A little over a year ago I gave away over 4,600 copies of my intro to SSH tunneling book, The Cyber Plumber's Handbook, for free over a 48 hour period to the awesome folks here on Hacker News (https://news.ycombinator.com/item?id=19946941).<p>Since then, I've been getting a lot of feedback about creating an interactive lab where SSH tunneling and port redirection techniques can be practiced in real scenarios. With a bit more time during the quarantine, I finally found the time to launch the lab portion. For the HN family, I'm offering the book and 2 weeks of lab time for 50% off ($19.99) with this Gumroad link through May 30: https://gum.co/cph_book_and_lab/hackernews20200523<p>Why learn SSH tunneling?<p>SSH tunneling is a skill you can use for the rest of your IT career. SSH tunneling and port redirection are skills that can be applied in any information technology discipline, so it does not matter if you are a network engineer, red teamer, penetration tester, developer or something in between. That being said, the examples tend to skew towards pairing tunneling techniques with penetration testing tools (including Metasploit).<p>Lab Overview<p>Four jump boxes provide the Internet facing portion of the lab. However, the fun really starts when you start leveraging tunneling techniques to reach the internal side of the network to access services such as Secure SHell (SSH), Web, and Remote Desktop Protocol (RDP). The Linux and Windows targets are also running vulnerable services that can be exploited for the true tunneling ninjas. Each of the exercises has a brief description and solution to assist you in the event you get stuck.<p>Happy Tunneling!<p>Brennon