Hey! We have a remote site that is currently still connected through
an SDLC circuit and a 539x controller. We would very much like to get
them converted to connect over IP via public wire. The last time I
looked at security issues for such an arrangement, need for a VPN,
etc. was at about V3R7. I'm hoping that someone here can save me the
time of doing a complete new survey of Redbooks on the subject, and
point me to some paper current as of V5R3/4 that summarizes what I
need to know. Many thanks in advance!

-Scott