Article View: comp.sys.sgi.admin
Article #92Re: is wide-open tftpd ever needed for install from remote?
From: Dave Olson
Date: Wed, 06 Jan 1993 21:19
Date: Wed, 06 Jan 1993 21:19
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In <C0G7I2.JM3@helios.physics.utoronto.ca> sysmark@helios.physics.utoronto.ca (Mark Bartelt) writes:
| Last month Dave Dittrich posted an article taking SGI to task for the
| fact that IRIX's initial /etc/passwd includes several accounts which
| have null passwords, a potential worry if the system is attached to a
| network. (He's not the first to grouse about this, nor is he likely
| to be the last.) Anyway, that discussion reminded me of yet another
| security-related issue ...
|
| Section 3.2 of the IRIS Software Installation Guide ("Enabling Network
| Access to Remote Workstations") suggests modifying inetd.conf so that
| tftpd runs in unrestricted mode. I wonder how many people have done
| this, and have forgotten to put tftpd back into restricted mode.
That *exact* same section explictly reminds you to put it back.
It *also* tells you how you can modify the entry to leave security
on, but only allow a couple of directories.
| But my question is, why should this ever be necessary at all? Right
| after suggesting that the tftpd "-s ..." stuff be removed, the guide
| tells us that we might want to consider appending "<CDdir>/dist" (or
| whatever) to the "-s /usr/local/boot" at the end of the tftpd entry
| in inetd.conf instead, which certainly seems preferable.
Because we did *just* that first, and an amazing number of people didn't
seem to be able to handle the typing involved ;)
| Given the security worries related to a unrestricted-mode tftpd, why
| does the documentation even suggest running it that way in the first
| place?
See above.
--
Let no one tell me that silence gives consent, | Dave Olson
because whoever is silent dissents. | Silicon Graphics, Inc.
Maria Isabel Barreno | olson@sgi.com
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Newsgroups: comp.sys.sgi.admin,comp.sys.sgi Path: arc1-ca.pugleaf.net!sparky!uunet!zaphod.mps.ohio-state.edu!darwin.sura.net!sgiblab!sgigate!odin!twilight!zuni!anchor!olson From: olson@anchor.esd.sgi.com (Dave Olson) Subject: Re: is wide-open tftpd ever needed for install from remote? Message-ID: <ui2dla0@zuni.esd.sgi.com> Sender: news@zuni.esd.sgi.com (Net News) Organization: Silicon Graphics, Inc. Mountain View, CA References: <1992Dec24.193457.16465@u.washington.edu> <C0G7I2.JM3@helios.physics.utoronto.ca> Date: Wed, 6 Jan 93 21:19:38 GMT Lines: 36