TSIM 10.5 was connected ok to TSPS 10.5 but since upgrading TSPS to 11.0 it no longer connects.
All the ports required for TrueSight 11.0 have been checked and are open as expected.
TSIM changed from using JBoss in versions up to and including 10.5 across to Wildfly in versions 10.7 and later.
This means when all components are 10.7 or later port 2100 is not needed.
However, it TSIM 10.5 is connecting to a later version of TSPS (This is supported up to 11.0) then port 2100 still needs to be open for TSIM 10.5 to connect to the TSPS.