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1.5.3.6 Packet Tracer - Communicating In A Cyber World

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© 2016 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public. Page 1 of 4
Packet Tracer – Communicating in a Cyber World
Addressing Table
Device
Private IP
Address
Public IP
Address Subnet Mask Site
FTP/Web Server 10.44.1.254 209.165.201.3 255.255.255.0 Metropolis Bank HQ
Email/DNS Server 10.44.1.253 209.165.201.4 255.255.255.0 Metropolis Bank HQ
NTP/AAA Server 10.44.1.252 209.165.201.5 255.255.255.0 Metropolis Bank HQ
File Backup Server 10.44.2.254 N/A 255.255.255.0
Gotham Healthcare
Branch
Objectives
Part 1: Send Email between Users
Part 2: Upload and Download Files using FTP
Part 3: Remotely Access an Enterprise Router using Telnet
Part 4: Remotely Access an Enterprise Router using SSH
Background
In this activity, you will communicate across remote networks using common network services. The IP
addressing, network configuration, and service configurations are already complete. You will use the client
devices in the differing geographic regions to connect to both servers and other client devices.
Part 1: Send Email between Users
Step 1: Access the email client on Mike’s PC.
a. Click the Gotham Healthcare Branch site and then click the PC Mike.
b. Click the Desktop tab and then click Email.
Step 2: Send an email to Sally.
a. Create an email by clicking the Compose button.
b. In the To: field, enter the email sally@cisco.corp
In the Subject: field, enter the string of text “Urgent- Call me”.
In the Message section, enter. “Call me when you are free today to discuss the new sale.”
c. Click the Send button to transmit the email.
What protocol was used to send the email to the email server?
Step 3: Have Sally check her email.
a. Enter the Metropolis Bank HQ site and then click the PC Sally.
Packet Tracer – Communicating in a Cyber World
© 2016 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public. Page 2 of 4
b. Click the Desktop tab and then click Email.
c. Click the Receive button to retrieve the email sent from Mike.
What protocol was used to retrieve the email from the email server?
Part 2: Upload Files using FTP
Step 1: Set the packet sniffer to capture traffic on the correct port.
a. Enter the geographic (root) view to see all three remote sites.
b. Click the Cyber Criminals Sniffer.
c. Click Port1 to capture packets on this port.
d. Leave the Cyber Criminal Sniffer open and visible for the rest of this part.
Step 2: Remotely connect to the FTP server.
e. Enter the Healthcare at Home site and then click the PC Mary.
f. Click the Desktop tab and then click Command Prompt.
g. Connect to the FTP/Web server at Metropolis Bank HQ by entering ftp 209.165.201.3 in the command
prompt.
h. Enter the username of mary and a password of cisco123.
Step 3: Upload a file to the FTP server.
a. At the ftp> prompt, enter the command dir to view the current files stored on the remote FTP server.
b. Mary has a file containing sensitive information regarding new healthcare client information.
Upload the newclients.txt file to the FTP server by entering the command put newclients.txt.
c. At the ftp> prompt, enter the command dir and verify the newclients.txt file is now on the FTP server.
Why is FTP considered an insecure protocol for moving files?
Step 4: Analyze the FTP traffic.
a. Enter the geographic (root) view to see all three remote sites.
b. Click the Cyber Criminals Sniffer.
c. Under the GUI tab on the left, click the 1
st
FTP packet available to select it. Then scroll down to the
bottom of the window displayed on the right.
What information is displayed in clear text from the FTP header?
d. On the left, click the 2
nd
FTP packet available to select it. Then scroll down to the bottom of the window
displayed on the right. Do this again for the 3
rd
FTP packet.
e. Besides the username, what other sensitive information is displayed in clear text from the FTP header?
Packet Tracer – Communicating in a Cyber World
© 2016 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public. Page 3 of 4
Part 3: Remotely Access an Enterprise Router Using Telnet
Step 1: Remotely connect to an enterprise router.
a. Enter the Healthcare at Home site and then click on the PC Dave.
b. Click the Desktop tab and then click Command Prompt.
c. Ping the enterprise router using the command ping 209.165.201.2 to verify reachability.
d. Use the command telnet 209.165.201.2 to telnet to the IP address of the enterprise router.
e. Authenticate to the enterprise router with the username of admin and the password of cisco123.
f. Use the command show users to view the active Telnet connection to the enterprise router.
Why is Telnet considered an insecure protocol for remotely managing a device?
Part 4: Remotely Access an Enterprise Router Using SSH
Step 1: Remotely connect to an enterprise router.
a. Enter the Gotham Healthcare Branch site and then click the PC Tim.
b. Click the Desktop tab and then click Command Prompt.
c. Ping the enterprise router using the command ping 209.165.201.2 to verify reachability.
d. Use the command ssh -l admin 209.165.201.2 to SSH to the IP address of the enterprise router.
e. Authenticate to the enterprise router with the password of cisco123.
f. Use the command show users to view the active SSH connection to the enterprise router.
Why is SSH considered a secure protocol for remotely managing a device?
g. Enter the global configuration mode using configure terminal command.
h. Create an enable secret password of cisco with the command enable secret cisco.
Packet Tracer – Communicating in a Cyber World
© 2016 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public. Page 4 of 4
Suggested Scoring Rubric
Activity Section
Question
Location
Possible
Points
Earned
Points
Part 1: Send email between
users
Step 2 2
Step 3 2
Part 2: Upload and
download files using FTP
Step 2 2
Step 3d 2
Step 3f 2
Part 3: Remotely access an
enterprise router using
telnet Step 1 2
Part 4: Remotely access an
enterprise router using SSH Step 1 2
Questions 14
Packet Tracer Score 86
Total Score 100
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Completed 9 July 2020

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