Beyond Encryption: Key Elements for Establishing a Secure Network Infrastructure

With cyber threats lurking around every corner of the digital space, it has become paramount to prioritize the security of your network infrastructure. A secure network infrastructure serves as the backbone of any organisation, safeguarding confidential data, preventing unauthorized access, and ensuring business continuity.

Hence, to build a reliable shield against potential breaches, it is crucial to understand the key components and technologies that contribute to secure network infrastructure. From firewalls and encryption protocols to intrusion detection systems and secure remote access, these elements work together harmoniously to fortify your network’s defence against cyber-attacks.

In this blog, we discuss the importance of network infrastructure in protecting valuable data and explore the various components and technologies that organisations need to consider implementing to keep their network secure.

Network Security

Network security refers to the measures taken to protect a network and its data against unauthorized access, misuse, and other potential threats. It plays a crucial role in safeguarding the confidentiality, integrity, and availability of data for organizations and individuals alike.

The security threats faced by networks in Australia and the world include:

1. Malware attacks
2. Denial of Service (DoS) attacks
3. Phishing and Social engineering

Impact of Network Security Breaches on Organisations

For businesses, network security breaches might have major consequences like:

• Theft or destruction of confidential information, which can harm an organization’s finances and reputation.
• A disruption in corporate operations that can lower productivity.
• Failure to comply with legal and regulatory obligations, which might result in fines.
• Affected consumer loyalty and trust.

Organisations must be aware of the possible repercussions of network security breaches and take proactive steps to reduce the risks.

Key Elements for Establishing a Secure Network Infrastructure

1. Implement Layer Two Security

• Mitigate layer two attacks by configuring router operating system (OS) instructions.
• Provide layer two security and identity-based networking services (IBNS)
• Utilise the access control system (ACS) and implement the necessary identity management.

 2. Configure Router OS intrusion prevention system (OS-IPS)

• Examine the sophisticated features of the router OS-IPS firewall, paying particular attention to event action processing (EAP).
• Identify risks, configure, and validate IPS features, and dynamically block from the network.
• Maintain, tweak, and update the necessary IPS signatures.
• Set up and test network address translation (NAT) and context-based access control (CBAC) and take proactive measures to counteract identified network risks.
• Set up and test the zone-based firewall (ZFW), sophisticated application inspections, and URL filtering. 

3. Configure Virtual Private Networks (VPNs)

• Examine and assess the characteristics and capabilities of IPSec (Internet Protocol Security) and IPSec/GRE (Generic Routeing Encapsulation).
• Utilising certificate authorities, configure site-to-site VPN for safe communication.
• Analyse the characteristics and capabilities of the dynamic multipoint VPN (DMVPN) that are necessary.
• Establish secure connectivity for site-to-site VPN operations and check it.

4. Provide Secure Connectivity for site-to-site and Remote Access Communication

• To supply features and advantages for remote access connection, offer highly secure network access via a secure socket layer (SSL) VPN.
• Consider the advantages of EasyVPN and set up the server using DVTI to build a virtual access interface on the virtual tunnel interface.
• To create a site-to-site connection utilising a router and VPN software clients, configure and test EasyVPN remote.
• Use group-encrypted transport (GET) VPN capabilities to make provisioning and administration of VPNs simpler. 

5. Implement Network Foundation Protection (NFP)

• Analyse the NFP infrastructure protection characteristics, then record the results.
• Use router OS features and secure the administration plane, data plane, and control plane.
• Compare functionality to technical requirements.
• Report evaluation results and get the necessary personnel’s approval.

6. Network Security Policy:

A comprehensive network security policy lays the foundation for a secure infrastructure. It should clearly define the roles, responsibilities, and procedures necessary to maintain optimal security.

7. Firewall Implementation:

Firewalls are crucial in protecting your network from unauthorized access. They monitor incoming and outgoing traffic while enforcing rules based on your organization’s security policy. 

8. Intrusion Prevention Systems:

Intrusion prevention systems (IPS) are essential components that continuously scan for suspicious activity and block any potential threats in real time.

9. Endpoint Security:

Ensuring all devices connected to the network have up-to-date antivirus software, firewalls, and other security tools is critical in preventing attacks from reaching your core systems.

10. Encryption:

Encrypting sensitive data, both in transit and at rest, is an important safeguard against unauthorized access and breaches.

11. Regular Security Audits:

Conducting periodic security audits will help identify vulnerabilities or areas where improvement is needed, allowing you to take proactive measures to strengthen your network.

12. Access Controls:

Implementing robust access controls ensures that only authorized users can access sensitive information within your network. 

13. Employee Training and Awareness:

Equipping employees with proper cybersecurity training will help them recognize potential threats and adhere to best practices when using the company network. 

14. Secure System Design:

Developing secure systems from the ground up minimizes vulnerabilities and reduces the risk of compromise. 

15. Disaster Recovery and Incident Response Planning:

Establishing a disaster recovery plan allows for quick recovery in case of a security breach, while an incident response plan outlines how your organization will react if an attack occurs.

Role of Each Network Device in Securing Infrastructure

Each network device mentioned above performs specific functions to enhance the security of the network infrastructure:

Routers:

Routers enforce access control policies and create secure connections between networks, preventing unauthorized access.

Switches:

Switches ensure secure and reliable communication within a local network and prevent unauthorized devices from gaining access.

Firewalls:

Firewalls protect the network by filtering incoming and outgoing traffic, blocking potential threats and unauthorized access attempts.

Intrusion Detection Systems (IDS):

IDS monitors the network for abnormal behaviour and raises alerts in case of intrusion attempts or suspicious activities, allowing prompt mitigation actions.

By incorporating these critical elements into your organisation’s secure network infrastructure, your Company will be able to establish a resilient security posture for your business.