Leszek Miś has over 12 years of experience in IT security technology supporting the largest companies and institutions for implementation, consulting and technical training. Next to that, he has 8 years of experience in teaching and transferring a technical knowledge and experience He trainer more than 500+ persons with the average evaluation in a 1-5 scale: 4.9. He is an IT Security Architect with pentester's love and recognized expert of enterprise Open Source solutions, Provides web application and infrastructure penetration tests and specializes in Linux/OS hardening and defensive security of web application platforms He is a known and respected trainer/examiner of Red Hat products in Poland (RHCA, RHCSS, RHCE) and author of many IT Security workshops (ModSecurity, FreeIPA, SELinux, Linux Hardening). As a speaker he attended many conferences like Confidence 2016 ("Honey(pot) flavored hunt for cyber enemy), PLNOG 2016 ("Yoyo! It's us, packets! Catch us if you can"), NGSEC 2016 ("Many security layers for many defensive opportunities"), Open Source Day 2010/2011/2012/2013/2014, SysDay 2008 ("SELinux vs exploits"), Confitura 2014 ("Detection and elimination of threats in real tim