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Operating Systems AIX Securing AIX - Hardening Lesson 101 Post 302772833 by MichaelFelt on Wednesday 27th of February 2013 01:58:40 AM

02-27-2013

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Now is a good time to look at so-called Role Based Access Control solutions - aka RBAC, rather than sudo. IT audit requirements are moving in this direction.
If you go sudo - it is not enough to install it and let everyone just sudo su -.

And be sure and define a seperate group, no files in it, only admins, with are allowed to su to root (sugroups setting for root is the name of this group, default is keyword ALL - meaning any group is accepted)

AIX supplies ssh on the DVD with AIX 6.1 and AIX 7.1, no additional download needed.

Big plus on suggestion to setup non-rootvg filesystems (i.e., not just a seperate filesystem, but have an additional volume group for these items, so that "rootvg" can be replaced (e.g., fresh install) and you will not lose any vital configuration information by accident. Not saying the steps to "replace" rootvg are simple, but this is much simplier than losing the info, or having to extract outdated information from an "ancient" mksysb backup file.

edit motd: yes, but a standard message for all systems - best practice seems to be to mention that only authorized users are permitted, and actions may be logged. Proceding implies consent and other "legal stuff".

Important change: change the pwd_algorithm setting (none set, so crypt by default) in /etc/security/login.cfg

All the other edits, disabling programs, root login, etc. - just use
# aixpert -l h (or #aixpert -l high)

MichaelFelt

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LEARN ABOUT DEBIAN

viewsudo

VIEW-OS(1)						      General Commands Manual							VIEW-OS(1)

NAME

       viewsudo - execute a command as another (virtual) user

SYNOPSIS

       viewsudo [-g groupname|#gid] [-u username|#uid] command

DESCRIPTION

       viewsudo allows a user to execute a command as the superuser or
	      another user in View-OS.

OPTIONS

       viewsudo accepts the following command line options:

       -g group
	   Normally,  viewsudo	sets the primary group to root.  The -g option causes sudo to run the specified command with the primary group set
	   to group.  To specify a gid instead of a group name, use #gid.  When running commands as a gid, many shells require	that  the  '#'	be
	   escaped  with  a  backslash	('[u2019]).   If  no -u option is specified, the command will be run as the invoking user (not root).	In
	   either case, the primary group will be set to group.

       -u user
	   The -u option causes viewsudo to run the specified command as a user other than root.  To specify a uid instead of  a  user	name,  use
	   #uid.  When running commands as a uid, many shells require that the '#' be escaped with a backslash ('[u2019]).

RETURN VALUES

       Upon successful execution of a program, the exit status from viewsudo will simply be the exit status of the program that was executed.

SEE ALSO

       viewsu(1), sudo(1), linux.defs(5)

AUTHORS

       View-OS is a project of the Computer Science Department, University of Bologna. Project Leader: Renzo Davoli.
       <http://www.sourceforge.net/projects/view-os>

       Howto's and further information can be found on the project wiki <wiki.virtualsquare.org>.

NOTE

       Most part of the text is taken from sudo(1).

VIEW-OS: a process with a view					  August 8, 2009							VIEW-OS(1)