rsync works with vpns?

[Brian]

Hi,
Does rsync treat vpns to a third machine differently?  I assumed it 
wouldn't rsync the files on a remote machine, C to server A, but it is.

E.g., Linux Rsync Bkup Server A < ----- > FreeBSD file server B 
<---VPN---> file server C. Rsync transfers the VPN'd files with 
seemingly with no complaints.

Are there any caveats I should be aware of?

Brian


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