rsync + ssh

[Paco Martinez]

Hello gurus

I attemp to make a backup between two hosts, using rsync, and result is ok.

But and I agree "-e ssh" to sentence, host backup says

rsync -aurvlpogt  -e ssh kk.txt XXX.YYY.ZZZ::pruebas1
@ERROR: access denied to pruebas1 from unknown (0.0.0.0)
rsync: connection unexpectedly closed (78 bytes read so far)
rsync error: error in rsync protocol data stream (code 12) at io.c(342)

Any idea ??

Thanks...