1. Reporter: Peiven Cheng Advisor: Chu-Sing Yang Date: 2011-12-15 Project 5 NAT Server Project 6 VPN Server 1 NCKU EECS ITLab

2. Introduction 作業目的 讓同學瞭解一個網路架構中的 NAT Server 以及 VPN Server 所扮演的角色並實作之。 作業需求 實作於 Testbed 上架設此兩 Server ，並於拓樸中以 Client 的角度使用此二 Server 。 作業期限 12 月 28 日前 23:59 寄至 NCKU EECS ITLab 2

3. Scenario NCKU EECS ITLab 3

4. Experiments Project 5 node1 can access the webpage on HttpServer through NAT Server. Use tcpdump to inspect the packets flow on NAT Server. Project 6 HttpServer set firewalls to allow only connections from 10.1.2.1. node2 can access the webpage on HttpServer through VPN Server. Use tcpdump to inspect the packet flow on VPN Server NCKU EECS ITLab 4

5. Requirements Show the process of your experiments.(60%) Discussion(40%) What are the differences between VPN Server and NAT Server? What are the differences of the packet flow you inspected between VPN Server and NAT Server? In what condition, network manager need to setup this two servers? (Describe each) NCKU EECS ITLab 5

6. Thank You! 6 NCKU EECS ITLab