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Wow, V4R2... That's like taking a trip in a time machine!
I wasn't sure when VPN became available in OS/400, it is just a feature I
just take for granted now. But after asking a few questions, I found out it
was available as part of the firewall product on V4R3 and
then became available natively in V4R4.
I believe you answered your own question...
"What are some good reasons I can give management why we need to upgrade to
at least 5.1 or 5.2."
The best reason in my opinion, for keeping current with the latest OS, is to
have access to all the new features that continue to be added to OS/400. You
seem to require access to your system over a VPN and VPN access is available
on the iSeries. IBM spends millions of dollars a year enhancing the operation
system for the AS/400 and iSeries. However, in order to have access to all
this new function you have to make a concerted effort to stay current. If
you upgrade as each new release comes available, the upgrades process is
usually quite routine and any new feature can be absorbed by you and your
company slowly over time. However, since you are now so far behind, you will
have to do multiple upgrades to reach V5R2 and some of the everyday look and
feel of the OS user presentation level may have changed significantly,
making this upgrade even harder on your user base.
If you "need" the VPN function, you will have to bite the bullet and
upgrade. This will cost money and your system will be down for several
hours, possibility days, while you do this.
My advice to you in the future is to plan for the long term and stay
current. It is a much easier way to administer the AS/400 and iSeries
platforms. ==================================
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