A few days ago I have published the updated 3rd edition of “Cisco ASA Firewall Fundamentals” tutorial ebook which covers the latest ASA version 9.x and also is applicable for both the 5500 and 5500-X series of devices. What I have done with the 3rd Edition (in addition to adding a lot of new content) is that I have made sure that all configurations and examples in the book (commands, scenarios etc) will work with the newest ASA v9.x software and also will work on both 5500 and 5500-X devices.
Moreover, I have added extra chapters and I have updated existing chapters with new features and configurations that work on version 9.x. If you have a slightly older version (8.x) the book is still applicable for you. For example, in case of NAT which was completely changed in ASA v8.3 and later, the book includes the commands for pre-8.3 and post-8.3 versions.
As a free bonus with the main ASA Guide, I’m offering also a tutorial with 11 complete configuration examples. In each configuration example I include a network diagram at the beginning with the objectives of the scenario, and then I include the complete ASA configuration commands together with explanations and comments for each command.
The main ASA ebook is full of practical scenarios, examples, troubleshooting information (where necessary), lots of step-by-step configuration commands, some theory where needed, more than 50 colorful networks diagrams and screenshots etc. Currently, this book is the most updated and comprehensive ASA tutorial out there.
Some people are skeptical about buying an electronic PDF ebook and think that a hard-copy book is better. This is wrong in my opinion. With an ebook, you can have it stored on your computer, tablet, smartphone etc and reference it easily when needed. You can search inside and find the content you want without having to keep turning pages of a printed book. Also, the most important advantage of an ebook is that I can update it easily with new features and commands and offer it to existing customers fast.