rsync via tunnel - 3 boxes separated by internet

[Jay Strauss]

Christoph Biedl wrote:
> Jay Strauss wrote...
> 
> 
>>Questions:
>>
>>1) Is there a way to do this without setting up an rsyncd on the target box?
> 
> 
> You could tunnel ssh-over-ssh instead of rsync-over-ssh. Pitfalls:
> - tcp-over-tcp considered harmful, so do this on the more reliable link.
> - ssh will give LOUD warnings about changed host keys.
> 
>     Christoph

Can you give an example of "tunnel ssh-over-ssh"? I've been trying be 
can"t get the syntax correct

thanks Jay