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Open Source Training: (gleicher Kurs auf deutsch)

DNS Security & DNSSEC

The DNS protocol, as we use it today on the Internet or in internal networks, can create various security problems: DNS data can be forged in transit, false DNS data can be injected into DNS caching servers. Since virtually all Internet protocols use DNS, this loophole in DNS can be used to exploit or bypass known security systems (such as TLS certificates or same-origin policy in JavaScript). Modern DNS servers come with a number of features to tame the DNS protocol security issues. In this course, we explain the attack vectors. And show possible solutions such as


2 days, 1,198.00 € + 19% vat = 1,425.62 €

Full eight clock hours per day, complete set of literature, WiFi, complimentary notebook, full board, drinks (selected wines are charged separately), pastries, homemade cakes, sauna, social program

Extended/reduced amenities on demand:

Surcharge per guest night in two bed rooms (spacious and comfortable rooms) 59.00 € + 7% vat = 63.13 €per night
Surcharge per guest night in the Linuxhotel-flat share 83.00 € + 7% vat = 88.81 €per night
Surcharge per guest night in single rooms (depending on availabity, early reservation recommended) 129.00 € + 7% vat = 138.03 €per night
Reduction for half board instead of full board accomodation -29.41 € + 19% vat = -35.00 €per day
Reduction w/o social program -8.40 € + 19% vat = -10.00 €per evening

Tax deductibility * Terms of cancellation


Please select your favourite reservation date


The trainer Carsten Strotmann has been working with Linux/Unix and DNS in TCP/IP networks for over 20 years. Since 2003 he is a trainer for the DNS specialists of Men & Mice and gives trainings worldwide on DNS, DNSSEC, DHCP and IPv6. He works closely with DNS software vendors (ISC BIND, NLNetLabs NSD/unbound and Microsoft DNS) and is active in the RIPE and IETF DNS working groups. The trainer Jan-Piet Mens has been working as a consultant/trainer in the Unix then Linux area since 1988. He is also in charge of the training program at the DNS specialists of Men & Mice and gives trainings worldwide. At Linuxhotel he is responsible for the Ansible config management trainings.

prerequisites for attending

Prerequisites are basics of the Unix/Linux command line (shell) and the use of a Unix/Linux editor on the text console (vi, nano, emacs, ...) as well as good knowledge of DNS name resolution (operation of "resolving" DNS servers and the delegation of the DNS namespace (this DNS knowledge is taught in the course "DNS & BIND").

If you feel uncertain on this point, we look forward to assist you via email or phone * (call +49-201 8536-600 on weekdays between 9-17 hours to reach Martin Gerwinski or Laura Trinowitz) .

Course contents

Course schedule

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