2. Packet Filtering 2.1 The notion of chains 2.2 Filtering possibilities 2.3 Connexion tracing 2.4 Technical tests 2.5 Drawbacks 2.6 Other filtering possibilities
3. Address translation 3.1 Concerned chains 3.2 Source address translation 3.3 Destination address translation 3.4 Behaviour
4. Conclusion
5. References
6. Documentation