HP T5530 - Compaq Thin Client Administrator's Manual page 41

In the SSL/TLS Relay section, type the relay address and port for the Socket Security Layer (SSL) or
Transport Layer Security (TLS) protocol.
If the firewall uses address remapping, you must configure the client to use the alternate address
returned by the data collector by selecting Use alternate address through firewalls. This is necessary
whether or not you are using a SOCKS or secure proxy server.
ENWW 33
Global ICA Client Settings