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7 Layers of Cybersecurity

7 Layers of Cybersecurity

7 Layers of Cybersecurity

The perimeter security layer in the 7 Layers of Cybersecurity focuses on securing the business’s network perimeter and protecting it from external threats. This involves creating a boundary between the internal network and external networks (such as the Internet), monitoring and controlling incoming and outgoing traffic, and preventing unauthorised access to the company’s network.

Attacks on Perimeter Security

  1. Port scanning: Attackers scan for open ports on network devices to identify potential vulnerabilities or entry points.
  2. Brute force attacks: Cybercriminals attempt to gain unauthorised access by systematically trying different username and password combinations.
  3. Distributed Denial of Service (DDoS) attacks: Attackers overwhelm targeted systems or networks with excessive traffic, causing disruptions.
  4. Exploiting known vulnerabilities: Attackers target known vulnerabilities in perimeter security devices, such as firewalls or routers, to gain access to the internal network.
  5. Social engineering attacks: Cybercriminals use phishing emails or other deceptive tactics to trick users into compromising perimeter security.


  1. Firewalls: Implement firewalls at the network perimeter to control incoming and outgoing traffic based on predetermined security rules.
  2. Intrusion Detection and Prevention Systems (IDPS): Deploy IDPS at the network perimeter to monitor traffic for suspicious activities and block or alert on potential threats.
  3. Regularly update and patch: Keep perimeter security devices, such as firewalls, routers, and VPNs, up-to-date with the latest security patches and firmware.
  4. Access control: Use strong authentication and authorisation mechanisms to ensure only authorized users and devices can access the internal network.
  5. Secure remote access: Implement Virtual Private Networks (VPNs) or other secure remote access solutions for employees and partners requiring internal network access.
  6. Network monitoring and logging: Continuously monitor network traffic and log activity at the network perimeter to detect and respond to potential threats.

Tools, Appliances, Devices, Products, or Solutions to Protect Perimeter Network

  1. Firewalls: Hardware or software solutions that control incoming and outgoing network traffic based on predetermined security rules.
  2. IDPS: Intrusion Detection Systems (IDS) and Intrusion Prevention Systems (IPS) monitor network traffic and alert or block suspicious activities.
  3. VPNs: Virtual Private Networks provide secure, encrypted connections between remote users and the internal network.
  4. Network security appliances: Unified Threat Management (UTM) or Next-Generation Firewalls (NGFW) combine multiple security functions, such as firewall, IDPS, and VPN, into a single appliance.
  5. Security gateways: Security gateways inspect incoming and outgoing traffic for threats, such as malware or unauthorised access attempts, and enforce security policies.
  6. Web Application Firewalls (WAF) protect web applications by monitoring and filtering HTTP traffic between the application and the Internet.
  7. Network monitoring and log management tools: These tools collect, analyze, and correlate log data from various perimeter security devices to detect and respond to security threats.

Implementing these 7 Layers of Cybersecurity and utilising appropriate tools and solutions can help companies effectively secure their network perimeter and protect against various threats.

Book a discovery call to find out how we can help protect your business.

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