IGEL Cloud Gateway 1.04 ICG How-Tos Current: Managing ICG Certificates with UMS PDF Download PDF Download page Managing ICG Certificates with UMS. Current page Include child pages All pages Managing ICG Certificates with UMS The Universal Management Suite (UMS) has a built-in TLS/SSL certificate manager to be used with the IGEL Cloud Gateway (ICG). It produces keystore files suited to the ICG installer. Certificate Signing Options Using a Publicly Known CA in UMS ×