This article describes how to create custom page on Citrix ADC prompting users to upgrade older unsupported browsers based on SSL.
Note: According to RFC6176 from Internet Engineering Task Force (ITEF), TLS servers must not support SSLv2. The ADC appliance does not support SSLv2 from release 12.1.

Background

If a client connects to a ADC VIP using an insecure cipher such as SSLv3 they should be redirected to a custom page with a message prompting them to upgrade to the latest version of Internet Explorer, Firefox, Chrome or Safari, because the browser that they are using is out of date and has security concerns.
 

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Instructions

Refer to Citrix documentation for detailed information:
https://docs.citrix.com/en-us/citrix-gateway/13/vpn-user-config/custom-portal/upgrade-older-or-unsupported-browsers.html
https://docs.citrix.com/en-us/citrix-gateway/12-1/vpn-user-config/custom-portal/upgrade-older-or-unsupported-browsers.html
https://docs.citrix.com/en-us/netscaler-gateway/12/vpn-user-config/custom-portal/upgrade-older-or-unsupported-browsers.html

This article describes how to create custom page on NetScaler prompting users to upgrade older unsupported browsers based on SSL.