Break my network. Break my routes.
Interactive tools that run in your browser. Nothing is sent anywhere.
Dual-ISP failover simulator
Click any link or device to cut itA simulation of a dual-uplink design: two towers, two switches, one core router, two ISPs. Cut something and watch traffic fail over, or fail.
traceroute
noc log
This is a simulation. Costs are illustrative milliseconds, and routes recompute 0.9 s after a change, a stand-in for failure-detection timers. Packets sent into a dead link before then are lost, as on a real network.
Troubleshoot with me
two real-world incidentsPick the commands you would run, see what a real engineer would see, then give your diagnosis. Fewer, smarter commands and no risky changes make a cleaner run.
Route lookup: which route wins?
longest-prefix matchRouters send each packet using the most specific matching route. This is preloaded with the mistake from the first case study: a /8 that was far too wide.
Subnet calculator
IPv4 / CIDRLabs I am going to build.
Secure guest Wi-Fi segmentation
Design a guest network that is isolated from administrative networks but still has the internet access it needs.
Skills: VLANs, TCP/IP, ACLs, firewall policy
Firewall policy review
Review rules in a lab, find overly permissive access, restrict what is unnecessary and verify what is allowed and denied.
Skills: FortiGate concepts, NAT, logging, least privilege
Network traffic analysis with Wireshark
Analyze a public training capture for DNS failures, TCP problems and retransmissions.
Skills: Wireshark, TCP/IP, incident investigation
Linux DNS troubleshooting case study
Document a DNS failure from resolver configuration to packet capture to root cause.
Skills: dig, tcpdump, resolvers, routing
Sequential switch-management automation
A safe SSH workflow that checks reachability, collects device information and reboots approved devices one at a time, with a dry run first.
Skills: Bash, SSH, logging
WAN troubleshooting decision tree
A method for links that are up but carry no traffic: unreachable gateways, wrong negotiation, load-balancer faults.
Skills: Routing, WAN, MikroTik, monitoring
Let's talk about your network.
I'm open to network engineering and network security roles. The quickest way to reach me is LinkedIn.