Term Paper Project: Designing a Secure
Network

This term paper involves putting together the various concepts learned
throughout this course. You are tasked with designing the most secure network
possible, keeping in mind your goal of supporting three (3) IT services: email,
file transfer (centralized), and VPN. Your first step is to design a single
network capable of supporting there three (3) different services. Once you have
fully designed your network, you will need to provide three (3) workflow
diagrams explaining how your designed network handles the three (3) different
transactions. The first is an internal user sending an email using his / her
corporate email address to a user on the Yahoo domain with an arbitrary address
of user534@yahoo.com. The second workflow diagram should show a user initiating
an FTP session from inside your network to the arbitrary site of
ftp.netneering.com. The third workflow is an externally located employee
initiating a VPN session to corporate in order to access files on the Windows
desktop computer, DT-Corp534-HellenS, at work.
Write a ten to fifteen (10-15) page paper in which you complete the
following three (3) Parts. Note: Please use the
following page breakdown to complete your assignment:
Overall
network diagram: One (1) page
Datapath
diagrams: Three (3) pages (one for each diagram)
Write-up:
six to ten (6-10) pages
Part 1
1a.  Using Microsoft
Visio or its open source alternative, create a diagram showing the overall
network you’ve designed from the user or endpoint device to the Internet cloud,
and everything in between, in which you:
Follow the access, core, distribution layer model.
Include at a minimum:

·  Authentication
server (i.e. Microsoft Active Directory)
·  Routers
·  Switches
(and / or hubs)
·  Local
users
·  Remote
users
·  Workstations
·  Files
share (i.e. CIFS)
·  Mail
server
·  Web
servers (both internal and external)
·  Firewalls
·  Internet
cloud
·  Web proxy
·  Email
proxy
·  FTP
server (for internal-to-external transport)

1b.  Explain
each network device’s function and your specific configuration of each
networking device.
1c.  Design and
label the bandwidth availability or capacity for each wired connection.
Part 2
2a.  Using Microsoft
Visio or its open source alternative, create a Datapath Diagram for the
following scenario:
Local user sends email to
a Yahoo recipient. Local (corporate) user having email address jonny.hill@Corp534.com sends an email
to user534@yahoo.com.
Document and label the diagram showing
protocols and path of the data flow as data traverses through your
network from source to destination. 

Include path lines with arrows showing
directions and layer 1, 2, 3, 4, 5, 6, and 7 (OSI) protocols that are
used for each flow. 
Show user authentication when necessary.
2b.  Using
Microsoft Visio or its open source alternative, create a Datapath Diagram for
the following scenario:
Local user, Jonny Hill,
transfers file using ftp through the Internet to another company’s site (ftp.netneering.com). He has to access the
secure shell using his active directory credentials to authenticate to the ftp
server (linux running Redhat) on the DMZ. He needs to transfer files from his
desktop across the Internet to ftp.netneering.com.
Document and label the diagram showing
protocols and path of the data flow as data traverses through your
network from source to destination. 

Include path lines with arrows showing
directions and layer 1, 2, 3, 4, 5, 6, and 7 (OSI) protocols that are
used for each flow. 
Show user authentication when necessary.
2c.  Using
Microsoft Visio or its open source alternative, create a Datapath Diagram for
the following scenario:
Remote user, Hellen
Stover, connects via VPN from home through the Internet to her corporate
desktop, DT-Corp534-HellenS. Hellen uses a browser to initiate her VPN
connection. By browsing to https://VPNaccess.corp534.com,
she arrives at a login page where she needs to authenticate using her Active
Directory credentials before the VPN tunnel is built.
 
i. 
Document and label the diagram showing protocols
and path of the data flow as data traverses through your network from source to
destination. 
 
ii. 
Include path lines with arrows showing directions
and layer 1, 2, 3, 4, 5, 6, and 7 (OSI) protocols that are used for each
flow. 
 
iii. 
Show user authentication when necessary.
2d.  Explain
how your overall design protects the organization from both inside and outside
attacks. Give examples. 
2e.  Explain
how your layered design compensates for possible device failures or breaches in
network security.
2f.  Determine
whether any possible bottlenecks exist in your design.
2g.  Explain
how to make the file transfer process more secure.
Part 3
Use
at least three (3) quality resources in this assignment. Note: Wikipedia and similar
Websites do not qualify as quality resources.




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