Notes • Testing • Investigations

Blog

Longer technical notes on things I've actually worked through, tested, or spent enough time researching to have something useful to say about.

SECURITY VALIDATION 12 min read • August 23, 2026

RyanReasons.com Security Validation

I tested my own portfolio from the public Internet and from inside the lab, rejected evidence I could not defend, remediated what I found, and left one result inconclusive.

Cloudflare Tunnel Nginx Hardening Negative Testing DMZ Segmentation
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NETWORK SECURITY 8 min read • August 20, 2026

Firewall Policy Validation

A firewall rule can look completely correct in the management interface and still not prove what the network is actually doing. I started treating configuration as intent and traffic, listener state, counters, and packet captures as the evidence.

Firewall Policy Negative Testing Packet Analysis
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NETWORKING / IPv6 SECURITY 10 min read • August 20, 2026

IPv6 Security in Dual-Stack Networks

IPv6 is not just IPv4 with longer addresses. Once a network becomes dual-stack, addressing, router discovery, firewall policy, monitoring, DNS behavior, and validation all have another path that needs to be understood and tested.

IPv6 Architecture Dual-Stack Security ICMPv6 / NDP
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UPCOMING WRITE-UP

More technical writing is coming soon.

Additional technical research, security testing notes, and implementation runbooks are currently being prepared for publication.