RE: iSeries vs. Unix vs. SQL Server vs. Oracle &Security/Dataseparation???

> For clients with absolute security requirements, I recommend a public
> webserver (FreeBSD is a nice choice) in the DMZ talking to an
> application server on an iSeries also in the DMZ talking to a second
> iSeries behind the DMZ.  All communication between the iSeries boxes is
> through distributed data queues using SNA.
>
> No TCP/IP traffic between the two machines.  Makes hackers crazy <grin>.

That's a great idea...

Another alternative would be to have the FreeBSD machine talk to the
iSeries via a null-modem cable on a serial port.  This would be
significantly more secure than SNA, since once a hacker managed to
compromise machines in the DMZ, he could only access a single program on
the iSeries (the one that's reading the serial port).

With a full SNA connection, the hacker could potentially use SNA or APPC
or raw ethernet packets to get to your "safe" system.   Granted, there
aren't many hackers with familiarity with SNA, but it would only take one,
and I'll always take physical security over "security by obscurity."

Of course, a serial connection is significantly slower than a network
connection, so you'd have to plan the application so that only relatively
small amounts of data need to be transferred over the serial link... but
it seems to me that the large data is things like images, java applets,
etc which don't really need to be on the "Safe" machine.

Just throwing out an idea...