Cybersecurity & Networking Services
KohoJiro
Protecting small businesses with professional-grade security — clear reports, honest advice, real results.
↓
Cybersecurity & Networking Services
Protecting small businesses with professional-grade security — clear reports, honest advice, real results.
I'm Justin Gerbert, founder of KohoJiro Cybersecurity & Networking Services, based in Hilo, Hawaii. With over five years of IT support experience spanning help desk, network troubleshooting, VoIP, and security monitoring, I started KohoJiro to bring professional cybersecurity capabilities to small businesses that can't afford enterprise solutions.
I'm currently completing the Google Cybersecurity Professional Certificate and run an active home security lab (Project Karasu) — a real-world environment where I practice threat detection, honeypot deployment, and network hardening every day.
I believe cybersecurity advice should be clear, actionable, and honest — not buried in jargon designed to upsell you.
Professional cybersecurity & networking services tailored for small businesses, freelancers, and individuals who need real protection without enterprise pricing.
Professional vulnerability scans using Nmap, Nessus, and OpenVAS converted into a clear, human-readable PDF report with prioritized findings and remediation steps.
A comprehensive review of your network architecture, device inventory, open ports, and security posture — delivered as a written report with specific, actionable recommendations.
Already have scan data but need it turned into a professional deliverable? I translate raw tool output into clear, client-ready reports your stakeholders can actually understand.
Hands-on configuration of firewalls, routers, and systems to close common vulnerabilities. Includes before/after documentation so you can see exactly what changed and why.
Configuration and deployment of security monitoring tools including Pi-hole DNS filtering, Fail2Ban intrusion prevention, and log monitoring — giving you real visibility into your network.
Complete small office and home office network design and installation. From layout planning to hardware selection, configuration, and testing — delivered ready to use.
Professional Cat5e/Cat6 cable runs for homes and small offices. Clean, labeled, tested installations built to last — no shortcuts, no guesswork.
All prices are starting rates. Final pricing depends on scope, complexity, and location. Contact me for a free estimate.
My personal security lab — a real-world environment running 24/7 to sharpen detection skills, test configurations, and document findings.
Deployed a Cowrie medium-interaction SSH honeypot to capture and analyze unauthorized access attempts. Logs attacker behavior, credential stuffing patterns, and post-login commands in a safe isolated environment.
Running Pi-hole for DNS-level ad and malware domain blocking across the entire home network. Configured custom blocklists and whitelist rules, monitoring query logs for anomalous lookup patterns.
Fail2Ban configured to monitor SSH, web server, and application logs — automatically banning IPs exceeding failed login thresholds. Custom jail rules tuned to reduce false positives.
Traefik reverse proxy managing internal service routing with automatic TLS certificate provisioning via Let's Encrypt. Containerized services isolated behind a single hardened entry point.
Have a question, a project in mind, or just want to know where your biggest risks are? Reach out — first conversation is always free.