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VNC is excellent software (made by AT&T) but I wouldn't use it in any environment where security is important - it sends passwords etc. all in plain text as I recall.
That's why you tunnel it over an SSH2 connection :) There are instructions about how to do it on the AT&T web site for VNC. Just make sure that it doesn't decide that since it's on a "local" connection it should use the "raw" encoding type - it's dog slow.