On Thursday evening, we have enforced TLS 1.2 on one of our NetScaler’s (Citrix gateway component). Due to this change, we see an increase on our Support of clients who cannot connect to their applications. If you or your client are receiving a “SSL error 4” error, you must update the citrix client on your device. To view a (variation) of the error message, have a look at https://downloads.aspex.be/sslerror4.png
To update the citrix client on Windows devices, we advise to first use the “Citrix Receiver Cleanup utility” to completely remove the current installation. You can download it here: https://downloads.aspex.be/ReceiverCleanupUtility.exe
. Afterwards, you can install the latest version of the citrix client manually. You can download it from: https://www.citrix.nl/downloads/citrix-receiver/windows/receiver-for-windows-latest.html
It is important to close all your browser windows (internet explorer, google chrome, firefox, edge) before performing the installation.