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backup fails,can't connect to remote host via the filesystem backup module in webmin

I am using the Webmin interface to schedule a backup on hard drive on a different host. I have read to to read but still can 't get it working
i learn its using either rsh or rlogin to connect.
I could connect to the remote host from the local, if i login in as a normal user.I also manupute the .rhosts file and put it in the home directory of the remote user that is suppose to run the backup, still didn't work. i keep getting the error

Performing backup of /etc to pinnbackup@adacp3u7:/PrimaryPatientData/PinnBackup/etc_bkup ..

  DUMP: permission denied
  DUMP: Cannot connect to tape host `adacp3u7'
  DUMP: The ENTIRE dump is aborted.

.. backup failed!

please help
1 Solution
1. Try ping (host)

2. Make .rhost for the servers
pluto  userxx
mars   userxy (or userxx)

The .rhost must by in the home directory (look /etc/passwd)

3. What in .rhost must by in the /etc/hosts


4. .rhost  must to the  all servers (send and recive )

 With ufsrestore and ufsdump  you can with onether server dump and restore.

Example :

ufsdump 0ubf 126 pluto:/dev/rmt/0cn /dev/dsk/c0t8d0s6
make dump from  /dev/dsk/c0t8d0s6 to the tape pluto:/dev/rmt/0cn

ufsrestore -xbf pluto:/dev/rmt/0cn

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