Why no rlogin to nodes?

Bill Northrup nodezero at pacbell.net
Sat Oct 14 20:47:24 EDT 2000


Thank-you for the report from Atlanta sir!  I like the reasoning behind
Scyld releases, I do not have the time to get my hands dirty with allot of
the code, in fact I couldn't if I wanted too! I am really looking forward to
a wulf with a lower TCO and ease..

Disks are in the mail!


----- Original Message -----
From: "Jeff Layton" <laytonjb at mindspring.com>
To: <beowulf at beowulf.org>
Sent: Friday, October 13, 2000 3:51 PM
Subject: Re: Why no rlogin to nodes?

> At 03:20 PM 10/12/00 -0400, you wrote:
> >
> >Walt,
> >
> ><shameless>
> >Run Scyld Beowulf! Our nodes don't even have inetd -- let alone
> >rsh, telnet, or ftp daemons!
> ></shameless>
> Well, I just saw the demo of the Scyld stuff at
> Atlanta Linux Showcase today (at 3:00). It is fantastic!
> I can't even begin to describe what this does for clustering.
> No inetd, not telnet, etc. I think this solves some
> security concerns about cracking the compute nodes
> (unless you crack the master node first, but then
> again, there's really nothing on the compute nodes
> anyway and Beowulf2 can wipe the disk on reboot so
> any cracked files are gone).
> I think there are a couple of pieces left before it
> fulfills my production requirements, but it's darn
> close.
> If you get a chance to test this distribution, do it!
> You won't regret it.
> Jeff
> >
> >Cheers,
> > Dan Ridge
> > Scyld Computing Corporation
> >
> >> I never disabled rlogin (or ftp ot telnet for that matter) on the
> >> nodes of my cluster. Now I have a user who is rlogin-ing to
> >> nodes, then rlogin-ing from there to yet other nodes. Is there
> >> a reason someone would want to do this? Better question,
> >> Is there good justification I can use to now shut off services,
> >> like rlogin, that have been left on previously? I'll need a good
> >> reason I'm afraid...
> >
> >
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> >
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