Homework 4 Network Management Security

• Overview
• Turn In

Overview

1. Establishing physical connections.
2. Installing and configuration of networking protocols.
3. Installing and configuration of networking applications.
4. Installing and configuration of proxies and firewalls.

Equipment/Supplies/Time

• Macs located in LF-115.
• About 2 hours.

Instructions

• Security Evaluation
  • Probe OS for potential weaknesses.
    • telnet or ssh use - Command is: ssh <IP> <port>
      • Open a command prompt and telnet <IP> <port>
    • telnet port probe - Using telnet determine whether the following service protocols can be accessed over the Internet:
      1. telnet - port 23
      2. SMTP - port 25
      3. HTTP - port 80. Make sure the Web server is running by browsing the site. You may need to enter (at the prompt):
         • service http restart
      4. FTP - port 21
    • Probe ports
      • To probe for potential security problems of  a host go to grc.com for Shields UP!
    • Run Test My Shields. Print the results and set aside.
    • Run Port Probe. Print the results and set aside.
• Question 1. Analyze the results of the above tests on the Mac. Go to a Windows machine in LF-111 and run the same tests. Which machine is better protected and why?
• Question 2 - Run one of the receivers of a protocol written for Homework 2, perhaps receiver1. With the receiver running, start the grc.com tests on the computer running the receiver program.
  • What were the results?
  • What can you conclude about the completeness of these tests?
  • Since the protocols use datagrams (i.e. UDP) rather than connections (i.e. TCP), what can you say about sockets opened for datagrams being more secure than TCP-type connections?

Turn In

1. Cover Page - Your name, date, and Homework 4. Staple all pages together.
2. Answers to questions and supporting printouts.