[5561] in testers
Athena 9.2.7: sshd? tcsh? sets bogus REMOTEHOST
daemon@ATHENA.MIT.EDU (Ken Raeburn)
Tue Jun 24 15:06:36 2003
To: testers@mit.edu
From: Ken Raeburn <raeburn@MIT.EDU>
Date: Tue, 24 Jun 2003 15:06:34 -0400
Message-ID: <tx17k7bfg79.fsf@mit.edu>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
If I'm running a command remotely under ssh, and not actually logging
in, REMOTEHOST is set for the command, usually to "0.0.0.0", and
sometimes to rather random values:
% ssh dcl.mit.edu -o 'ForwardAgent yes' -x printenv
KRB5CCNAME=/tmp/krb5cc_p15502
USER=raeburn
LOGNAME=raeburn
HOME=/afs/athena.mit.edu/user/r/a/raeburn
PATH=/afs/athena.mit.edu/user/r/a/raeburn/lib/sun4:/afs/athena.mit.edu/user/r/a/raeburn/lib/scripts:/u1/kr/krb5-1.2/Install/bin:/u1/kr/krb5-1.2/Install/sbin:/u1/kr/gnu/bin:/mit/krbdev/arch/sun4x_59/bin:/mit/sipb/arch/sun4x_59/bin:/mit/emacs/bin:/srvd/patch:/usr/athena/bin:/usr/athena/etc:/bin/athena:/usr/openwin/bin:/usr/openwin/demo:/usr/bin:/usr/ccs/bin:/usr/sbin:/sbin:/usr/ucb:/etc:/usr/etc:/etc/athena:/mit/watchmaker/arch/sun4x_59/bin:/mit/gnu/arch/sun4x_59/bin
SHELL=/bin/athena/tcsh
TZ=US/Eastern
SSH_CLIENT=18.18.1.71 53308 22
SSH_CONNECTION=18.18.1.71 53308 18.18.1.70 22
KRBTKFILE=/tmp/tkt_p15502
XAUTHORITY=/tmp/xauth-raeburn-15505/Xauthority
HOSTTYPE=sun4
VENDOR=sun
OSTYPE=solaris
MACHTYPE=sparc
SHLVL=1
PWD=/afs/athena.mit.edu/user/r/a/raeburn
GROUP=mit
HOST=dcl.mit.edu
REMOTEHOST=0.34.82.241
ENV_SET=
EDITOR=emacs
MM_CHARSET=iso-8859-1
MANPATH=/usr/athena/man:/usr/openwin/man:/usr/dt/man:/usr/man
LD_LIBRARY_PATH=/usr/openwin/lib
OPENWINHOME=/usr/openwin
ATHENA_SYS=sun4x_59
ATHENA_SYS_COMPAT=sun4x_58:sun4x_57:sun4x_56:sun4x_55:sun4m_54:sun4m_53:sun4m_412
MAKEOPT=-w
LANG=C
XUSERFILESEARCHPATH=/usr/athena/lib/X11/app-defaults/%N
[all-in-one.mit.edu] {~}
<38 14:29> % ssh dcl.mit.edu -o 'ForwardAgent yes' -x printenv REMOTEHOST
0.50.178.241
[all-in-one.mit.edu] {~}
<39 14:30> % ssh dcl.mit.edu -o 'ForwardAgent yes' -x printenv REMOTEHOST
0.0.0.0
[all-in-one.mit.edu] {~}
<40 14:30> % ssh dcl.mit.edu -o 'ForwardAgent yes' -x printenv REMOTEHOST
0.0.0.0
[all-in-one.mit.edu] {~}
<41 14:30> % ssh dcl.mit.edu -o 'ForwardAgent yes' -x printenv REMOTEHOST
0.0.0.0
I can't find anything in my dotfiles that touches REMOTEHOST, and I've
seen the "0.0.0.0" very often. I don't even seem to be able to
reproduce the non-0 result right now.
For interactive logins, it seems to get consistently set to the
correct remote host name.
I assume the intent is to use "0.0.0.0" to indicate "unknown remote
host" as opposed to "local", but there seems to be an occasional
glitch...
Ken
