Abhinav Pandrate / Security case study
Network design
A /25 split into four /27 subnets with central DHCP and DNS, a wireless IoT smart home and an email server.
Role: Coursework, Kingston University CI5250 (in progress)
Year: 2026
Problem
Design and build a small multi-subnet network in Cisco Packet Tracer, from a fixed address block.
What I built
- Split a /25 into four /27 subnets (fixed-length) with one router
- Central DHCP and DNS servers with relay on each interface
- A wireless IoT smart home with temperature rules
- An email server with two clients
Stack
Cisco Packet Tracer, IPv4 subnetting, DHCP, DNS, SMTP/POP3, IoT
More work
- Network design: Multi-subnet network designed and built in Cisco Packet Tracer
- Phishing simulation: A Gophish campaign in a lab, from landing page to tracking
- Checkout race condition: A time-of-check/time-of-use issue in a Shopify checkout flow
- Wargames & labs: OverTheWire, TryHackMe and PortSwigger Web Security Academy
- Charlie Oven store: Running the Shopify store for a British outdoor oven maker
- Charlie Oven HQ: Internal operations panel for orders, shipping and factory paperwork
- 3D kitchen configurator: Plan an outdoor kitchen in 3D, then buy it on Shopify
- Stockist: B2B wholesale app for Shopify
- STYRKR CEL50 promo: A Shopify Function in place of native discounts
- STYRKR ERP & automation: NetSuite through Celigo, plus n8n for staff on- and offboarding