Secure and Smart Bank IoT Network System Design and Implementation

Scenario Description: Secure Smart Bank IoT Network:

Muscat Bank's network is designed to interconnect the head office, a centralized data center, and three other branch locations to ensure seamless communication and efficient operations. The head office is structured with multiple departments, each allocated to specific VLANs to maintain traffic isolation and security. Within the head office, a data center houses critical servers such as an email server, DHCP server, IoT management server, HTTP server, and FTP server.

IoT devices are prioritized for enhanced monitoring and management, reflecting the bank’s commitment to leveraging smart technologies. These servers are assigned static IP addresses for consistent connectivity and management. Each branch location is equipped with essential end devices, including PCs, printers, scanners, and **VoIP (Voice over IP) phones, supporting comprehensive communication and operational needs.

The network architecture prioritizes IoT devices by implementing advanced monitoring protocols to ensure their security and optimal performance. MPLS/Frame Relay is leveraged for efficient, secure inter-branch connectivity, and OSPF supports dynamic routing to maintain fast route convergence. To protect against cyber threats, the head office deploys a robust firewall and VPN solutions for encrypted remote access and secure communication between locations. Access control lists (ACLs) regulate traffic to safeguard IoT devices and other network resources, while switch port security prevents unauthorized device connections. Redundancy is maintained through HSRP (Hot Standby Router Protocol), which provides failover capabilities for uninterrupted service in case of primary router failure.

Dynamic IP allocation is managed by the DHCP server in the data center, ensuring efficient address distribution across all end devices. IoT devices receive prioritized network access to facilitate secure data exchange and reliable device management. VoIP phones are configured for seamless internal and inter-branch calls, while PCs are set up for full connectivity, supporting operational communication. Email services and file transfer protocols enable secure data exchange, enhancing productivity across departments. The comprehensive network design, backed by redundancy, encryption, and stringent security measures, positions Muscat Bank to operate with confidence and adaptability, fostering growth and technological integration.

Assessment Criteria:

1. VLANs for Departments and Remote Branches: Segmentation of network traffic for improved security and management.
2. Access List Control: Implementation of ACLs to regulate and secure network traffic.
3. File Transfer: Secure protocols for data exchange between departments.
4. Security Measures:
- Firewall (implemented at the head office).
- VPN for encrypted remote access.
- Password Protection on Routers for enhanced device security.
- Encryption for secure data transmission.

5. HSRP (Hot Standby Router Protocol): Ensuring redundancy for continuous service.
6. Redundancy/Backup Servers: Backup servers to take over if main servers fail.
7. OSPF (Open Shortest Path First): Dynamic routing protocol for efficient network performance.
8. IoT Device Monitoring: Continuous monitoring to ensure operational security and performance of IoT devices.

Network Topology Created
The network topology below satisfy the user requirements above and everything is verified, tested and working fine.