Applying Design Patterns in the implementation of a simple packet filter

Sammanfattning: By reading this thesis the reader will get insight into if and how Design Pattern can help in the grand scheme of software development. Practice is combined with theory in an empirical study to see if Design Patterns are a feasible method for implementing a simple packet filtering solution. The resulting application uses the Chain of Responsibility and Simpleton Design Patterns together with the Security Pattern Packet Filter Firewall. In the results the thesis will present how Design Patterns assisted in the design and successful implementation of the packet filter together with a discussion of the benefits, limitations and drawbacks of the solution. Finally the reader will take part in how further studies can be constructed upon the given result.