Nabin
Tiwari
Computer Science student with a sharp focus on network infrastructure and cybersecurity — building secure, resilient systems through hands-on labs, Cisco training, and real-world ISP experience.
Building secure networks,
one packet at a time
I learn networks and security the same way I'd learn a language — by using them until they break, then figuring out why.
I'm a Computer Science student specializing in Network Technology & Cybersecurity, currently completing a technical support internship at an ISP, where I troubleshoot Layer 1–3 connectivity issues for real customers using OSI-model diagnostics.
Outside of work, I build what I want to understand better. I've deployed and hardened a Windows Server 2022 Active Directory environment from scratch (DHCP, GPOs, OU-based access control), and designed a segmented enterprise network lab — Core/Distribution/Access layers, VLANs, ACLs — protected by a custom-tuned Snort IDS and UFW firewall. To test whether any of it actually holds up, I ran a full five-phase penetration test against my own lab: reconnaissance and enumeration with Nmap and enum4linux, vulnerability validation with Nessus and OpenVAS, exploitation with Metasploit, and web application testing with Burp Suite and SQLMap — then wrote it up as a formal report with CVSS-prioritized findings and remediation steps.
Tools I work with regularly: Wireshark, Nmap, Burp Suite, Metasploit, Snort, SQLMap, Nessus, OpenVAS, Linux, and Windows Server/Active Directory.
I'm also building Security Playground, a full-stack cybersecurity learning platform — live, interactive SQL Injection and XSS labs with a backend-verified CTF flag system, built the way I learn best: by doing, not just reading.
I'm looking for SOC Analyst, Network Security, or Penetration Testing internships — remote or on-site. If your team needs someone who documents thoroughly and actually enjoys the reconnaissance phase, let's talk.
Tools of the trade
A focused, hands-on skill set built through certifications, virtual labs, and real-world ISP troubleshooting.
Where theory meets real traffic
- Applied OSI model-based troubleshooting to isolate and resolve Layer 1–3 network connectivity issues for live ISP customers.
- Assisted in configuring and maintaining routers and network devices to sustain stable internet connectivity across the service area.
- Monitored network performance using diagnostic tools to proactively detect faults and service disruptions before they escalated.
- Collaborated with engineering teams to support ISP operations and ensure timely resolution of customer-reported network issues.
Built in the lab, proven in the packet
Hands-on virtual environments where every concept gets tested, broken, and fixed.
A full-stack cybersecurity learning platform offering interactive web security labs and CTF challenges with backend-verified flag validation. Includes real vulnerable web apps for SQL Injection and XSS practice, a flag system that blocks source-code cheating by storing and checking flags server-side, and session-based progress tracking with an XP system. Built and deployed using an AI-assisted development workflow, pairing security knowledge with modern tooling to ship a working platform quickly.
Credentials that carry weight
Where skills get battle-tested
Real-world hacking labs, CTF challenges, and security research platforms — learning by doing, not just reading.
The foundation
Let's build something secure
Whether you're looking for a network intern, a lab partner, or just want to talk shop about Cisco, Snort, or packet analysis — I'm always up for a conversation.