[Dump-users] Dump Over SSH fails

[Ubaidul K. <ukh...@ho...>]

I attempting to backup a Redhat Linux Machine(Linux  2.6.18-8.1.1.el5xen 
x86_64) without a tape drive to another Redhat Linux Machine(Linux  
2.6.18-8.1.1.el5xen x86_64) with a tape drive.  I have some backup scripts 
that login to remote machines over ssh and call scripts that start dump over 
ssh.  The machines are setup in the following way:

1.  operator - This group exits on all machines
2.  sysop - This is the user that's invoking dump on all machines - this 
user is also part of the following groups:  operator disk wheel
3.  The sysop environment includes the variable RSH which is set to 
"/usr/bin/ssh"
4.  Public key authentication has been setup between the machines so sysop 
can login from one machine to the other and back and forth.  I verified this 
and it works(I can ssh to the remote machine and from that machine I can ssh 
to the machine with the tape drive and run commands).

The backup system works in the following manner:

  M1  ---sysop-ssh-login(invoke dump)---->  M2
  M2  ---dump-over-ssh--->  M1:/dev/nst0
  [sysop@M1 ~]$  ssh -T -v M2 "/sbin/dump -0 -f M1:/dev/nst0 /boot"

The error message I am getting is:
  DUMP: rcmd: socket: Permission denied

However I can successfully run dumps, if I login to M2 over ssh to an 
interactive shell(bash) and run:

  [sysop@M2 ~]$/sbin/dump -0 -f M1:/dev/nst0 /boot

Any help/suggestion is greatly appreciated.

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