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BN305 Virtual Private Networks Assignment - Secure Network Design and Implementation, Melbourne Institute of Technology, Australia

Learning Outcomes -

  • Describe architectural VPN design for small, medium and large businesses and corporations.
  • Report on the health of the existing VPN architecture, solution, data, application, and technology.
  • Discuss the appropriate security design and solutions for varieties of organisations.
  • Report on the current and future state of the management of VPN infrastructure and its technologies.
  • Interpret a roadmap process to transform the VPN architecture to support long- term organisations' goals.
  • Implement a process to support the administration and the management of VPN.

Task - Investigate, design and develop a suitable VPN network for a fictitious company in Australia (National Cyber Security Services Inc.) by addressing the following criteria -

1. Design a network for National Cyber Security Services Inc.

2. Build VPN services for the users. The network solution would be built on a simulator and include establishing VPN connections from remote sites to main branch in Brisbane.

3. You need to select the IP address of your network at main branch based on your group ID of the third subnet such as: 10.0.g.x, where g is your group ID. The other branches at Sydney and Melbourne can use the same ip or different IP but with third subnet equal to your group ID. You need to use different IP for WAN connection.

Answer - National Cyber Security Services Inc - VPN Network

Introduction

National Cyber Security Services Inc. is a fictitious company situated in Brisbane of Australia.National Cyber Security Services Inc. has planned to expand their operations in Melbourne and Sydney. The National Cyber Security Services Inc. includes three sites and construct network among the three sites using Virtual Private Network. The network also provides access for five remote users from Melbourne and three remote users from Sydney.

Virtual Private Network is the network with Private device and network in which the private device is connected to network over the encrypted mechanism. This type of connection with encrypted form provides secure connection over the network. Through this network, data sensitivity can be achieved. The network blocks unauthorized access into the network. The network can able to connect remote users into the network and the remote user can able to access the resources from the network. One of the environment they highly preferred VPN is Corporate.

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Project scope

National Cyber Security Services Inc. required corporate network for connecting three sites of their corporation such as Brisbane, Melbourne and Sydney through Virtual Private Network. The network also provides the access for five remote users from Melbourne and three remote users from Sydney. The project buildsVirtual Private Network for National Cyber Security Services Inc. for the above mentioned specifications.

Project Requirements

Network parts

  • Desktop/Pc's
  • Switches
  • Routers
  • Fibber optic cables
  • Network Interface card

VPN service parts

  • VPN software at Client side
  • Routers and Firewalls those are VPN enabled at client side
  • VPN appliance - VPN appliance is server which present at client side to process and manage the VPN traffic during connection

Logical design

The logical design of the VPN for the corporate is depicted in the following diagram

National Cyber Security Services - VPN Network Assignment.png

National Cyber Security Services Inc. head office is situated in Brisbane of Australia.National Cyber Security Services Inc. expended regional offices are located in Melbourne and Sydney. The National Cyber Security Services Inc. includes three sites and construct network among the three sites using Virtual Private Network. The network also provides access for five remote users from Melbourne and three remote users from Sydney.

Physical design

National Cyber Security Services - VPN Network Assignment1.png

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Network Topology

Network Topology represents the logical arrangement of nodes those are connected in the network. Based on the logical interconnection the data packets are transmitted over the internet[1]. To represent the logical structure of the nodes various network topologies exists in the network such as bus topology, ring topology, star topology, mesh topology, Tree topology, and Hybrid topology.

National Cyber Security Services - VPN Network Assignment2.png

The above figure illustrates the different network topologies. For the given infrastructure, full connected network topology is preferable to connect three sites as well as remote users.

IP Addressing Scheme

[2] Internet protocol addressing scheme is the method to identify the device which is connected over the internet. IP is the unique identification number; It has totally 32 bits in IPv4. Among the 32 bits divided into two sections such as Network address and individual host address. The first two parts indicates network Id, last two Parts indicates host ID. The bit 32 IP address can be represented in two methods such as illustrated in the below diagrams.

The following figure is the decimal representation of IP

National Cyber Security Services - VPN Network Assignment3.png

The following figure is the hexadecimal representation of IP

National Cyber Security Services - VPN Network Assignment4.png

Classes of IP address

IP addresses are grouped into different classes of representation such as class A, Class B, Class C, class D as well as Class E. Among the above mentioned classes Class D is used for multicasting uses. Class E is allocated for research purpose.

IP addressing Scheme

Class A

Class A can contain huge number of hosts in a single network. Among 32 bits, 8 bits allocated for network. 32 bits are assigned for host identification.

Class B

Class B has equal number of network and host representation. Among the 32 bits, 16 bits are for network identification purpose and 16 bits are for host identification purpose.

Class C

Class C IP addressing scheme consists huge number of network compare with the number of host. From 32 bits, 24 bits are for representing network and 8 bits for used for host

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Class D

Class D IP address scheme is multicasting tasks. It has 28 bits for host representation and 4 bits for network representation.

Class E

Class E is for research purpose. Like class D, It has 28 bits for host representation and 4 bits for network representation.

For the given corporate network architecture, class B is the optimal choice for networking. Class B is the optimum option. National Cyber Security Services Inc. is a fictitious company situated in Brisbane of Australia. National Cyber Security Services Inc. has planned to expand their operations in Melbourne and Sydney. The National Cyber Security Services Inc. includes three sites and construct network among the three sites using Virtual Private Network. The network also provides access for five remote users from Melbourne and three remote users from Sydney. For the above scenario, class B addressing scheme is the feasible one.

Security features and policies

VPN security policy provide the detailed list of the services those are provided by the VPN, the rights of the VPN users, how to use the VPN for getting secured communication etc [3].

There are various security measures have to be taken for the remote user to connect with the VPN such as

  • Updated Fire wall at client side
  • Updated Antivirus at client side
  • Updated security features of the operating system windows or other
  • VPN software components or VPN hardware components with fully integrated features
  • IP security

Redundancy and failover plan

Redundancy

Redundancy in network is simple and very important concept in networking. In networking the devices are interconnected. If there is no issue, the devices are working fine. Is there is may be chance to occur failure at one point will affect the entire networking task. At that, network redundancy is alternate measure to run the corporate as usual. Network redundancy is the alternate point for running the corporate networking [4].

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Failover plans

In VPN devices are connected with the encrypted communication channel. The channel is known as tunnel.

  • Firewalls are fixed at the end of the two point of tunnel
  • The interface must be installed with firewalls

VPN service deployment and Implementation

[5] The remote users can connect with the corporate network. The network is expended to the remote users. The corporate network and the remote are connected through encrypted connection. The remote users and corporate network can communicate securely through the encrypted form of connection. The employees those are physically situated outside of corporate environment can able to connect with the corporate environment more securely through encrypted form of connection. For establishing secure connection for both corporate environment and the remote users, VPN uses various strong authentication methods. The VPN can connect only the remote devices with the corporate environment, if they satisfy the security constraints. The remote devices should not compromise the security concern for the connection.

Conclusion

National Cyber Security Services Inc. is a fictitious company situated in Brisbane of Australia.National Cyber Security Services Inc. has planned to expand their operations in Melbourne and Sydney. The National Cyber Security Services Inc. includes three sites and construct network among the three sites using Virtual Private Network. The network also provides access for five remote users from Melbourne and three remote users from Sydney. The company National Cyber Security Services prefers VPN service for the interconnection of three sites such as Brisbane, Melbourne and Sydney. This project report demonstrate the VPN service parts, hoe VPN offers security services and the deployment and implementation VPN for the corporate National Cyber Security Services Inc.

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