mahmood alhlffee project viva

FACULTY OF APPLIED SCIENCES

DEPARTMENT OF COMPUTING, ENGINEERING AND TECHNOLOGY

MSc Telecommunication Engineering

By: Mahmood Al-Hlffee

Supervisor: Dr. Chris Bowerman

Project Title

Deploying security VOIP solution with high availability across Wireless LAN topology

Sponsor Name: Mr . Stephen Swales

Index Project Introduction

List Of The Project Objectives

Client Requirements

Project Executive Summary

Critical Research Summary

Project Methodology

Project Practical Outcome

Project Evaluation Against the Objectives

Client Feedback

Project Control and Management issues

Project Introduction

This project is concerns of design and building of WLAN to providing services comparable to those provided to wired-line

network. However, the majority of the most wireless network issues are caused by human error, hardware, software,

environment or a combination of these aspects. This project research area is focused on the issues that existing in the

network subscribers: availability of the network resources by provided custom and redundant hardware to insure

availability operates continuously without failure for long time, securing the transmission signal over the air medium and

identify the different attack types that existing in network subscribers and provide Authentication, Authorization and

Accounting as strong encryption method used to verified clients login details to provide good secure communication

channel environment and allowing organization to maintain user’s database and the capacity of the network design to

handle voice traffic which created poor quality service network and packet loss. Therefore, load balancing use to

minimizing the traffic load by implement more APs with the network design to reduce the lost packets and network

injection.

List Of The Project Objectives

It will research and critically review the existing literatures that is related to wireless LAN particularly

and securing a wireless LAN network.

It will analyse and clarify client’s requirements to develop and design the approved high Availability

network link, reliability and security in WLAN network.

It will provide a VOIP solution that is based on research findings.

Evaluate and test WLAN network design.

Provide evaluate and test the security in WLAN.

The entire project will critically evaluate

A dissertation will be provided

Client requirements

1- Provide high availability connectivity in case of a faulty link or network issue.

2- Provide good wireless LAN security links such as authentication and authorization functions for the users by verified login

information.

3- A voice over IP solution capable of running over the wireless network within reliability properties with respect to the delivery

of data to the intended recipient or user end.

Project Executive Summary

As increase of the size and complexity of today’s WLAN (wireless Local Area Network), new techniques must be developed to

effectively the network design to create a system that operates continuously and provide resource availability for their clients.

However, the majority of the WLAN issues are related to human error, hardware, software or combination of these aspects. This

impact of network performance and created poor quality service and packet lost which is effect the organization business. The aim of

the project is to cover the issues by providing suitable solution techniques that can be implement and test to fit with client need.

Issues Executive Summary of the Project

1- Client would like to have good security technique that can be applied in to WLAN to minimize the risk of attacks.

2- Availability of network connection in case of fault link and network issue.

3- Availability of Cisco equipment that support the network prototype.

4- Design a network according to client's requirement.

5- Build a network prototype.


In today's world technologies, there are more enterprises that are focusing on the value of wireless local area network (WLAN)

technology instead of wired-line network because of the mobility. Mobility has increased the business profitability through

improved productivity and enhanced the link of real-time communication. However , the wireless network has arise several issues

and poorly understood regarding to the dynamic environment, mobility of subscribe, maintaining of the frequency range are the

high challenging that facing the wireless network.


According to the client subscriber of existing WLAN

1- Availability of the resources transmitting based on radio frequency or light wave over the air medium using an access point

2- Secure of the transmission data over the air medium

3- Reliability of the WLAN design to handle voice traffic

4- Extended the network mobility within different floors in same building

Critical Research Summary of the Project Outcome

The majority of curried out a successfully project is the outcome of solving the issues and hence this project has focused on the WLAN

design infrastructure issue and weakness that existing in the organization subscriber. Therefore, this project has provided design

solution to the network infrastructure by choosing the suitable techniques and enabling to transmitting network packets with

availability and high security performances across Wireless LAN protocol with testing and providing VOIP instead of PSTN technique

solution as the best option to save high telephony bills and easy managing system.

Advantage Summary of WLAN

1- Low cost network system : The first reason justifying WLAN deployment is always low in cost due to wired replacement.

2- Resiliency and safe : Due to impact of link failure temporary interface, noise, fading and network jammed in a wireless network.

There are several possible solutions to avoid such issues.

3- More security: Because of the existing solution to improve security and privacy of wireless transmissions.

4- Mobility : Has provided a great advantages to the network and hence do not have to deal with cable bonds.

5- Scalability : Means to increase the number of users connected to same device

Project Methodology

Methodology is a method use to study and analysis based on the issues and weakness of the existing network of the clients'

subscribers. However, the methodology of this project has been curried-out with five processes which was proposed for doing the

particular test. The processes methodology has been designed to perform the test of the network performance against the existing

issues and evaluated the result.

Gathering

Information

Analysis and study the current

network performan

ce

Design a network

according to client's requireme

nt

Build a network

prototype

Implemented and Testing plan

Project Methodology

Design a network according to client's requirement

In any typical offices environment for deploying 802.11 wireless network in organization, is remains and poorly understood

problem and hence wireless network installers typically focus on description of different platforms and techniques for provide

high availability and deploying a good coverage for all locations in the workplace and ensure that all the APs are placed in

correct locations to provide full coverage area to users and provide network load balancing, instead of measure properties such

as quality of network service or network capacity etc. As wireless network become more popular, the flawed threats risk of the

most of those network become more apparent. A wireless network is provide many advantage but it is more difficult to secure,

since the transmission medium is air interface and open network protocol within the geographical range and based on

weakness of the existing network of the clients subscribers. To prevent these risk of attacks the system required to implement

AAA three mechanisms encryption processes methods. The main purpose of AAA is to implement a good security

communications channel environmental for users by verified login details to gain access to the network resources, and

reliability of the network design to run freely voice traffic over the air medium and provide PBX-based server mobility

communication voice service solution over wireless to save high telephony charges over Wi-Fi.

WLAN Design overview:

Project Methodology

Build a network prototype

A build of the wireless network is to implement 802.11 standards which provides different description platforms and technologies

that could be selected for the WLAN prototype. Many wireless is developed within the aim of delivering a good service with

consideration of different WLAN hardware versions, network redundancy, Wireless Media Transporting over the air, WLAN

frequency Range interface. In order to provide a good wireless network and satisfy the client requirements, we require to provide a

suitable hardware and software to enhance the existing wireless network performance. However , the hardware is quite costly

while the software based is available in free of cost (open source software applications) and usually run on a Windows XP, 7 and 8

operating system.

Project Methodology


This section of the project methodology is provided WLAN implementation and testing plan in order to achieve the client

requirements by providing screenshots of the testing steps in really life equipment’s which was provided by the client

organizations. This section is consisting of the three following stages:

1- Configure stage.

2- Implementation stage, and

3- Testing plan stage.

Project Methodology


High availability WLAN:

Project Methodology


Security WLAN:

Project Methodology


Voice over WLAN:

Project Practical Outcome

The implementation and testing plan has successfully result of curried-out the project outcome of a network design prototype

with aim to cover the client requirements for each issues has addressed in the project has been covered successfully. The

implemented of high availability wireless for WLAN technology by provided two wireless LAN controllers in order to

reducing dis-connectivity long lifetime takes by the network which was carried out successfully included the WLCs security

features , the implement of encryption method of WAP2 and CKIP to created security wireless network tunnel associated with

RADIUS server for providing AAA authentication method by verified clients login details has been successfully achieved and

the implemented of VoWLAN solution to run voice traffics over WLAN has successfully establish and use VOIP over Wi-Fi in

cost saving and easy managed system.

Project Evaluation Against the ObjectivesObjective One:

Objective one focused on gathering information and fully understand of existing wireless network design infrastructure and the

required to enhance the output of security, and improve the level of the network performance in order to achieve the client

requirements. This objective was achieved by review of the network design and suggesting by the client through face-to-face meeting

and via emails in regular contact to keeping in update within the network design infrastructure.

Objective Two:

The second objective was addressed to the client issues within the wireless network deigned in three sectors, high availability

network link, VOIP reliability and security in a WLAN. This objective was reflected in research and literature review chapter of

WLAN stating of high availability and reliability of the network link and the possibility of using different techniques to resolve

the problem and identify different security level attacks and its corresponding solution. This objective was accomplished in

address more details and understanding in this dissertation regarding to WLAN and security threats that facing the network, and

presented different technique methods in solving these issues through presenting a different detailed research paper.

Objective three:

This objective was to develop WLAN existing design to handle voice traffics over the air interface medium. This design is to

provide the capability of running voice over Wi-Fi and compare different VOIP over WLAN solutions, techniques and make an

educated choice on the right solution to reduce the high cost of calls bills for End-to-End users with comparable quality and better

features compare with traditional network (Public Switched Telephone Networks) technology, and also highlight the level of

challenge in design for implementing voice over WLAN. The VOIP design attached into wireless network infrastructure and was

explained with details in the second chapter of this dissertation.

Objective Four:

This objective was provided to present final wireless network topology design outline the test plan to evaluate the measuring

of the client wireless network solution for different set of network infrastructure deployment, system management, radio

frequency performance environment, network load balancing and security requirements. The objective was reflected in some

significant issues regarding to physical and logical designed within the wireless network in providing the above requirements

and enabling clients to gain access to the network resources without interruption while mobilizing and ensure all the end

devices are placed in correct locations.

Objective Five:

This objective outline the evaluation of the implementation and test plan of the security solution tool that used in client wireless

network and it is prepared to meet the different set of network security level deployment in order to provide the scalability and

performance requirements of a secure Wi-Fi with WLAN infrastructure. This objective was realized in the design and implementation

chapters of this project and was tested by verifying login details in using central controller contain processor centralized server

(Authentication, Authorization and Accounting) to share key authentication between the access point and personal device over the air

interface medium. Screenshots were presented as evidence to confirm the process as well as client feedback.

Objective Six:

This objective is to provide a critical evaluation plan and approach of the entire dissertation. This was accomplished by

providing some supporting materials and solution tools in dissertation chapters used to gather information in the evaluation

plan as it progress to finish. Explained the various and major aspects results, including impacts of each selection method used

in WLAN design, effectiveness and strengths and weaknesses in WLAN security in this project, highlight the value of the

project achievements and focused on the problem that addressed in this project and presented a possible solution that

implemented to achieve client requirements.

Objective Seven:

This objective is to provide the client with real life demonstration system use of university laboratory resources equipment’s

for testing and evaluation by the client to ensure himself of the successes of the network designed prototype in order to meet

the requirements.

Practical work:

This section has provided a client scope for the network prototype of having high availability with distributing the load

balancing and capacity of route freely traffics encrypted between the different floors network and handle the voice services

over the air medium to enable traffics going through the wireless network.

Client Feedback

The client feedback was based on successes of the assessment of the project work stages which was curried-out with excellent

demonstration and test plan for achieved the project goals. Each of the client requirements were covered and proved in

demonstration with identifying the main objectives of the successes for this project and satisfaction the client need.

Project Control and Management issues The different activities were all identified and conspire versus the estimated time (Hours) that are needed for the

accomplishment of the project tasks, also highlight the start time & end time dates for each task implicated in this project. The

schedule table was updated on regularly on each task and this method strategy has good assisted in monitoring the progression

of the entire project. This provided me an idea to work for arranging every task when am behind or ahead of the schedule

tasks. Furthermore, identified the critical project risk that can highly affect the success of this project before its start and the

alleviation and prospect that take all precaution for each risk and problems that facing each task in the project. However, most

of the activities were finished as expected and planned which is making the schedule to be correspondingly updating.

Thanks!!

mahmood alhlffee project viva

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