root@netsec-hub:~$ ./init --domain=network,security,python
Enterprise Network & Cybersecurity Engineering — Automated with Python.
Field notes, tutorials, and tools for engineers working across routing, switching, Fortinet, cloud security, and infrastructure automation — grounded in real production problems, not generic theory.
01 // Insights
Deep dives on real-world networking and security failures.
OpenAI's models broke out of an evaluation sandbox and breached Hugging Face production. It's not a freak accident — it's a symptom of how fast the race is being run, and it rhymes with the nuclear tests that also went wrong.
Read more →A friendly intro to the Debian-based security distro, how to run it safely, and ten classic tools worth an evening each.
Read more →Use the browser's DevTools Network tab to see the API behind a web GUI — for faster troubleshooting and to automate clicky interfaces.
Read more →02 // Hands-on
Step-by-step, hands-on, and reproducible.
Mark traffic with a DSCP value, have an Aruba switch trust and queue it, then prove it on the wire and in the queue counters.
Read the guide →Reproduce the IPv6 RA-flood CPU DoS in a lab, then prove RA Guard on the switch filters it at the edge. Authorized testing only.
Read the guide →Build a full certificate set with OpenSSL (key, CSR, and cert), then install the right files on a Linux server, a firewall, and a switch.
Read the guide →03 // Utilities
Browser-based utilities for everyday engineering work.
IPv4 & IPv6 subnet math: network, broadcast, usable host range, masks, CIDR, and more.
Open tool →Your public IP (v4/v6) plus geo, ASN/ISP, reverse DNS, datacenter and TLS — looked up on our own server, not a third party.
Open tool →Validate JSON with clear, human-friendly error messages — then beautify or minify.
Open tool →Render device configs from a Jinja2-style template + JSON parameters — one config per device.
Open tool →Validate YAML with clear line/column errors and convert both ways between YAML and JSON.
Open tool →TCP MSS and UDP payload from an MTU, plus effective inner MTU after tunnel/encapsulation overhead.
Open tool →Expand a CIDR, convert an IP range to minimal CIDR blocks, and aggregate a list of subnets.
Open tool →