Firewalls (2)
What is a firewall ?
- Hardware and software connecting 2 networks (filters, proxies)
- mediates all traffic between the nets
- protects each network from attacks originating on the other
Firewall types
- packet filters; packet analyzers
- application level proxies
- circuit level proxies (SOCKS)
- hybrid
Firewall characteristics
- simple, reliable, configurable, manageable, operable