us robotics 8022 router and vnc

Archived from groups: comp.security.firewalls (More info?)

Hi!I have local lan and a us robotics 8022 router connected to internet with
cable modem with the following properties:automatic passthrough of encrypted
data through NAT, PPTP packets are
allowed to pass through, router supports IPSEC.what means that router
properties at all?Behind that router I have a local lan.My questions:I want
to make a connection from anywhere on the world with vnc to my computers on
my local lan.The os of that computer that make the connection is windows
xp.What must I on my router end elsewhere configure?How can I make that vnc
connection secure from my windows xp computer to any computer local on my
lan?Thanks!