Due Date: 02/06/2006. (5:00pm)
1. (5 marks) Solve problem 14.3 in page 430 of the text book (3rd edition).
Textbook: Cryptography and Network Security(Principal and Practices) by William Stallings 3rd edition.
2. (5 marks) Read the firewall filter information for iptables from the website ([url removed, login to view] and [url removed, login to view]) and answer the following questions in detail:
(use diagram if necessary and give detailed comments for each function you claim)
(i) You have a linux box with two ethernets cards and one is connecting to the DHCP server of Bigpond and the other is connecting a client behind the linux box. How can you configure these two network cards properly to make sure the client can use a private IP address to connect to the internet?
(ii) How can you establish a policy using iptables to make sure that only packets from [url removed, login to view] ([url removed, login to view] be given later0) are allowed to pass through the linux box to the private client?