Lecture on Advanced Internet Security Firewalls: Types and Architectures Walter Kriha Roadmap Part 1: Firewall Architecture • The purpose of a firewall • IP components important for firewalls • Firewall Types • Firewall limits Part 2: Filtering Technology • IP, TCP, ICMP filtering • static filtering: ipchains • dynamic (stateful) filtering: iptables • Application level filtering: proxies • Filtering limits, WAFs Part 3: Services and Protocols • frequently needed services and