During the last month I have several “chances” to explain people that Citrix Access Gateway Standard and Citrix Access Gateway Enterprise are absolutely different products, and the same is true about their virtual editions (aka VPX). I feel that it is the time to write it down once and share the link from now on…
There are two Citrix products named Access Gateway – Citrix Access Gateway Standard/Advanced Edition (aka CAG) and Access Gateway Enterprise Edition (aka AGEE). Both share similar feature set, hence the common name, but those are different products. CAG is original Citrix product, with latest versions 4.6 and 5.0 (at the moment of writing). After Citrix acquired NetScaler in 2005, they implemented CAG functionality on the NetScaler appliance and named it “Enterprise Edition”. That’s why AGEE versions go after NetScaler version numbers – it is the same appliance, with latest version 9.3 (again, at the moment of writing).
And what is VPX? Access Gateway VPX is a virtual edition of CAG. NetScaler VPX is a virtual edition of NetScaler (that is – AGEE).
UPD (Sep 1): You can read more about the history of this separation here.