Can I get some clue on disabling SSLv1, v3 and TLS1.0 on AIX Post: 302973426

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Operating Systems AIX Can I get some clue on disabling SSLv1, v3 and TLS1.0 on AIX Post 302973426 by bakunin on Tuesday 17th of May 2016 04:16:37 PM

05-17-2016

Registered User

Quote:

Originally Posted by system.engineer

Application/Middleware engineer supposed to work on this task (disabling these protocols)

Exactly. SSL is, basically, implemented as a (shared) library. Applications use from that library whatever they want to use. If they want to use insecure protocols they do it and if they are programmed correctly the don't do it. But from the POV of the library it is simply not its decision.

You can, of course, use some firewall software with stateful inspection and acting as a "transient SSL proxy", in which you could create rules to effectively forbid certain crypto-protocols.

This would be similar (and have similar consequences) to removing, say, "telnet" (the binary) from your system. If there would be a script using this "telnet" it would simply stop working. The applications using the protocols you forbid as outlined above would not be able to make any connection any more (and perhaps stop working, at least in this regard), but they wouldn't start working differently - for the same reason the script would not start to use "ssh" once "telnet" is not available any more.

One more word about these requests, because i got the same nonsense requested three times now: it is typically the request of someone not knowledgeable enough to be in either systems administration or programming, which is whe s/he ended up as "security advisor" and trying hard to make sure everybody else is getting done as little as the advisor himself.

These are the guys who want you to have 27-digits long passwords, containing no known words and at least 8 characters you can't enter from the keyboard, changing them every three days but do not write them down! I bet that in every office with such policies i can find at least one post-it note with the PW under some keyboard. And the number of post-its i will find will increase with the length and overall absurdity of these rules, so they won't increase but in fact decrease security.

I hope this helps.

bakunin

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LEARN ABOUT DEBIAN

lm-profiler

LM-PROFILER(8)						      System Manager's Manual						    LM-PROFILER(8)

NAME

       /usr/sbin/lm-profiler - laptop mode profiler

SYNOPSIS

       /usr/sbin/lm-profiler

DESCRIPTION

       This  manual page documents briefly the /usr/sbin/lm-profiler command. lm-profiler is a tool for profiling disk operations. It is a part of
       laptop mode tools and is useful only in relation to rest of laptop mode tools. It helps you to detect programs and  services  that  use	up
       system resources and that cause disk activity, and it allows you to disable them when laptop mode is active.

       When  you start lm-profiler, it will execute a "profiling run", which can take some time. Start lm-profiler when you are working on batter-
       ies, preferably, because that will allow it to analyze the actual situation that it is supposed to optimize. During the profiling run,  you
       can  use  your system normally; however, any disk activity caused by your actions will end up in the profiler's results. When the profiling
       run is finished, you will be presented with a list of programs that deserve your attention, either because they listen on a network  (which
       is  not	usually  useful when you are working offline) or because they caused disk activity in a disk-spindown-unfriendly pattern. When lm-
       profiler can guess an init script that belongs to a program, it presents you with the opportunity to disable the program when you are work-
       ing  on battery. It does this by placing a link to the init script in /etc/laptop-mode/batt-stop. Any programs that lm-profiler cannot find
       an init script for is simply reported, so that you can stop the program manually if you want to.

       WARNING ABOUT DISABLING PROGRAMS: It may not be safe to disable some programs. They may be needed for proper operation of your system. Dis-
       able services only if you know what they do and why you don't need them.

FILES

       /etc/lm-profiler.conf
	      lm-profiler retrieves its profiling rules from this file.

SEE ALSO

       lm-profiler.conf(8).

       laptop-mode.conf(8).

       daemons.conf(8).

AUTHOR

       This manual page was written by Bart Samwel (bart@samwel.tk) and Jan Polacek (jerome@ucw.cz) for the Debian system (but may be used by oth-
       ers).  Permission is granted to copy, distribute and/or modify this document under the terms of the GNU General Public License,	Version  2
       any later version published by the Free Software Foundation.

       On Debian systems, the complete text of the GNU General Public License can be found in /usr/share/common-licenses/GPL.

																    LM-PROFILER(8)