibility view list and also under trusted websites.

Refer to the Additional Resources section of this article for more information.

• CTX101810 - Communication Ports Used by Citrix Technologies

• Citrix Documentation - Integrate CItrix Gateway and CVAD

• Fix site display problems with Compatibility View

• Citrix Workspace

• Certificate-Based Troubleshooting Guide - https://support.citrix.com/article/CTX256666