Sometimes if you attempt to connect to Connection Server using a proxy while on the LAN, an error occurs.

Problem

If the Horizon environment is set up to use a secure connection from the remote desktop to Connection Server, and if the client device is configured to use an HTTP proxy, you might not be able to connect.

Cause

Unlike Windows Internet Explorer, the client device does not have an Internet option to bypass the proxy for local addresses. When an HTTP proxy is used for browsing external addresses, and you try to connect to Connection Server using an internal address, you might see the error message Could not establish connection.

Procedure

Remove the proxy settings so that the device no longer uses a proxy.