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Mac OS X Maximum Security
It really didn't concern me until one day when I was checking the logs on my Mac OS X box while developing a web app and discovered dozens of entries from all over the globe probing my box to see if it was an insecure IIS server. I then decided I needed to pay attention to security alerts and the help of a book like Macintosh OS X Maximum Security to help me understand and fix any holes.
The Good
The book is divided into four sections. Part 1 is about learning to think about security, covering such topics as physical security and protection from your users and bad guys. Part II, 'Vulnerabilities and Exposures,' covers the various sorts of attack such as password attacks, trojans and worms, sniffers and spoofing. Part III, 'Specific Mac OS X Resources and How To Secure Them,' covers just that, the various servers such as FTP, mail, Apache and SSH and how to go about making them safe. The final part covers attack prevention, detection, reaction and recovery with topics such as firewalls, alarm systems, logs and disaster planning.
Macintosh OS X Maximum Security is a large, extremely comprehensive volume. For the average person who wants to protect a small home network the information it provides is probably overkill. To make matters worse, the style is fairly verbose, particularly in the first section. Of course, if you want to secure a company network then you may need to know all the information -- and so all this background material is useful, if only so you can reach the right level of paranoia and suspicion.
The book is not a 'recipe' book that tells you "take these steps and you will have a secure machine"; rather it takes you through the possible holes and how to fix them. This approach seems much better for security, since it teaches you a respect for the places you have to open up and a methodical approach to doing so that will hopefully carry over beyond the specifics addressed. Any recipe is bound to have flaws since the operating system and the services are all changing, I'm hoping the methods and style this book have imparted to me will last beyond any changes.
The book also deals well with all the Macintosh-specific stuff, informing you well about such topics as Rendezvous, Apple Remote Desktop, using NetInfo and the like. One aspect that isn't well covered is Airport; securing an 802.11 network is barely touched on.
The Bad
The information provided in all areas of the book is quite detailed, and includes many links to further places to look for more (and more recent) information. Once again, for a book in an ever-changing field like security, this is a huge benefit. I would have appreciated some sort of a small website devoted to the book with the links mentioned gathered together and perhaps some notes on how things may have changed since the book's publication. Unfortunately the Sams Publishing site has a broken link to the book and while the authors say "we are creating a security section for the www.macosxunleashed.com website," no such section exists as I was writing this review. Frankly I am disappointed at this, I think with a book on this sort of topic it behooves either the publisher or author to provide a place for errata, discussion and notes. The best you can do is go to Amazon where you can see the Table of Contents and one chapter. [Ed. Note: The site's errata section is currently up and running.]
My only real complaint with the book itself is the huge size, and the long-winded nature of some of the material. I found the first two sections in particular almost tedious and definitely lecturing in tone. I would have rated this book higher if the editors at Sams had taken a large red pencil to slabs of the first section. Overall, I'd say that while not a 'must buy,' this book will have to do till I find something better, and I expect to loan my copy to several friends.
You can purchase Mac OS X Maximum Security from bn.com. Slashdot welcomes readers' book reviews -- to see your own review here, read the book review guidelines, then visit the submission page.
Any UNIX admins messed around wit OS X?
How secure is it, how secure can it be?
I've read a few articles describing certain features that it has (ease of use and gee-whiz stuff) that sounded to me like a potential vulnerability.
It seemed that a lot of these things were enabled by default and wide open.
I seriously hope this isn't the case. Apple's better than that, right?
I'm not trolling, i'm asking sincerely. With all the "OS X IS UNIX(tm)!!!" fanfare loudly touted in the press, i'd hate to see a major outbreak of compromised OSX machines to blacken the name of all things *nix.
Bottom line: If you're on the internet, paying attention to security is mandatory. Regardless of platform.
do() || do_not();
We need more of these. And more people to read them. How about Outlook Maximum Security?
When I received one box back from servicing today, a botched update completed itself upon booting, and a warning came up that a particular video driver file may be compromising the OS's security, did I want to fix and use, not use, or just use it? Nice. All I have to do is run software update. I want more of that caution built in, but as things stand, keep it up Cupertino.
Damn those pesky terrorists
I think OS X is fairly secure because it's easy to secure.
Apple releases security updates fairly quickly, and their Software Update system makes them available and easy to install for the average user. If I recall correctly, Mac OS X defaults to checking for updates weekly. Installation of updates may require an administrator password, but other than that it's as simple as a couple of clicks.
With my FreeBSD system, I subscribe to freebsd-security-notifications to keep abreast of updates. Knowing when updates are available and knowing how to apply them is probably beyond the average user's ability.
--
the strongest word is still the word "free"
> they don't even use X at all!
What Apple is providing is an Apple-original window system that is graphics model agnostic, as well as a vector drawing system that maps very well to PDF, which is a sort of PostScript without the non-graphical operators. This is packaged under the name 'Quartz' for easy reference by Marketing types.
The window system is designed to support both buffered (like an offscreen PixMap) and unbuffered windows, and is graphics model agnostic, working equally well with QuickDraw, OpenGL, the Quartz drawing engine, X11, and third party solutions, and managing window geometry for the Classic, Carbon, and Cocoa environments. The server portion is a hybridization of screen arbiter and compositor models (and if that's all Geek to you, don't worry about it).
The Quartz drawing engine supports drawing primitives similar to the graphics primitives that might be found in the DPSClient single-operator primitives library for X and NeXTSTEP. There are no math and flow control primitives, as these can be done more efficiently in the native
compiled code. There are no DPS or PS wrappers, as this optimization for server-side graphics is not needed in the Quartz client-side graphics model.
The operations provide imaging and path construction and filling operations as well as some interesting other bits that map well into the direction that 2D drawing is headed. (See Longhorn, or the X raster projects.) The drawing engine can output to rasters (like a window!), as well as PS and PDF streams to feed printers. The Mac OS X printing system takes advantage of the capabilities of Quartz to support all sorts of printers, and make the life of printer driver developers much, much easier.
Things we'd need to add/extend in X Window software (protocol+server+manager+fonts+...):
1) Extend font server and services to vend outlines and antialiased masks, support more font types, handle font subsetting.
2) Extend drawing primitives to include PS-like path operations.
3) Add dithering and phase controls.
4) Add ColorSync support for drawing and imaging operations, display calibration
5) Add broad alpha channel support and Porter-Duff compositing, both for drawing in a window and for interactions between windows.
6) Add support for general affine transforms of windows
7) Add support for mesh-warps of windows
8) Make sure that OpenGL and special video playback hardware support is integrated, and behaves well with all above changes.
9) We find that we typically stream 200 Mb/sec of commands and textures for interactive OpenGL use, so transport efficiency could be an issue.
So, yes, it looks like we can use X for Quartz. All we need do is define extensions for and upgrade the font server, add dithering with phase controls to the X marking engine, add a transparency model to X imaging with Porter-Duff compositing support, make sure GLX gets in, upgrade the window buffering to include transparency, mesh warps, and really good resampling, and maybe augment the transport layer a bit.
Ummm... There doesn't appear to be much code left from the original X server in the drawing path or windowing machinery, and it doesn't appear that apps relying on these extensions can work with any other X server. Just what did we gain from this?
Oh, yeah. My mom can run an xterm session on her desktop now without downloading the Apple X11 package, a shareware X server or buying a software package.
Been there, evaluated that.
For fun a decided to compare open ports on default but updated installs of OSX and XP.
Windows XP Box Port Scan
Max OSX Port Scan
Gentoo Port Scan