The Network Diagram As The One Shown Below Is A Helpful Tool In Deter
The network diagram, as the one shown below is a helpful tool in determining where to place access controls on a network. However, how would you protect the organization from an inside breach? Let say the perpetrator is a low-level employee who stole a mid-level supervisor’s username and password. The primary goal of this perpetrator is to access the server where a plethora of information about the organization’s trade secrets is stored. For this assignment you will create a network diagram indicating the organization’s network with workstations, remote clients, VPN (s) LAN switch(es) and other important office components (no more than 12) showing the security needed to avoid and identify the breach. You must also indicate the workstation the perpetrator used. In addition, you will need to write 1-2 pages explaining the reasons for the security protocols you apply. Using APA formatting you need to cite at least five credible sources to support your work. (Chapple, Ballad, Ballad, & Banks, 2014)
Paper For Above instruction
The protection of organizational networks from insider threats requires a multifaceted approach combining technical safeguards, user education, and strict access controls. To effectively prevent an internal breach—such as a low-level employee stealing login credentials to access sensitive trade secret data—a detailed network diagram must visualize security layer placements that deter and identify malicious activity. This paper discusses the network security protocols essential for safeguarding against internal threats, supporting the diagram's design with scholarly evidence.
**Network Diagram Overview**
The network diagram should encompass the organization's core components, including workstations used by employees, remote client access points, LAN switches, VPN gateways, servers holding confidential data, and security devices such as firewalls and intrusion detection systems (IDS). It should explicitly designate the workstation exploited by the perpetrator, in this case, a low-level employee, to analyze potential vulnerabilities. The diagram must illustrate security zones—perimeter defenses like firewalls and DMZs—and internal security controls such as network segmentation, strong authentication mechanisms, and monitoring tools.
**Security Protocols and Their Justification**
1. **Access Control and Authentication**
Implementing Role-Based Access Control (RBAC) is critical in restricting user permissions strictly to what is necessary for their role (Chapple et al., 2014). By assigning minimal privileges, organizations reduce the risk of insiders accessing sensitive information beyond their scope. Multi-factor authentication (MFA) adds an additional security layer, requiring users to verify their identity through multiple means, such as a password and a one-time code sent to a device. This approach minimizes the risk even if credentials are compromised (O’Gorman, 2003). Given the insider threat scenario, MFA is particularly effective in preventing unauthorized access, even with stolen usernames and passwords.
2. **Network Segmentation**
Segmenting the network into isolated zones—such as separating the administrative and employee areas—limits lateral movement of malicious actors once inside. For example, sensitive servers hosting trade secrets should reside in a secured, restricted zone accessible only through stringent controls (Denning, 1987). Virtual LANs (VLANs) further enforce segmentation within switches, restricting access to critical servers and databases. This segregation acts as a containment strategy, preventing an attacker from easily accessing multiple systems.
3. **Monitoring and Intrusion Detection**
Employing continuous network monitoring through Intrusion Detection Systems (IDS) and Security Information and Event Management (SIEM) tools enables real-time detection of suspicious activities. These tools analyze network traffic patterns and alert security personnel to anomalies such as unusual login times, access from unrecognized devices, or excessive data transfers (Scarfone & Mell, 2007). In the insider breach scenario, monitoring logs can reveal the particular workstation used to access the server during off-hours or atypical activities, facilitating swift response.
4. **Endpoint Security Measures**
Securing workstations with anti-malware tools, device encryption, and strict user policies minimizes the risk of malware or unauthorized software enabling insider threats. Endpoint Detection and Response (EDR) solutions can trace malicious activities back to specific devices and user accounts, aiding investigation and mitigation efforts (Kumar et al., 2017). Additionally, disabling USB ports and restricting external device use prevent data exfiltration.
5. **User Education and Policies**
Regular training emphasizing security policies and recognizing insider threats is vital. Employees should understand the importance of credential confidentiality and the risks of social engineering attacks. Implementing mandatory cybersecurity awareness programs enhances a security-conscious organizational culture, which acts as a deterrent to internal breaches (Pfleeger & Caputo, 2004).
**Conclusion**
Protecting against insider threats involves layered security controls meticulously integrated within the organizational network architecture. The network diagram serves as a visual guide for deploying these controls strategically. Combining strict access management, network segmentation, vigilant monitoring, endpoint security, and user education creates a resilient environment that minimizes the risk and impact of internal breaches. Ongoing assessment and updates to security protocols—aligned with emerging threats—are essential to maintaining robust defenses.
References
Chapple, M., Ballad, B., Ballad, T., & Banks, E. K. (2014).
Access control, authentication, and public key infrastructure (2nd ed.). Jones & Bartlett Learning.
Denning, D. E. (1987). *Implementing a computer security policy*. ACM SIGOPS Operating Systems Review, 21(4), 60-71.
Kumar, R., Rathore, A., & Sharma, S. (2017). Endpoint security: A comprehensive review.
International Journal of Computer Applications , 169(1), 1-7.
O’Gorman, L. (2003). Comparing passwords, tokens, and biometrics for User Authentication.
Proceedings of the IEEE , 91(12), 2021-2040.
Pfleeger, C. P., & Caputo, D. D. (2004). Leveraging security awareness: A pilot study. IEEE Security & Privacy, 2(3), 26-33.
Scarfone, K., & Mell, P. (2007). Guide to Intrusion Detection and Prevention Systems (IDPS).
NIST Special Publication 800-94 .