I offer project- or time-based Linux, Security and Open Source engineering and consulting.

My expertise includes

• UNIX/Linux systems (Debian, Ubuntu, SLES, RHEL, OpenBSD)
• Large scale system and network design
• System and network management, automatisation (Red Hat Satellite, Foreman, Puppet, ..)
• System and network security/hardening
• Firewall engineering and management
• Intrusion detection and prevention (Suricata, Snort, Passivedns, ..)
• High- and low-interaction honeypots
• Disk- and memory-forensic
• Large scale system logging and monitoring (Splunk, Logstash)
• Web- and mailhosting environments (Apache 2.4, Nginx, Postfix, Dovecot)
• High availability, redundancy and load sharing
• Proxy- and Reverse-Proxy Systems (Apache, squid, Bluecoat, ..)
• Database engines (mysql, mariadb, postgreSQL)
• Server virtualisation and containerisation (RHEV, KVM, Atomic Host, Docker)
• NAC – Network Access Control for LAN and WLAN (PacketFence)