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Date: Fri, 25 Oct 1996 23:00:29 -0700
From: Craig Shaver <craig@progroup.com>
Organization: Productivity Group, Inc.
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Subject: Re: remote tar/rmt + kerberos
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Larry Dolinar wrote:
> 
> |  From:          "Craig Shaver" <craig@ProGroup.COM>
> 
> |  I have a question about doing a tar to a device on another host.
> |  Using the tar command does not seem to work.  The man page says
> |  you should be able to do "tar -cvf otherhost:/dev/rst0 local.files". But
> |  this just hangs.  Does anyone use tar to do backups to a remote device?
> |
> 
> What user are you doing this under, root?  If so, otherhost:/root/.rhosts
> needs to allow access to your host.  If not root, then the same user must
> exist on both, and /etc/hosts.equiv is involved.
> 
> But it normally will come back and say "permission denied" if you haven't
> set this up.  The waters get muddier of NIS is deployed; can't touch that
> one.
> 
> The older style (from Sun manpages):
> 
>  tar cvfb  -  20 filenames | rsh host dd of=/dev/rst0  obs=20b
> 
> I've never tested it under FreeBSD, but the rsh considerations
> (/etc/hosts.equiv and/or ~root/.rhosts) still apply.  We did use this
> approach with the Suns and it worked.
> 
> cheers,
> larry

Thanks to both Larry and Jonny.  I was trying to use the remote tape as
root, and it works when I set it up properly.  However, I am having problems
going from a 2.1.5R system to a 2.1.0R system.  I can use the remote tar
going from the 2.1.0R box to the 2.1.5R box.  Unfortunately, the tape drive
is on the 2.1.0R box.  I have a Solaris 2.4 box that can use the tape on 
the 2.1.0R box.  Solaris doesn't seem to be as picky as 2.1.5R.

I suspect the 2.1.5R is trying to use kerberos authentication with the 
2.1.0R box and fails.  I thought it should give me a message, but it just
hangs.  When I do an rsh to the 2.1.0R box from the 2.1.5R box it hangs
the same as the rmt tar does.  But when I do a rsh -K (no kerberos option)
it works.  Can anyone shed some more light on this?  Will this happen
with other types of Unix?  Is there a workaround?

just curious,

-- 
Craig Shaver  (craig@progroup.com) (415)390-0654 
Productivity Group POB 60458 Sunnyvale, CA  94088