(Real Hacker Attack and Defense Exercise 2nd Edition The author often makes security evaluations for Fortune 500 companies and works on the front line of security. In the first few chapters of this book, the principles of attack to be understood, common sense and lack of protocols are used for specific introduction. How to attack and defense also mentioned that there are more than 500 pages in total about firewall technology, and it touches on very advanced attack methods. In other volumes, find or find hacker attack and defense drills in the resources I uploaded)