Authentication failure over ssh tunnel

[Alan Curtis]

I am trying to set up vnc over an ssh tunnel.

I seem to be able to talk to the server through the tunnel (I have
checked telnet etc.). But I cannot log on, getting an Authentication
failure.

This is the message in the server log.

 Connections: accepted: x.x.x.x::x
 SConnection: Client needs protocol version 3.7
 SConnection: Client requests security type VncAuth(2)
 Connections: closed: x.x.x.x::x (Authentication failure)

I am using OS X, Chicken of the VNC, connecting to a server running on Linux.

I have no problem connecting over a local network.