Lecture 19 Outline

Reading: text, 26
Assignments: Homework 3, due Nov. 8 (changed); Lab 3, due Nov. 8 (changed)

  1. Firewalls
    1. Why use them?
    2. Packet-level or filtering firewalls
    3. Application layer or proxy firewalls
  2. Network organization
    1. Inside/outside
    2. Inside/DMZ/outside
    3. How email and web services (and others) are handled
  3. Denial of service attacks
    1. SYN cookies
    2. Adaptive time-out
  4. Domain Name Service
    1. Weak authentication
    2. Reverse name lookup
    3. Attacks
    4. DNSSEC
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