Computer Security Training
Computer Security Training

Learn how to secure your business from attacks with our practical security courses, taught by top experts in their fields.

The Best TLS and PKI
Training (Remote)

Designed by Ivan Ristić, the author of the much acclaimed Bulletproof SSL and TLS, the
SSL Labs server test, and—most recently—Hardenize monitoring tools, this practical two-day training course will teach you how to deploy secure servers and encrypted web applications and understand both the theory and practice of Internet PKI.
Next training: Remote, 10-13 May 2021

ModSecurity / OWASP
Core Rule Set

This two-day course by Christian Folini, coauthor of our ModSecurity Handbook 2nd Ed, will help you set up an Apache webserver and install ModSecurity together with a tight ruleset. We will configure the server and talk about every single detail of the configuration to give you an expert understanding of how your server works and behaves.
Next training: Dates coming soon

Bulletproof TLS Newsletter

Bulletproof TLS Newsletter is a free notification service that brings you fresh SSL/TLS and Internet PKI news. This newsletter came out of need to send regular and sometimes urgent notifications to the readers of our books interested in encryption. We send newsletters once a month, and more often if there is an urgent security problem that needs addressing. MORE »

SSL/TLS and PKI History

A comprehensive history of the most important events that shaped the SSL/TLS and PKI ecosystem, based on our book Bulletproof SSL and TLS. MORE »

Our Books

The complete guide to deploying secure servers and web applications.This book, which provides comprehensive coverage of the ever-changing field of SSL/TLS and Web PKI, is intended for IT security professionals, system administrators, and developers, with the main focus on getting things done.

This free book provides complete coverage of OpenSSL command-line operations. The first chapter covers installation, configuration, key and certificate management. It also includes instructions on how to create your own private CA. The second chapter focuses on TLS server configuration testing.

The definitive guide to the popular open source web application firewall, written by Christian Folini and Ivan Ristić, the principal author of ModSecurity. This book contains everything you need to successfully deploy and maintain a ModSecurity installation, in one place.

Apache Security 2005  FREE
This all-purpose guide for locking down Apache arms readers with all the information they need to securely deploy applications. Administrators and programmers alike will benefit from a concise introduction to the theory of securing Apache, plus a wealth of practical advice and real-life examples.

Digital Distribution

In addition to publishing our own books, we provide digital distribution services to other publishers. The following books are currently distributed by us:


OpenSSL Cookbook 3ed now available
1 Feb 2021

The third edition of OpenSSL Cookbook is now live. The same book you know and love, now fully up to date and with comprehensive coverage of TLS 1.3.  MORE »

Second edition of Bulletproof SSL and TLS now available in preview
1 Nov 2020

We are very happy to announce the second edition of Bulletproof SSL and TLS. About half of the book has been completed and is available for purchase now.  MORE »

The Best TLS Training now in Asia-Pacific
22 Jun 2020

The Best TLS Training in the World is now available to customers in the Asia-Pacific timezones. Training over four half-days, 3.5 hours a day.  MORE »

Remote TLS Training, for public and for in-house teams
24 Mar 2020

Our TLS training will be delivered remotely in 2020, to support customers in protecting their systems from attacks even in the middle of a pandemic. We will organise public trainings in various timezones, and we are available to train entire in-house teams. Training over four half-days, 3.5 hours a day. Follow our Bulletproof TLS Newsletter or @feistyduck for up to date information.  MORE »

SSL/TLS and PKI training now available remotely
31 Jan 2019

The Best TLS Training in the World is now available as a remote option for in-house teams. Public trainings coming soon!  MORE »