HI, I’M NIRATHAN
Computer Science undergraduate at APU. Dedicated to defensive architecture, practical threat detection, and system hardening.
I'm a Computer Science undergraduate specializing in Cybersecurity at Asia Pacific University (APU). My focus lives at the intersection of defensive architecture, network traffic inspection, and threat detection. Rather than treating security as an afterthought, I like dissecting how systems behave under stress and engineering controls that prevent compromise.
From hands-on SOC alert triage with Tecforte to configuring segmented enterprise networks and competing in CTFs, I bring a practical problem-solving mindset. I combine clear technical communication with a steady, detail-oriented work ethic—ready to contribute to a security operations or engineering team.
[02] cat experience.log
Hands-on security training, network design, and application development.
PROFESSIONAL EXPERIENCE · JUL-DEC 2025
Tecforte / MSSGard at APU
Monitored and analysed network traffic across APU's infrastructure while developing practical incident-response and threat-detection skills.
Interactive Malay language learning platform developed with ASP.NET and C#. Built with parameterized queries, input validation, and secure session handling.
Designed a multi-site enterprise network spanning three branches and local LAN. Configured inter-VLAN routing, OSPF, and granular ACL security boundaries.
MS Maintenance Services · Colombo
Coordinated workers and suppliers, oversaw on-site activity, and supported efficient, safe project execution.
2021-2022[03] ls ./security-lab
Challenges, labs and tools: what I did, and what I found or learned.
Configured Suricata IDS rules and ingested multi-source event telemetry into MSSGard/ELITE SIEM. Simulated malicious port scanning, SSH brute force, and command injection attacks to benchmark alert response times.
Mastered log correlation across network and host layers, learning how to write custom suppression rules to eliminate false positives without blunting detection sensitivity.
Competed in collegiate CTF challenge solving offensive security challenges across web exploitation (JWT token manipulation, broken object level authorization) and Linux privilege escalation.
Gained deep empathy for the attacker mindset: understanding exploit chains is the most reliable way to design foolproof defensive architecture.
Architected an isolated enterprise lab with strict inter-VLAN access control lists (ACLs), DHCP snooping, and 802.1X port authentication on Cisco switching fabric.
Prevented lateral movement across subnets and mitigated rogue DHCP/ARP spoofing attacks directly at the access layer.
[04] ls ./tech-stack
Built through university projects, labs, workshops, and practical security training.
Cyber Security · Asia Pacific University of Technology & Innovation
Computing & Technology Route · Asia Pacific University
English · Tamil · Sinhala · Bahasa Melayu
[06] cat security-policy.md
RFC 9116 security policy, coordinated vulnerability disclosure, and community acknowledgments.
I take defense and application integrity seriously. If you have discovered a security issue, vulnerability, or misconfiguration on this domain, thank you for practicing coordinated disclosure.
nirathan-portfolio.nirathan.workers.dev.Recognizing educators, mentors, and ethical researchers who contribute to defensive security research, peer review, and responsible disclosure.
For mentorship in live SIEM operations, traffic telemetry, and threat correlation.
For foundational training in enterprise networks, Linux systems, and defensive security.
Researchers who report vulnerabilities responsibly will be permanently credited here.