Defining Cloud Computing

Cloud computing is a very active community. The Google Group gets 600 posts per month and many bloggers are covering the space. However, “cloud computing” is impossible to define in a way that satisfies everyone (or even most). Cloud computing is not alone in this controversy, consider the definition and meaning of “Web 2.0″, “mashups” or “RESTful architecture”. All of these terms are relatively recent. According to Google Trends, these terms became popular to the general public sometime between 2005 and 2007:

• Web 2.0 - often confused with RIA, AKA Social Computing, Long-Tail Apps, Crowdware (2005 by O’Reilly Media)
• Mashup - made popular by Google Maps, AKA Composite/Situational Apps. (2005)
• REST - Has a strict definition, but many don’t understand it and abuse the term. (2006 by R. Fielding)
• Cloud computing - collides with many other terms, such as SaaS, Grid, Utility, PaaS, etc. (2007)

The definition of cloud computing is in progress:

There’s a Darwinian evolution of the exact definition of cloud computing running around. We’re about a country mile away from “knowing when I see it”, which is excellent progress. The cloud to everyone’s silver-lining has enough material to write a 3 volume desktop reference at this point. - Michael Cote, June 2008

Definition #1 - “Cloud computing is the realisation of Internet (”Cloud”) based development and use of computer technology (”Computing”) delivered by an ecosystem of providers. - Sam Johnston, July 2008

Definition #2 - “Cloud computing = network computing. I love the idea of cloud computing, the next evolution of the most network intensive architecture possible, but one that if it works well, is transparent. It’s all about the transparency.” - Douglas Gourlay, Cisco, May 2008

Definition #3 - “There seems to be a group myopia around so-called “cloud computing” and its definitions. What we’re really talking about are “cloud services” of which, “computing” is only a subset…Cloud services are not SaaS. They are far more akin to web services…” - Randy Bias, neoTactics, May 2008

(Anti-)Definition #4 - “Note that I refer to cloud services, not to the could. I am not interested in defining cloud as a term, because I don’t think it’s very useful. For those of us in the distributed computing’s pace

The Working Definition (Winner!):

“…the notion of providing easily accessible compute and storage resources on a pay-as-you-go, on-demand basis, from a virtually infinite infrastructure managed by someone else. As a customer, you don’t know where the resources are, and for the most part, you don’t care. What’s really important is the capability to access your application anywhere, move it freely and easily, and inexpensively add resources for instant scalability.” - Mitchell Crandell, Rightscale, June 2008

Taxonomies of the Cloud Space

Taxonomies are useful to provide insight into a market. It classifies a multitude of players into a smaller bucket.

Andreessen’s Platforms - September 2007

Provided an early taxonomy model for emerging cloud platforms

Platform being a system that can be programmed

• Access API - platform that provides web service endpoints
• Plug-In API - platform invokes your code, that you have deployed remotely
• Runtime Environment - your code runs inside the platform’s process space.

Mehta 11 Layer Stack, April 2008

1. Facilities (space, power, cooling)
2. Network
3. Hardware (e.g. servers Amazon EC2 runs)
4. Hardware virtualization (e.g. Xen for EC2) - optional
5. O/S (e.g. Linux)
6. Systems Management (e.g., tools to manage EC2 instances)
7. Application Middleware (e.g., MySQL on EC2)
8. Application Code
9. Application APIs / Web Services
10. GUI for Application
11. GUI for Application Development / Customization

Croll Cloud Stack, June 2008

7 layer stack within Turnkey app and Generic Platform.

Turnkey app

• SaaS
• Extensible app
• Generic IDE
• Constrained APIs
• App Cluster
• Virtual Data Center
• Virtual Servers

Generic Platform

The bottom of Alistair’s stack includes “root access “style compute clouds.

Robert Anderson, July 2008

3 layer stack

• Software (SaaS)
• Platform (PaaS)
• Infrastructure (IaaS)

This is the model taxonomy for this session.

Related Concepts and Terms

• Infrastructure as a Service (IaaS), Hardware as a Service (HaaS) are synonyms to cloud infrastructure.
• Virtualization
• Hosting
• Autonomic computing
• Distributed computing
• Grid computing

Cloud Applications

• SaaS
• S+S (Software+Services)
• Managed Service Provider (MSP)

However, I got a few emails from my readers asking me something along these line, thus this post. For example, I got asked "Should I focus more on targeting security professionals or general IT users?", "Any pitfalls I should be aware of?" as well as general questions about how to start, what content is best, etc all the way to "How did I profit from my blog?"

Q: Who should I blog to?

A: Blog to colleagues first i.e. infosecurity pros. Blogging to IT or general public is - in some sense - harder or - gasp! - will turn you into a journalist (someone who knows nothing about everything BUT writes about it as an "expert" :-)) Maybe you can broaden it later. Even better, write for YOU (!)

Q: What area of security I should focus my blogging on?

A: Focus on the area of security that you like the most or know them most: IDS? Patching? PIX administration? Linux? AD esoterica? Logs, maybe? :-) Then broaden if you feel like it or as you learn new areas

Q: Any advice on site design, themes, etc?

A: Site design, themes, etc will all come later; just pick something basic and FOCUS on content, not on SEO, design, etc. MUST have RSS feed; make it highly visible (HTML is out, RSS is IN :-))

Q: Any security blogging pitfalls that I should avoid? Any other tips?

A:

• Don't stick to only long, deep posts? Unbelievably, people often prefer shorter posts or a mix of short/shallow and longer/deep posts (that came as a shock to me early on!)
• Tips on how to do whatever useful work well; comments on hot issues (that you understand) works too for a shorter post.
• Definitely comment on other bloggers posts (more often early on, later - as you wish...)
• Avoid long breaks in blogging (>7 days); it will  lead to reader loss (you should only care about it later - focus on fun content first!)
• Join Security Bloggers Network (drop an email to Alan Shimel for it)

Q:  Has blogging in this niche generated any income for you? If so, how much?

A: Exactly $0. The reason is that I never wanted to "monetize" my blog;  I don't have banners, etc. This is by design.

Q: How did it help your professional career in a significant way?

Yes, I think it helped my career and connected me to a lot of fun people! I sure hope I am not "known only as as blogger", but blog can definitely make one much more known professionally, especially if you create fun and/or useful content.

Overall, blog is a time commitment, but it is also a passion. It does help your career, but "forcing " yourself to do it just for "career benefits" is,  IMHO, a wrong approach.

Yo, my fellow bloggers; help the newbies out, will ya?! Let's start a series of posts on "how to be a good security blogger!"

So, Anton Security Tip of the Day #16: Virtually Screwed - Journey Into VMWare ESX Log Analysis

CISecurty guide for VMWare (here) and DISA STIG for virtual machines (here) both mandate collection and analysis of VM platform logs; none goes into enough details on what to look for in logs. Let's try to shed some light on security-focused log analysis of VMWare ESX v. 3.x logs.

First, at least until ESXi becomes the default choice, one needs to keep in mind that ESX as "Linux-inside" and thus diving into /var/log will not reveal any "alien technology" (well, not much :-)). However, one of the most useful logs is /var/log/hostd.N which is not a descendant of Linux standard logs. Extensive VM event records are written into this file.

Let's focus on various types of logins to the ESX platform and identify logs that indicate a successful and failed attempts to log in. Here are a few useful examples to analyze:

Successful logins:

• May 30 09:20:42 esx2 su(pam_unix)[9405]: session opened for user root by jhonny(uid=1626)

This is a classic Linux root login message; you can watch for these by searching VMWare ESX logs for "session AND opened AND user AND root."  Notice the user name of the user who switched to root.

• May 30 09:20:34 esx2 sshd(pam_unix)[9364]: session opened for user jhonny by (uid=0)

This is also a classic Linux message for a normal (non-root) user login.

• [2008-05-25 06:57:48.774 'ha-eventmgr' 111639472 info] Event 40645 : User jhonny@1.1.1.1 logged in

This is a VMWare -specific application login to ESX. You can track such events by username, by event ID or by keywords "event AND logged AND user" (if you are using search)

Failed logins:

• May 30 09:20:31 esx2 sshd[9356]: Failed password for jhonny from 1.1.1.1 port 54773 ssh2

Another classic Linux message from the ESX system; a failure to login due to incorrect password.

• May 27 12:06:59 esx2 sshd[4756]: Failed password for illegal user jonny from 1.1.1.1 port 30594 ssh2

A message indicating a failure to login due to incorrect username (note a typo).

• May 25 07:03:48 esx1 sudo:     jhonny : 3 incorrect password attempts ; TTY=pts/0 ; PWD=/var/log ; USER=root ; COMMAND=/bin/bash

This ESX Linux platform message should also be familiar to Linux/Unix admins: it indicates multiple sudo password failures; look for such messages in the logs.

BTW, do you need to be reminded to track NOT only failed, but also successful login events?!

Overall, you must prepare for the future by learning to analyze  VMWare logs, just like you handled "legacy OS", such as Linux/Unix and Windows.

As I said before, I am tagging all the tips on my del.icio.us feed; here is the link: All Security Tips of the Day.

You can read plenty of other blogs about some of the great presentations at Black Hat.  So I thought I would take another angle and talk about some of the other stuff that may be important to you.

1.  secure@microsoft.com – This years hottest party was again the Microsoft party.  This year it was at the LAX club in the Luxor.  As usual there were quite a number of people at the door who thought they could talk their way in or worse yet were told they “were one the list”.  I was happy to be able to go and saw many of the usual suspects there as well. I had to leave the party early to go catch my red eye flight home, so went right to the airport from the party.  As I wrote earlier, Microsoft is trying really hard on security.  But I couldn’t help but notice the irony of this grainy, lousy picture of the DJ booth at the party.  If you can, notice the computers that the secure@microsoft.com DJs are using. That’s right they are Macs!

2. A new low for booth babes – What would a Shimel review of a trade show be without a booth babe rant.  Hey I recognize it is Vegas and all, but EdgeOS went way over the line this year.  A booth babe dressed as a Las Vegas showgirl or some other type of costume makes a statement.  I personally don’t like exploiting woman to make that statement, but I understand.  However, these guys had woman who were dressed so raunchy and classless, that I could not bring myself to post a picture of them.  Come on guys!  You want to resort to the booth babe thing (and BTW I think the Black Hat crowd does not respond to that), at least have a little class.  These girls looked like street walkers and do you and your company no favors.  Is that really the image you want to promote?  Grow up!

3.  The Security Bloggers Network – We are back!  With the end of the Black Hat show, the SBN is going back to being the SBN.  The old logo is back and our promotion with Black Hat is at an end.  However, I want to personally thank so many of you SBN members who blogged about Black Hat.  The Black Hat marketing folks made it a point to come over to me and thank us for the overwhelming support and help of the community.  Our network delivered big time with them and they are already thinking about ways we can work together next year.  I will keep you all posted on that.

We have several new promotions we are working on with the SBN and will have more on that soon. Also, we learned some valuable lessons.  Next time we will work with the network members more closely in doing these affiliations.  Also, for any show like this we need to have an official bloggers get together.  Not because we don’t want to buy our own drinks (thanks to Chris Hoff for doing more than his share in picking up a big bar tab), but frankly we need to reserve a place that has enough space for us.  Security bloggers are big time. We have a great community of people who get together. Lets make it better.

I have some other ideas around the SBN I am working on too and want to form a committee to help. If you are a member and want to get involved, please drop me a line or comment.

Anyway, another year of Black Hat is in the books. It was a good one and I can’t wait until next year!

Let me run with the pack and put up my own "off to Black Hat" post.  I leave Tuesday actually and won't get there until Tuesday evening.  I will be on a red eye home Thursday night/Friday morning.  In this way I don't break my own three day rule on Vegas.  What is my three day rule?  Suffice to say that it prevents me from spiraling down into the bowels of degeneracy.

So what am I looking forward to at Black Hat?  The Dan K / DNS stuff should be fun.  I will be cheering on my boy Hoff and I always sit in on Jeremiah.  But lets face it, I am there for the party and catching up.  I am looking forward to throwing a few back with Rothman.  Seeing Martin, Mogul and the rest of the bunch.  There are always good parties of course and free drinks and food never hurts.

Of course I will also spend some time at the StillSecure booth shaking hands and kissing babies.  If you would like to say hello feel free to stop on by.

Also, a quick thanks to all of the members of the SBN for their support on our Black Hat affiliation.  The last few weeks have seen a bunch of blogs raising the buzz on the conference.

Let me run with the pack and put up my own "off to Black Hat" post.  I leave Tuesday actually and won't get there until Tuesday evening.  I will be on a red eye home Thursday night/Friday morning.  In this way I don't break my own three day rule on Vegas.  What is my three day rule?  Suffice to say that it prevents me from spiraling down into the bowels of degeneracy.

So what am I looking forward to at Black Hat?  The Dan K / DNS stuff should be fun.  I will be cheering on my boy Hoff and I always sit in on Jeremiah.  But lets face it, I am there for the party and catching up.  I am looking forward to throwing a few back with Rothman.  Seeing Martin, Mogul and the rest of the bunch.  There are always good parties of course and free drinks and food never hurts.

Of course I will also spend some time at the StillSecure booth shaking hands and kissing babies.  If you would like to say hello feel free to stop on by.

Also, a quick thanks to all of the members of the SBN for their support on our Black Hat affiliation.  The last few weeks have seen a bunch of blogs raising the buzz on the conference.

I was reading the Security Bloggers Network feed this morning. I had missed a day or so and had a lot of articles to go through. I was also thinking of what could be the next topic suggested for members to blog about as part of our cross-promotion with Black Hat.  Than I realized there really was not any need.  The topic was obvious, DNS. I didn't do an actual count of how many times it was mentioned (as Mr Bump did with NAC vendors mentioned in the Information Week NAC survey), but there had to be at least a dozen and half, if not more articles on the great DNS leak of 2008. 

Dan Kaminsky's research was exemplary, but his naivete about people keeping the exploit under thier hat was not.  While Thomas Matasano apologized for his mistake, frankly from the moment Havlar Flake begain speculating on it, it was just a matter of time. 

Anyway, the cat is out of that bag, but something tells me that Dan K's presentation will still be a standing room only crowd in just a few weeks in Vegas.  But beyond that there are still a bunch of good topics to be discovered at Black Hat.  Not to mention lots of social activities brewing for both BH and DefCon.  I amreally looking forward to it. I would hope that no one is feeling the air out of the ballon on this one!