Lecture 14: Networks and Firewalls
Slides
Please see slides here
Outline
LANs and Routers
- Routers sit between end devices and the Internet
- Routers process all traffic going to and from devices
- Traffic within a network is not filtered by routers
- What happens when two devices are on separate networks?
Network Segmentation
- Allows us to put a router in between multiple devices
- Routers can log traffic, restrict connections, …
- Switch VLANs let us virtually separate devices
Network Traffic
- Run
tcpdump
- Packet captures
- Intrusion Detection/Prevention Systems
- Encryption and Deep Packet Analysis
Firewalls
Recording