Required Ports for Citrix NetScaler Gateway in DMZ Setup
Dive into Citrix ICA protocol – Part1 | Pawel Serwan Blog
Connecting with a Citrix ICA File
Citrix changing default ICA Protocol from TCP to UDP Q4 2017 - Xenit
Configure the Enlightened Data Transport UDP Protocol (EDT) when using the Citrix Cloud Virtual Apps and Desktops – XenApp and XenDesktop Service with the VDA and NetScaler placed in the Microsoft Azure
Explaining ICA Session Reliability, Common Gateway Protocol, on TCP Port 2598