VNC and FTP Servers

I'm running an ftp server on one of my computers.  I also have a VNC server on the same computer. This computer has OS2 for the operating system. My question is, if I wanted to run an ftp server or VNC server on one of my other machines running WinXP and Win7, could I do it?
I use the port-forwarding feature of my D-Link  DI-524 router to connect external connections to the ftp and VNC ports to the OS2 machine.
How would I set it up so that I connected to the correct machine from outside? I use the standard ports and usually access VNC from a Win7 laptop at work and my ftp server from there and from my laptop running OS2. Please advise.
Robert EhingerIT specialistAsked:
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Miguel Angel Perez MuñozConnect With a Mentor Commented:
Yes, you can but must change your VNC and FTP port, and do nat translations according this new ports.
Jim Dettman (Microsoft MVP/ EE MVE)Connect With a Mentor PresidentCommented:
Sure.   Each must have a unique port though.  You can't have both VNC and FTP using the same port.

I sure hope you're using SFTP and some sort of secure plug-in or tunnelling with VNC. Both FTP and standard VNC are unsecure (FTP sends everything as cleartext, for example) and thus aren't really recommended for use over the internet.

OS X's screen sharing in particular is unsecure if you're using a VNC password for it:
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