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Case Study 1 Bank (Golden Bank)

Question

Answered

1. Submission of Project Plan to submit the following project artefacts as the part of this submission: •a project charter outlining project scope, objectives and constraints, statement of work, project team members •a RACI Matrix showing the roles and responsibilities of each team member • a Project Plan that shows work breakdown structure (WBS) using GANTT chart; and, •project risks and proposed mitigation plan 2. •DRAFT Network security plan 3. Progress Report of 500 words. I will upload the template file so that u can work according to thatThe Golden Bank (GB) is the largest financial institution operating in mainland Tivoli. GB has 28

branch offices around Tivoli and two remote branch offices in the islands of Greenland and Faroe.

GB has three major facilities, all located in mainland Tivoli: Headquarters, Operations and Backup.

The Headquarters facility is located in a downtown office that houses the administrative staff. The

Operations facility is located in a warehouse near an industrial area in the outskirts of Tivoli. The

Operations building located 60Kms from the headquarters houses the back-office technical

functions, the data centre and the GB IT staff. Finally, the Backup facility, located in the country area

of Tivoli about 100km from the headquarters is used as a warm-site facility which can take over

within minutes in the event that the Operations facility fails.

The 28 branch offices are very similar in size and staff, spread around Tivoli in small buildings that

use relatively old and complex technology. Automated Teller Machines (ATM) at each branch use

different SNA (Systems Network Architecture) protocols to talk to the mainframe computer at

Operations. Currently, File servers still require IPX/SPX communication and some branches (not all)

use TCP/IP to connect to the Internet.

Additionally, each branch is connected to the Operations through a Cisco 2600 series Multiservice

Platform router for flexible LAN and WAN configurations and easy upgrading, also capable of

handling the many protocols used at the internet and transport layers in branch office

communications.

Apart from internal connections supporting the day-to-day activities of the organisation, GB also

deals with a dozen (12) outside support vendors including credit card processing, credit card

authorisation etc., all in a different way. The lack of standards is a major issue in Tivoli.

WANs in GB

Figure 1 outlines the complex group of WANs Tivoli currently uses to support its operations.

A mesh of three T3 leased lines connects the Headquarters, Operations and Backup buildings. These

lines operate at 44.7 Mbps, providing redundancy between the major facilities.

Branches connect to the major facilities most of the times via Frame Relay links. For each branch,

there are two 56kbps PVCs. One leads to the Operations and the other leads to the Backup facility.

There are ISDN backup lines in case of Frame Relay failure. The two islands are connected to the

Headquarters via 128kbps fractional T1 digital leased lines. By the same token, the 12 vendors are

connected to the GB via a frame relay network of 56kbps each. As shown in the diagram, GB uses

two separate ISPs for Internet connection via T1 leased linesLANs in GB

Each branch office (including the two islands) is supported by 10Base-T Ethernet LANs, GB is

expecting to change for more modern Ethernets. Each branch has an average of 20 employees

including the bank tellers, customer service and branch managers. The Headquarters houses 80

administrative, finance, accounting and management staff, supported by 100BaseT Ethernet LANs. In

the Operations facility, there are 20 engineers in charge of the technical support of the data centre,

networking, and maintenance and application development. The organisational and operational

structure of the Backup facility is very similar to Operations.

Current ICT infrastructure

Branch (including the islands)

Hardware

ï‚· Staff equipped with Desktop PCs running Windows 8

ï‚· Two ATM machines

ï‚· 2 networked Laser Printers

ï‚· 2 network flat-bed scanners

ï‚· 1 NAS for local storage

ï‚· Cisco 2600 series Multiservice Platform routers

ï‚· 10BaseT Ethernet ( 2 subnets: administrative + management)

3

Networks and Information Security Case study

Copyright © Edilson Arenas

CQUniversity

Software

ï‚· Microsoft outlook installed in all staff workstations to access emails

ï‚· Accounting, finance software and Microsoft Office suite

ï‚· Anti-virus and software firewalls

Headquarters

Hardware

ï‚· Ten ATM Machines

ï‚· Staff equipped with Desktop PCs running Windows 8

ï‚· 10 networked Laser Printers

ï‚· 10 network flat-bed scanners

ï‚· Cisco 2600 series Multiservice Platform routers

ï‚· 100BaseT Ethernet (4 subnets: Finance + Accounting + Management + Administrative)

Software

ï‚· Microsoft outlook installed in all staff workstations to access emails

ï‚· Specialised software including Accounting, Finance, Decision Support, Executive and

management) and Microsoft Office suite.

ï‚· Anti-virus and software firewalls

Operations

ï‚· Cisco 2600 series Multiservice Platform routers

ï‚· Operating system: Combination of Windows and Linux for servers

ï‚· Staff equipped with Desktop PCs running Windows 8

All operational servers including FTP, HTTP/HTTPS, SMTP/SMTPS, DHCP, DNS, Authentication,

Telepresence, Domain Controllers, Database, SAN, Load Balancing and video are concentrated in this

facility.

Backup

As mentioned, the Backup is a warm-site facility which can take over within minutes in the event

that the Operations facility fails. Its infrastructure mirrors Operations’

Problem Statement

GB business processes rely on a combination of systems including Internet, IPX/SPX, SNA and ICT

related services with a very complex ICT infrastructure in place seen by the GB board of directors as

problematic for the sustainability and further GB business growth. They argue that the organisation

is spending a great deal of money in the maintenance and integration of disparate and cumbersome

systems; and with little room to expand and improve its services. The GB board of directors claim

that there needs to be a change and re-provisioning of its ICT infrastructure to remain competitive.

As part of this change, the transition to interoperability should be achieved in a smooth manner and

leverage in the latest advancements in secure network infrastructure to guarantee “zero” problems

within the GB business processes. The bank is expected to expand its branch services to 30% in the 

4

Networks and Information Security Case study

Copyright © Edilson Arenas

CQUniversity

next 3 years. They are also considering embracing the latest Cisco immersive telepresence system

across the organisation, staff remote access and mobile services (staff BYOD and Work-at-home (WAT)

policies) that GB bank currently does not have.

In terms of security, the new system should safeguard the appropriate access and use of ICT

resources; ensure unauthorised and malicious internal and external network attacks are properly

blocked. Network redundancy is currently achieved with the mesh of three T3 leased lines

connecting the Headquarters, Operations and Backup buildings; however, nothing has been done so

far in terms a security plan including a robust disaster recovery and business continuity plan.

Statement of Work

Your task is to design and implement a secured network infrastructure that ensures high availability,

reliability, scalability, performance and security to support GB services. This requires 1) the design of

the network; 2) the delivery of a comprehensive network security plan; and 3) Security technology

implementation - proof of concept.

The following is a description of what is required.

Network Design

1. Network design including LANs, VLANs, WANs and VPNs. In this design, the IP address

allocation should use the CIDR format (x.y.z.t/n). Each group should have different ranges of

IP public and private addresses. Discuss with your mentor the range of addresses you are

planning to use.

2. Each LAN, WAN, VLAN and VPN should be justified in terms of traffic, reliability,

performance, availability, scalability and security. To do this you need to make a number of

assumptions (discuss this with your mentor / facilitator / teacher); however, assume that

ATM machines, Operations and Backup facilities are to operate 24/7. Other facilities are to

operate from 6:00am to 8:00pm daily.

For this design, take into account the following:

a. Traffic generated by the hosts: ATMs, clients, servers and backup devices

b. Appropriateness of current WAN links

c. Appropriateness of current WANs (Frame Relay)

d. Appropriateness of current LANs

e. VLANs requirements

f. All networking devices including routers and switches at each site or location

g. IP address allocation of each network and main network devices

h. Sub-netting to separate traffic including IP address allocation

i. Firewalls positioning and strategy: Dual firewall, Single firewall, stateful packet filter,

j. Proxies

k. NAT/PAT

l. DMZs

m. Routing tables for all routers

n. Firewalls Access Control Lists

5

Networks and Information Security Case study

Copyright © Edilson Arenas

CQUniversity

o. Diagram of the network topology and allocation of devices; and IP addresses for the main

network devices

Network Security plan

The network security plan should contain as minimum the following:

1. Introduction outlining the importance of the plan and its purpose

2. Scope outlining the areas of the organisation that the Plan applies

3. Assumptions documenting any assumptions you have made in order to prepare the plan

4. Clear and concise statements about what the Security Plan is designed to achieve.

5. Summary and analysis of the organisation’s risks, highlighting the current threats,

challenges and vulnerabilities along with an assessment of current security environment

and treatments in place.

6. Security policies to address all possible network attacks and vulnerabilities

7. Disaster recovery and Business continuity plans

8. Security Strategies and Recommended controls including security policies

9. Residual risks that remain after all possible (cost-effective) mitigation or treatment of risks.

Your security plan should estimate, describe and rate these risks to guide the priorities for

ongoing monitoring of risks.

10. Resources and cost requirements for implementing the recommendation

Security Technology Implementation

As part of the security technology implementation and in line with the recommended controls

mentioned above in item 8, you need to provide at least the complete design of the following:

1. Data backup and recovery procedures. Note that there are NASs at the branches to back

up the data generated locally, however the vast majority of data is backed up to the File

Server Operations facility through the network.

2. Secure staff remote access and mobile services (staff BYOD and Work-at-home (WAT))

3. A proper authentication system that takes care of highly secured roles and permissions

to access, share, download, upload files and folders.

4. Proper safeguard required to prevent spam emails

5. Hardening of application servers including FTP, HTTP/HTTPS, SMTP/SMTPS, DHCP, DNS,

Authentication, Telepresence, Domain Controllers, Database, SAN, Load Balancing, video

and any other specialised banking software.

6. Network security including DMZs, firewalls, Proxies, IDSs, IPS, Cryptography etc.

7. Security Policies

GB Technology implementation - Proof of concept

As part of the project requirements, you will need to design; implement and test the Unified Threat

Management system (Enterprise Firewall) using open software like Endian FW, Vyatta or any other

system you are familiar with. The solution should address the firewall needs of GB, including the

installation of the software, configuration of the ACLs, and developing of test cases to check the

complete functionality of the rules. 

6

Networks and Information Security Case study

Copyright © Edilson Arenas

CQUniversity

For the proof of concept, it is mandatory that you include the documented results (procedures and

screen dumps) of various network security attacks tests (such as Network Penetration Test) as part

of your final project report. You may use your choice of security software/tools and operating

systems (Windows, Linux, or Ubuntu) in a virtualized environment to build and simulate the security

tests. To do this students are suggested to get a second-hand personal computer and give a physical

demonstration at the end of the term.

Final Remark

It is important to note that the final output of your project is to deliver a comprehensive report

documentation comprising network design, network security plan and security technology

implementation

Case Study 1 Bank (Golden Bank)

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