ICA
This signature detects Independent Computing Architecture (ICA), which is the core of the Citrix Presentation Server product line that enables a Windows or Unix server to run an application for multiple users simultaneously, while sending only the changes in the user interface to the client machine. By default, ICA uses TCP port 1494 or UDP port 1604.
Available to all SRX running 12.3X48+
Available to all MX running 20.2R1+
Available to all vSRX running 20.3R1+