Date: Mon, 7 Oct 1996 14:23:18 -0400 (EDT) From: Brian Tao <taob@io.org> To: FREEBSD-CURRENT-L <freebsd-current@freebsd.org> Subject: "Invalid hostname" as a hostname? Message-ID: <Pine.NEB.3.92.961007140050.22072w-100000@zap.io.org>
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I noticed today that the output from `w', `who' and `last' show
the string "invalid hostname" where the hostname/IP address would
normally appear. As far as I can tell, the affected people are coming
in from a host whose IP address is known in our DNS (this machine is
behind a firewall, thus the RFC1918 addresses). What's invalid about
"jazz.montreal.ican.net" as a hostname vs. "freedom.montreal.ican.net"?
% w
1:45PM up 5 days, 1:11, 53 users, load averages: 3.55, 4.24, 3.68
USER TTY FROM LOGIN@ IDLE WHAT
phil p0 10.1.1.80 1:05PM 25 ssh shine
q p1 slurp 1:10PM 12 slogin trepan (ssh)
q p2 slurp 1:18PM 3 slogin zap (ssh)
g2 p3 fall:0.0 1:42PM - ssh crunch
batsy p5 groovy.io.org Thu06PM 9 ssh zot
jcolvin p7 mosey:0.0 8:29AM 1:11 ssh mail.ican.net
rpbird pa roger.io.org 10:48AM 1 ssh -l roger ican.net
batsy pb groovy.io.org Wed01PM 1:15 -tcsh (tcsh)
khaber pc trip:0.0 7:39AM 7 ssh trepan
jean pd stumble:0.0 9:16AM 44 ssh trepan
q pe stagger:0.0 10:13AM 2:21 -csh (tcsh)
taob pf cabal.io.org Sat07PM - w
g2 pg fall:0.0 9:23AM 26 ssh io.org
batsy pi groovy.io.org Wed01PM 9 ssh zot
khaber pj trip:0.0 7:40AM 25 ssh shine
g2 pn fall:0.0 9:23AM 3:48 ssh crunch
jazzman po invalid hostname 9:40AM 1:01 /usr/local/bin/ssh mail
g2 pp fall:0.0 11:18AM 2:01 ssh -l jake shine
g2 pq fall:0.0 9:23AM 2:41 ssh trepan.io.org
boobie pr boobie 11:21AM 2:13 /usr/local/bin/ssh -l bobbi ican.net
q ps slurp 11:25AM - slogin wave (ssh)
g2 pt fall:0.0 12:16PM 11 ssh trepan
boobie pv boobie 11:32AM 48 /usr/local/bin/ssh -l cathy trepan
maddox q1 duppy.montreal.i 8:37AM 10 /usr/local/bin/./ssh crunch
maddox q2 duppy.montreal.i 8:39AM 10 /usr/local/bin/./ssh -l stephane shine
boobie q3 boobie 11:34AM 1:57 /usr/local/bin/ssh -l cathy empress
maddox q4 duppy.montreal.i 8:46AM - /usr/local/bin/./ssh mail.ican.net
jcolvin q5 nap.io.org 9:08AM 4:36 irc jc nap.io.org (irc-2.8.16beta)
g2 q6 fall:0.0 11:34AM 13 ssh zap
boobie q7 boobie 11:34AM 2:09 /usr/local/bin/ssh -l boobie trepan
jcolvin q8 mosey:0.0 8:09AM 35 ssh shine
jcolvin qa mosey:0.0 8:09AM 35 ssh crunch
jcolvin qb mosey:0.0 8:09AM 1:03 ssh trepan
jcolvin qc mosey:0.0 8:09AM 1:04 ssh trepan
syick qd syick Fri04PM 5 /usr/local/bin/ssh -l syick trepan
jcolvin qe mosey:0.0 9:08AM 4:36 ssh nap.io.org
boobie qf boobie 11:50AM 1:54 /usr/local/bin/ssh -l cathy shine
jazzman qg invalid hostname 11:36AM 42 /usr/local/bin/ssh shine
phil qh 10.1.1.80 12:40PM 22 ssh mail.ican.net
batsy qi groovy.io.org 12:24PM 53 ssh zap
phil qj 10.1.1.80 12:48PM 21 ssh ican.net
khaber Pl trip:0:S.0 7:40AM 49 ssh trepan
khaber Pm trip:0:S.1 7:41AM 10 ssh crunch
bigmac Qo freedom.montreal 8:30AM 30 ssh shine
bigmac Qp freedom.montreal 8:36AM 1:15 ssh mail.ican.net
bigmac Qq freedom.montreal 8:37AM 5:08 -usr/local/bin/tcsh
bigmac Qr freedom.montreal 8:37AM 2:03 ssh trepan
bigmac Qs freedom.montreal 8:37AM 30 ssh crunch
twiggy Qt invalid hostname 11:08AM 1:01 /usr/local/bin/ssh shine
twiggy Qu invalid hostname 11:22AM 45 /usr/local/bin/ssh crunch
twiggy Qv invalid hostname 11:22AM - /usr/local/bin/ssh mail
twiggy R0 invalid hostname 11:26AM 8 /usr/local/bin/ssh trepan
twiggy R1 invalid hostname 11:26AM 8 /usr/local/bin/ssh trepan
% last jazzman
jazzman ttyqg invalid hostname Mon Oct 7 11:36 still logged in
jazzman ttypo invalid hostname Mon Oct 7 09:40 still logged in
jazzman ttypr invalid hostname Fri Oct 4 22:26 - 23:57 (01:30)
jazzman ttypa 10.2.120.26 Fri Oct 4 21:07 - 21:09 (00:01)
jazzman ttypv 10.2.120.26 Fri Oct 4 16:42 - 21:23 (04:41)
jazzman ttyq2 invalid hostname Fri Oct 4 16:26 - 21:23 (04:57)
jazzman ttyq1 invalid hostname Thu Oct 3 09:05 - 15:57 (06:51)
jazzman ttypp invalid hostname Thu Oct 3 08:16 - 15:56 (07:40)
jazzman ttyq4 10.2.120.26 Wed Oct 2 18:31 - 23:58 (05:27)
jazzman ttyp3 10.2.120.26 Wed Oct 2 16:59 - 23:58 (06:59)
jazzman ttyp3 10.2.120.26 Wed Oct 2 16:10 - 16:56 (00:46)
jazzman ttyph 10.2.120.26 Wed Oct 2 16:06 - 16:56 (00:49)
wtmp begins Tue Oct 1 17:01
% fgrep jazzman /var/log/messages
Oct 2 16:06:48 nap login: login from 10.2.120.26 as jazzman
Oct 2 16:10:02 nap login: login from 10.2.120.26 as jazzman
Oct 2 16:59:03 nap login: login from 10.2.120.26 as jazzman
Oct 2 18:31:24 nap login: login from 10.2.120.26 as jazzman
Oct 3 08:16:05 nap login: login from jazz.montreal.ican.net as jazzman
Oct 3 09:05:20 nap login: login from jazz.montreal.ican.net as jazzman
Oct 4 16:26:36 nap login: login from jazz.montreal.ican.net as jazzman
Oct 4 22:26:41 nap login: login from jazz.montreal.ican.net as jazzman
Oct 7 09:40:01 nap login: login from jazz.montreal.ican.net as jazzman
Oct 7 11:36:44 nap login: login from jazz.montreal.ican.net as jazzman
--
Brian Tao (BT300, taob@io.org, taob@ican.net)
Senior Systems and Network Administrator, Internet Canada Corp.
"Though this be madness, yet there is method in't"
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