rsh/rcp/rlogin mystery -- help!

[barrett at crabcake.cs.JHU.EDU]

Dear Wizards:

	I am totally mystified by something happening on our UNIX systems.
The behavior involves "rsh/rcp/rlogin" and machine permissions, and I feel
like I've tried everything.  Can anyone help?  (If so, please respond by
E-MAIL only.)

	I have two DEC VS2000 workstations, "vs1" and "vs2", configured
almost identically.  I also have a VAX called "myHost".  (These are made-up
names to simplify this explanation.)  All these machines are running ULTRIX
2.0.

	The weird behavior is this:  when I type "rsh myHost who" from my
two workstation accounts, vs1 executes the command just fine, but vs2 says
"Permission denied."  Now before you say "Oh, that's OBVIOUS!", consider
this:
	* BOTH vs1 and vs2 have their fully-qualified names, and all
	  nicknames, in the following files on myHost:

		/etc/hosts.equiv
		/etc/hosts.lpd
		/etc/exports		(for NFS)

	* I have NO .rhosts files in any of the 3 accounts.
	* My username is the same on all three machines.
	* The problem has nothing to do with user ID number (I checked
	  this extensively).
	* All three machine have identical /etc/hosts files.
	* My .cshrc file on myHost has no errors in it (to cause "rsh" to
	  bomb out).
	* This problem happens to other users in my situation (same 3
	  accounts), not just to me.
	* I removed all files in my home directories on vs1 and vs2, and
	  the problem did not change.

	At the moment, I believe the problem is not caused by anything I
did, but by some system file or program that says "yes" to vs1 and "no" to
vs2... but I have run out of places to look.  Can anyone help?  Please
respond by E-MAIL only... thanks!

							Dan

#############################################################################
# Dan Barrett	barrett at cs.jhu.edu	(128.220.13.4)	ARPANET             #
#		ins_adjb at jhuvms.bitnet			BITNET              #
#		ins_adjb at jhunix.UUCP			UUCP (unreliable)   #
# Dept. of Computer Science, Johns Hopkins University, Baltimore, MD  21218 #
#############################################################################

ps:	In reality, "vs1" is really four different workstations that exhibit
	this behavior, and "vs2" represents six more.