Thanks Reece, but my Informix database is on Red Hat Linux 2.6.18-164.11.1.el5. I am attempting to connect from Windows 7. You mentioned that the DRDA provider is configured with the INFORMIXSERVER and other environment information. Do I need to configure something on my client side?
On the server, I have setup the sqlhosts, added the DBSERVERALIASES in the onconfig file, and opened up the port in iptables (firewall config). Our linux server is not configured with domain authorization, so all the user accounts are local. Are there more configuration options I could be missing?