See
http://publib.boulder.ibm.com/infoce...t/r0009731.htm
for info on client/server compatibility:
"""
1. A DB2 Universal Database Version 7 server must be configured as a
DRDA application server (AS). This is necessary when you have a Version
8 32-bit client working with a Version 7 32-bit server; or, when you
have a Version 8 64-bit client working with a Version 7 64-bit server.
....
7. When you have a Version 8 32-bit client working with a Version 7
32-bit server, or when you have a Version 8 64-bit client working with
a Version 7 64-bit server, the DB2 Universal Database Version 7 server
must be at a FixPak 8 or later level. The db2updv7 utility must be run
on the server in order for it to be accessible from a DB2 Universal
Database Version 8 client. Once this utility is run on a database, this
database cannot be used with an instance that is at an earlier FixPak
level.
"""
Unfortunately I'm not sure where the docs are that tell you how to
configure the V7 server as a DRDA AS server...
As far as Fedora Core 4 goes, it requires you to install the
compatibility libraries and disable SELinux, otherwise it works
reasonably well with DB2 Version 8. I have had a rough patch for the
DB2 HOWTO lined up for a few months now...