Firewall section - Fasttrack - Presentation (full) - OSI/network protocol - iptables - filter rules - examples - adminstration tools - validation VPN section - Fasttrack (done) - Presentation (full) - How VPNs work (done) - Protokol and Authentication Overview (done) - foreach(Protocol) - Authentication - Products (done) - Pros and Cons - examples - Use case dependant solutions - Central VPN Server (done) - Distributed VPN Server (done) - Company-wide infrastructure - dynamic VPNs - Cross-Company boundaries Integrity section - What System Integrity means - Base concepts - Boot process integrity - Kernel integrity - Filesystem integrity - Packet signing - How to deal with corrupt systems ...