02-07-2012
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No.
It is only a secure connection from B to C. (That's assuming that your VPN is secure!).
Hard (for me) to guess how you might do this type of connection without getting cut off when you start the VPN at B.
VNC A to B, then VPN B to C ? Needs some sort of split-tunnelling or two LAN connections. ... or a dumb terminal and two modems?