You can use the following tools to diagnose connection problems that your users might encounter when trying to establish a host connection:

Rumba Trace tool
Traces and records SNA and link layer communication sessions. These trace options can have an impact on your system performance, so it is best to use them as a filter to sift through your communication sessions when isolating a problem.
Rumba Event Viewer
Works in the background collecting information at timed intervals that you can set, and keeps an event log organized by Data, Time, Source, Event ID, Type, and Computer.
Note: The Rumba Event Viewer is very similar in appearance and functionality to the Windows Event Logger.