courses take place here
Open Source Training: (gleicher Kurs auf deutsch)

The BSD PF firewall

secure networking with PF firewall

The PF firewall is one of the most powerfull open-source firewall systems. PF is part of OpenBSD, NetBSD and FreeBSD (incl. kGNU/FreeBSD via Debian) and since version 10.7 'Lion' also part of MacOS X.

This training give an introduction into building firewall systems using the 'pf' firewall system. Included in the training are advanced topics such as redunant firewall-cluster and load-balancing.

The training covers the use of the pf-firewall in IPv4 and IPv6 networks.


2 days, 997.00 € + 19% vat = 1,186.43 €

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 more than 15 years experience in working with Linux/Unix and DNS in TCP/IP networks. Carsten Strotmann designs, implements and operates firewall systems using commercial- and open-source software since 1997.

prerequisites for attending

This training is designed for system administrators with experience and knowledge on Unix/Linux/BSD-Unix system administration and IP networking (IPv4 or IPv6).

Almost all topics listed below will be covered in hands-on exercises during the training. Every attendee can follow on his/her own laptop or can use the laptops provided. Please be aware that experience with Unix/Linux is required to follow along with some of the advanced exercises.

The required network knowledge can be learned in the

The system administration knowledge can be gained from


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

the history of the pf firewall

firewall overview

use-cases for firewall systems

the pf-firewall on different operating systems

pf-firewall basics

IPv4 filter

IPv6 filter

dynamic rulesets

load-balancing and quality of service

PF-firewall high availability

transparent proxy

PF-Firewall monitoring

PF-Firewall tricks

Course schedule

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