Securing AIX

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Operating Systems AIX Securing AIX - Hardening Lesson 101 Post 302772774 by bakunin on Tuesday 26th of February 2013 07:38:43 PM

02-26-2013

Registered User

Here is my checklist of security-related things i do when i install a new system:

Create administrative FSes
root needs some places to store things: system documentation, logs, scripts, etc.. In most cases there is "/usr/local/bin" and roots home. Create FSes for some or all of these directories so that the content doesn't land in "/". Full root-fses usually cause some headache for the admins.
Install ssh
You need ssh itself and openssl for that. Get both from IBMs Linux Toolbox for AIX website and install with rpm.
Disable "classic" means of connection: telnet, ftp, rlogin, rexec, ....
Notice that you might need rlogin in some cases, but as a rule of thumb all these non-securified services should be disabled. Make sure these will not be started at system start any more.
Disable/limit root-login
The best way to become root is to log on with your regular user-ID and then switch to root. Therefore remote login for root can and should be disabled. Console login should be allowed, because there might be emergency situations where it is necessary. Someone able to get to the console is most probably also allowed to log on as root.
Set up sudo
Download from the IBM site where you got ssh.
Set up ntp
Especially when you use Kerberos you need consistent timekeeping throughout your environment, so connect your system to your local Stratum-2-server. Set the method to "slew" for database systems (i.e. Oracle is quite picky about duplicate timestamps when you set it to "step").
Edit /etc/motd and /etc/security/login.cfg
Its a good idea to be able to immediately recognize at which system you are when you log on. If you put some distinct banners at the login screen chances are you notice them even in times of stress if you have mistyped the machines name. (It is really easy to type "ssh server3" instead of "ssh server2" or something such.)

I hope this helps.

bakunin

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LEARN ABOUT DEBIAN

blaze-list

BLAZE-LIST(1)						    BlazeBlogger Documentation						     BLAZE-LIST(1)

NAME

       blaze-list - lists blog posts or pages in the BlazeBlogger repository

SYNOPSIS

       blaze-list [-cpqrsCPSV] [-b directory] [-I id] [-a author] [-t title] [-T tag] [-d day] [-m month] [-y year] [-n number]

       blaze-list -h|-v

DESCRIPTION

       blaze-list lists existing blog posts or pages in the BlazeBlogger repository. Additionally, it can also display basic repository
       statistics.

OPTIONS

       -b directory, --blogdir directory
	   Allows you to specify a directory in which the BlazeBlogger repository is placed. The default option is a current working directory.

       -I id, --id id
	   Allows you to display a single blog post or a page with the specified id.

       -a author, --author author
	   Allows you to list blog posts or pages by the selected author.

       -t title, --title title
	   Allows you to list blog posts or pages with matching title.

       -T tag, --tag tag
	   Allows you to list blog posts or pages with matching tag.

       -d day, --day day
	   Allows you to list blog posts or pages from the specified day of a month. The value has to be in the "DD" form.

       -m month, --month month
	   Allows you to list blog posts or pages from the specified month. The value has to be in the "MM" form.

       -y year, --year year
	   Allows you to list blog posts or pages from the specified year. The value has to be in the "YYYY" form.

       -n number, --number number
	   Allows you to specify a number of blog posts or pages to be listed.

       -p, --page
	   Tells blaze-list to list pages.

       -P, --post
	   Tells blaze-list to list blog posts. This is the default option.

       -S, --stats
	   Tells blaze-list to display statistics.

       -s, --short
	   Tells blaze-list to display each blog post or page information on a single line.

       -r, --reverse
	   Tells blaze-list to display blog posts or pages in reverse order.

       -c, --color
	   Enables colored output. When supplied, this option overrides the relevant configuration option.

       -C, --no-color
	   Disables colored output. When supplied, this option overrides the relevant configuration option.

       -q, --quiet
	   Disables displaying of unnecessary messages.

       -V, --verbose
	   Enables displaying of all messages. This is the default option.

       -h, --help
	   Displays usage information and exits.

       -v, --version
	   Displays version information and exits.

EXAMPLE USAGE

       List all blog post:

	 ~]$ blaze-list
	 ID: 11 | 2010-07-05 | Jaromir Hradilek

	     Title: Join #blazeblogger on IRC
	     Tags:  announcement

	 ID: 10 | 2009-12-16 | Jaromir Hradilek

	     Title: Debian and Fedora Packages
	     Tags:  announcement

	 etc.

       List all blog post in reverse order:

	 ~]$ blaze-list -r
	 ID: 1 | 2009-02-10 | Jaromir Hradilek

	     Title: BlazeBlogger 0.7.0
	     Tags:  release

	 ID: 2 | 2009-02-11 | Jaromir Hradilek

	     Title: BlazeBlogger 0.7.1
	     Tags:  release

	 etc.

       List all pages:

	 ~]$ blaze-list -p
	 ID: 5 | 2009-02-10 | Jaromir Hradilek

	     Title: Downloads

	 ID: 4 | 2009-02-10 | Jaromir Hradilek

	     Title: Themes

	 etc.

       List each blog post on a single line:

	 ~]$ blaze-list -s
	 ID: 11 | 2010-07-05 | Join #blazeblogger on IRC
	 ID: 10 | 2009-12-16 | Debian and Fedora Packages
	 etc.

       Display a short version of blog statistics:

	 ~]$ blaze-list -Ss
	 There is a total number of 11 blog posts and 5 pages in the repository.

SEE ALSO

       blaze-config(1), blaze-add(1)

BUGS

       To report a bug or to send a patch, please, add a new issue to the bug tracker at <http://code.google.com/p/blazeblogger/issues/>, or visit
       the discussion group at <http://groups.google.com/group/blazeblogger/>.

COPYRIGHT

       Copyright (C) 2009-2011 Jaromir Hradilek

       This program is free software; see the source for copying conditions. It is distributed in the hope that it will be useful, but WITHOUT ANY
       WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Version 1.2.0							    2012-03-05							     BLAZE-LIST(1)