Alphabetical Index
A B C D E F G H I K L M N O P R S T U V W Y
A
- A2Billing VoIP Billing Engine: Architecture, AGI Integration, and Rate Management Telecom
- How A2Billing integrates with Asterisk via AGI for real-time call billing, rate deck structure, calling card IVR flow, and MySQL database…
- ACL Analytics & Excel Data Manipulation Reference Analytics
- Production-grade scripts, formulas, and audit patterns — from data cleaning through fraud detection. Built for professional auditors and data analysts…
- Active Directory Management: Domain Controllers, FSMO Roles, Replication, DNS & Best Practices Systems
- Active Directory is the identity and access backbone of nearly every Windows-based enterprise network. Understanding its architecture — how Domain…
- Advanced Integer Factorization Using the Quadratic Sieve Algorithm Cryptography
- This document covers the design and implementation of an efficient integer factorization tool using the Quadratic Sieve (QS) algorithm.
- Asterisk PBX Architecture: Channel Drivers, Dialplan Engine, and AGI Integration Telecom
- Core Asterisk components — chan_pjsip, extensions.conf dialplan logic, AGI scripting, AMI/ARI interfaces, CDR to MySQL, and STIR/SHAKEN…
B
- Banking and Paying Safely Online Security Awareness
- Security Awareness · July 2026 · Ioannis (John) Konstas
- BGP and Autonomous Systems: Routing You Can Trust Networking
- Articles · July 2026 · Ioannis (John) Konstas
- Bitcoin & Crypto Node Tools Cryptography
- A technical reference for Bitcoin node operators — covering live block monitoring, blockchain queries, halving phase analysis, threat detection, and r…
- Bitcoin Blockchain Data Platform & Genesis Block Deep Dive Cryptography
- A comprehensive reference covering the architecture, revenue model, and API design for a Bitcoin historical data platform — plus a technical deep dive…
- Bitcoin LXD Sandbox — Network Isolation Analysis Systems
- Analysis of a Bitcoin node running inside an LXD container (bitcoin-sandbox) on Ubuntu 24.04, confirming correct network isolation from the host…
- Building a Production CLEC Stack: Asterisk 22 + Kamailio 5 + A2Billing on Docker Telecom
- This article documents the full integration of a production-grade Competitive Local Exchange Carrier (CLEC) platform using Asterisk 22, Kamailio 5, and…
- Building an Open-Source Security Monitoring Stack Security Operations
- Articles · July 2026 · Ioannis (John) Konstas
C
- Complete Reference Guide: Modular Arithmetic & Equivalence Classes Cryptography
- A complete, self-contained reference guide bringing together core principles, definitions, equivalence classes modulo 8, calculations, and algebraic proofs…
- Carrier-Grade SIP Infrastructure: 10-VM Open Source Telecom Stack Architecture Telecom
- Architecture, network segmentation, jumbo frames, and call flow for a production VoIP carrier stack built entirely on open source…
- A Cascade of Factoring Techniques: From Pollard's Rho to the General Number Field Sieve Cryptography
- While the General Number Field Sieve (GNFS) remains the premier method for factoring very large integers, other techniques are used depending on the size of…
- CCIE Advanced Lab — 20-Router MPLS + DMVPN Topology CCIE Lab
- 20 hands-on labs on one 20-router topology: MPLS core with LDP and L3VPN, dual DMVPN clouds, BGP route reflection and confederations, OSPF/EIGRP desig
- CCIE Enterprise Lab — 18 Labs, Full EI v1.0 Blueprint CCIE Lab
- 18 labs covering 100% of the CCIE Enterprise Infrastructure v1.0 blueprint across five domains: campus switching, routing protocols, transport (MPLS/D
- Cisco CSR1000v: Converting Serial Consoles to a Secure REST API Networking
- Cisco CSR1000v instances running on ESXi expose their consoles via serial-over-network — Telnet sessions mapped to incremented ports (2301–2320). This is…
- Cisco Device Hardening: Disabling Call Home and Controlling Outbound Communications Networking
- Cisco networking equipment ships pre-configured with telemetry and support features — including Call Home, Smart Licensing transport, and HTTP management…
- Cisco IOS Path Selection: How a Router Chooses the Best Route Networking
- How Cisco IOS picks one path from many: longest prefix match, Administrative Distance, metric, and the lowest-instance tie-break, then how the RIB feeds the FIB for hardware forwarding. By Ioannis (John) Konstas.
- Cisco IOS Survival: Password Recovery, ROMMON, and SSH Networking
- Articles · July 2026 · Ioannis (John) Konstas
- Cisco Nexus 1000V Port Channels and Trunking: Troubleshooting Guide Networking
- End-of-Life Notice: Cisco announced End-of-Sale for the Nexus 1000V for VMware vSphere in 2019 and End-of-Support in 2025. This product should not be…
- Cisco UC500 / CME Lab: Unified Communications Manager Express Configuration Networking
- Architecture of CME 8.6 on a UC520, SCCP ephone configuration, FXO/FXS voice ports, DHCP for phones, CUE module, and Python serial console…
- Classical Machine Learning Still Wins on Tables Data Science
- Data Science Series · July 2026 · Ioannis (John) Konstas
- Cybersecurity for Small Business Security Awareness
- Security Awareness · July 2026 · Ioannis (John) Konstas
D
- Diplomacy in the Age of Code: Blinken at the RSA Conference Policy & Security
- Six foundational technologies, cyber-physical risk, AI governance and trusted supply chains, with what it means for security practitioners.
- Data Science for Security Operations Data Science
- Data Science Series · July 2026 · Ioannis (John) Konstas
- Data Wrangling: Polars, Pandas, and Parquet Data Science
- Data Science Series · July 2026 · Ioannis (John) Konstas
- Deep Learning with PyTorch Data Science
- Data Science Series · July 2026 · Ioannis (John) Konstas
- Deepfakes: How They Work and How to Spot Them AI & Security
- Articles · July 2026 · Ioannis (John) Konstas
- Docker VoIP Stack: Boot Sequencing, Health Checks, and Dependency Management Telecom
- How to correctly order Docker container startup for a Kamailio + Asterisk + A2Billing stack using health checks, and bridging VLAN-isolated IP…
E
- Endgame and the Blurring Line of Cyber Warfare Cybersecurity
- The rise of Endgame in the early 2010s marked a critical shift in cybersecurity — the commercialization of advanced offensive capabilities. What once …
- ESXi CPU Temperature Monitor: A Shell Script for Real-Time IPMI Alerting Virtualization
- ESXi does not ship with a continuous, color-coded temperature dashboard. If you manage bare-metal hosts in a lab or production environment and want immediate…
- ESXi Recovery Playbook: hostd, localcli, vim-cmd, and Log Triage Virtualization
- When the vSphere client cannot reach an ESXi host and PowerCLI connections time out, the management agent (hostd) has likely crashed or failed to start. This…
- Gatekeeping the Built-In Administrator: A Break-Glass Blueprint for the RID-500 Account Identity Security
- Most organizations still have the RID-500 Administrator enabled. How to vault it under dual custody, isolate it to Tier 0, deny it everywhere by GPO, and alarm every use.
- The Executive Briefing Security Awareness
- Security Awareness · July 2026 · Ioannis (John) Konstas
- Expert Review: Energy-Efficient Approaches to the General Number Field Sieve Cryptography
- The project proposal accurately identifies a critical nexus in modern computational security: the convergence of classical cryptanalysis, high-performance computing, and sustainable computing.
- Extended Euclidean Algorithm, Euler's Theorem & Cryptological Applications Cryptography
- The Greatest Common Divisor (GCD) of two integers is the largest integer that divides both without remainder — Euclid's algorithm computes it in O(log min(a,b)) steps.
F
- A Field Guide to Denial-of-Service Attacks Cybersecurity
- Articles · July 2026 · Ioannis (John) Konstas
- The Field, Mapped Data Science
- Data Science Series · July 2026 · Ioannis (John) Konstas
- Firewall Architectures, From Packet Filters to Zero Trust Networking
- Articles · July 2026 · Ioannis (John) Konstas
- Fixing a Broken SSV Seal MacBook Pro Restored from a Mac mini over Thunderbolt Target Disk Mode Systems
- This report documents a full macOS restoration performed on a MacBook Pro (Late 2019, Intel, T2 Security Chip) using a Mac mini (M4 Pro, Apple Silicon…
- Floating Static Routes: Backup Path Selection in Cisco Networks Networking
- A floating static route is a backup route with a higher Administrative Distance than the primary path, so Cisco IOS keeps it out of the table until the preferred route fails — simple, protocol-free failover for WAN and Internet links. By Ioannis (John) Konstas.
- Formal Security Models: Bell-LaPadula and Biba Foundations
- Articles · July 2026 · Ioannis (John) Konstas
G
- Galois Fields in AES — Reference Cryptography
- Mathematical reference for the Galois Field arithmetic that underpins AES encryption. Covers GF(2⁸) structure, polynomial representation, the AES irreducible…
- Galois Fields in AES: GF(2^8), Irreducible Polynomials, and the Extended Euclidean Algorithm Cryptography
- AES — the symmetric cipher protecting the majority of encrypted data on the internet — is built on a branch of mathematics that most engineers never…
H
- HF Point-to-Point CommunicationHarris Modem Interface, STANAG Waveforms & Signal Processing Communications
- A technical framework for High Frequency point-to-point communication using Harris military-grade modems, covering the full stack from ionospheric propagation theory through hardware.
- High-Frequency Radio: Still Vital in a Satellite World Communications
- Articles · July 2026 · Ioannis (John) Konstas
- How Bitcoin Core Stores the Blockchain Systems
- Articles · July 2026 · Ioannis (John) Konstas
I
- Identity Theft and Internet Scams Security Awareness
- Security Awareness · July 2026 · Ioannis (John) Konstas
- Information Security Fundamentals: CIA, Risk, Access Control, Cryptography & Compliance Security
- Sound information security practice rests on a small number of foundational concepts that appear repeatedly across every framework, standard, and regulation…
- Inside Classified Networks: NIPRNet, SIPRNet, and JWICS Networking
- Articles · July 2026 · Ioannis (John) Konstas
K
- Konstas Markets Desk: An FX Dealing Room on One Mac Trading Systems
- A complete FX dealing-room training system: eight competing banks, Reuters-style conversations, client calls, forwards and money markets, a full back office, and every ACI Dealing formula.
- Kamailio SIP Server: Proxy, Load Balancer, and Session Border Controller Telecom
- Architecture, core modules, dispatcher load balancing, fraud protection, TLS, and RTPEngine integration for Kamailio in a production VoIP…
L
- Lab 01 — MPLS Core LDP CCIE Lab
- MPLS Core LDP Label Distribution
- Lab 01 — Switched Campus — STP, EtherChannel & VLANs CCIE Lab
- Switched Campus — STP, EtherChannel & VLANs
- Lab 02 — EIGRP Named Mode & Advanced Features CCIE Lab
- EIGRP Named Mode & Advanced Features
- Lab 02 — MPLS L3VPN — VRF CORP End-to-End CCIE Lab
- MPLS L3VPN — VRF CORP End-to-End
- Lab 03 — MPLS VPN — PE-CE BGP with AS Override CCIE Lab
- MPLS VPN — PE-CE BGP with AS Override
- Lab 03 — OSPF Multi-Area — OSPFv2 & OSPFv3 CCIE Lab
- OSPF Multi-Area — OSPFv2 & OSPFv3
- Lab 04 — BGP Policies, Communities & Path Control CCIE Lab
- BGP Policies, Communities & Path Control
- Lab 04 — MPLS VPN — VRF Internet Access and Route Leaking CCIE Lab
- MPLS VPN — VRF Internet Access and Route Leaking
- Lab 05 — MPLS VPN — OSPF Sham-Link for Backdoor Suppression CCIE Lab
- MPLS VPN — OSPF Sham-Link for Backdoor Suppression
- Lab 05 — Multicast — PIM-SM, Anycast RP & MSDP CCIE Lab
- Multicast — PIM-SM, Anycast RP & MSDP
- Lab 06 — DMVPN Phase 3 — West Region Dual-Hub CCIE Lab
- DMVPN Phase 3 — West Region Dual-Hub
- Lab 06 — MPLS LDP & L3VPN (VPNv4/VPNv6) CCIE Lab
- MPLS LDP & L3VPN (VPNv4/VPNv6)
- Lab 07 — DMVPN Phase 3 — Dual-Hub & Per-Tunnel QoS CCIE Lab
- DMVPN Phase 3 — Dual-Hub & Per-Tunnel QoS
- Lab 07 — DMVPN Phase 3 — East Region with QoS Marking CCIE Lab
- DMVPN Phase 3 — East Region with QoS Marking
- Lab 08 — DMVPN EIGRP — Summarization, Stub, and Leak-Map CCIE Lab
- DMVPN EIGRP — Summarization, Stub, and Leak-Map
- Lab 08 — FlexVPN — IKEv2 Site-to-Site & Spoke-to-Spoke CCIE Lab
- FlexVPN — IKEv2 Site-to-Site & Spoke-to-Spoke
- Lab 09 — BGP Route Reflection — iBGP Scalability CCIE Lab
- BGP Route Reflection — iBGP Scalability
- Lab 09 — Switch Security — 802.1X, DHCP Snooping & DAI CCIE Lab
- Switch Security — 802.1X, DHCP Snooping & DAI
- Lab 10 — BGP Confederation — Sub-AS Architecture CCIE Lab
- BGP Confederation — Sub-AS Architecture
- Lab 10 — Device Security — CoPP, AAA & uRPF CCIE Lab
- Device Security — CoPP, AAA & uRPF
- Lab 11 — BGP Communities — Tagging and Policy Control CCIE Lab
- BGP Communities — Tagging and Policy Control
- Lab 11 — QoS — MQC, DiffServ & HQoS CCIE Lab
- QoS — MQC, DiffServ & HQoS
- Lab 12 — BGP Prefix Filtering — Prefix-List, ORF, and Distribute-List CCIE Lab
- BGP Prefix Filtering — Prefix-List, ORF, and Distribute-List
- Lab 12 — Network Services — FHRP, DHCP, NAT & NTP CCIE Lab
- Network Services — FHRP, DHCP, NAT & NTP
- Lab 13 — Optimization & Operations — IP SLA, NetFlow & SPAN CCIE Lab
- Optimization & Operations — IP SLA, NetFlow & SPAN
- Lab 13 — OSPF Multi-Area Design — Stub, NSSA, Type-3 Filtering CCIE Lab
- OSPF Multi-Area Design — Stub, NSSA, Type-3 Filtering
- Lab 14 — Cisco SD-Access — Design & Deployment CCIE Lab
- Cisco SD-Access — Design & Deployment
- Lab 14 — OSPFv3 Dual-Stack — IPv6 Backbone Routing CCIE Lab
- OSPFv3 Dual-Stack — IPv6 Backbone Routing
- Lab 15 — Cisco SD-WAN — vManage, OMP & Policies CCIE Lab
- Cisco SD-WAN — vManage, OMP & Policies
- Lab 15 — EIGRP Named Mode — Wide Metrics and Address Families CCIE Lab
- EIGRP Named Mode — Wide Metrics and Address Families
- Lab 16 — EEM Applets & Guest Shell Python CCIE Lab
- EEM Applets & Guest Shell Python
- Lab 16 — MPLS Traffic Engineering — TE Tunnels and RSVP CCIE Lab
- MPLS Traffic Engineering — TE Tunnels and RSVP
- Lab 17 — Multicast PIM Sparse Mode — Auto-RP and MSDP CCIE Lab
- Multicast PIM Sparse Mode — Auto-RP and MSDP
- Lab 17 — NETCONF/YANG & RESTCONF — IOS XE API CCIE Lab
- NETCONF/YANG & RESTCONF — IOS XE API
- Lab 18 — API Programmability — DNA Center & vManage CCIE Lab
- API Programmability — DNA Center & vManage
- Lab 18 — QoS on DMVPN — DSCP Classification, LLQ, and Shaping CCIE Lab
- QoS on DMVPN — DSCP Classification, LLQ, and Shaping
- Lab 19 — 6PE — IPv6 over MPLS without P-Router IPv6 CCIE Lab
- 6PE — IPv6 over MPLS without P-Router IPv6
- Lab 20 — Full Integration — All Protocols Simultaneously CCIE Lab
- Full Integration — All Protocols Simultaneously
- Large-Scale Genomic Data Processing Data Science
- Educational Bioinformatics Pipeline Reference · macOS · GRCh37 / GRCh38
- Layered Security Stack Architecture
- A privacy-first, full-tunnel architecture combining WireGuard, encrypted DNS, network IDS, and SIEM — deployed on a client/server model.
M
- Malware and Ransomware, Demystified Security Awareness
- Security Awareness · July 2026 · Ioannis (John) Konstas
- Maximizing Bitcoin Analytics with Local Snapshots Cryptography
- How a full Bitcoin snapshot (~700 GB) with txindex enables high-speed offline analytics, Electrum/Esplora indexing, and privacy-preserving blockchain research.
- Memory Safety, Buffer Overflows & Baggy Bounds Offensive Security
- A unified technical reference for system programmers, security engineers, and reverse engineers — from overflow fundamentals through allocator interna…
- Meta / Facebook Surveillance Architecture & Technical Privacy Defense Privacy
- A technical analysis of Meta's cross-site tracking infrastructure, their 2024–2026 policy changes, and a working layered defense stack validated in pr…
- The Modern Python Stack Data Science
- Data Science Series · July 2026 · Ioannis (John) Konstas
- Mutation-Based Fuzzing: From Commodore 64 POKEs to Drone Firmware Offensive Security
- Working Python mutators for text and MAVLink telemetry, binary-fuzzing feedback without source, and a field guide to firmware and UAV fuzzing tools.
N
- Name Standardization & Filtering Analytics
- Reusable ACL Analytics patterns for text normalization, structured key generation, multi-segment name codes, and exclusion filters for audit-ready dat…
- Network Jitter, Standard Deviation & Bandwidth Measurement Networking
- A technical reference for network engineers — covering RTT variance analysis, jitter classification, bandwidth testing, and annotated Python diagnosti…
O
- Overview of Cryptology Cryptography
- Taxonomic architecture of modern cryptology: Cryptography (Symmetric Ciphers, Asymmetric Ciphers, Protocols) and Cryptanalysis (Mathematical, Side-Channel, Quantum threats).
- Online Gaming Without the Griefers Security Awareness
- Security Awareness · July 2026 · Ioannis (John) Konstas
- The OSI and TCP/IP Models, Revisited Networking
- Articles · July 2026 · Ioannis (John) Konstas
P
- Passwords, Passkeys, and MFA Security Awareness
- Security Awareness · July 2026 · Ioannis (John) Konstas
- Penetration Testing Professional Reference Guide Offensive Security
- Rationale, methodology, network attack taxonomy, tooling reference, and service provider selection criteria — for security engineers, compliance teams…
- Penetration Testing, End to End Offensive Security
- Articles · July 2026 · Ioannis (John) Konstas
- Phishing in the Age of AI Security Awareness
- Security Awareness · July 2026 · Ioannis (John) Konstas
- Post-Quantum Cryptography Is Now a Deadline Cryptography
- Articles · July 2026 · Ioannis (John) Konstas
- Public-Key Cryptosystems Based on the Discrete Logarithm Problem Cryptography
- Technical reference on the Discrete Logarithm Problem (DLP), Diffie-Hellman Key Exchange (DHKE), and the ElGamal Public-Key Cryptosystem — mathematical mechanics, computational hardness, and modern cryptographic applications.
- The Power of Software-Defined Systems Architecture
- Articles · July 2026 · Ioannis (John) Konstas
- PowerCLI ESXi Shutdown: Code Review and Production Rewrite Virtualization
- The original PowerCLI shutdown script circulating across VMware communities is widely copy-pasted into production runbooks. It works in a lab — but it has…
- PowerShell Active Directory Reference Systems
- A professional collection of modern PowerShell 7 scripts for Active Directory administration — covering the full lifecycle from user provisioning to d…
R
- Raising Digital Natives Security Awareness
- Security Awareness · July 2026 · Ioannis (John) Konstas
- Ransomware Defense in 2026 Cybersecurity
- Articles · July 2026 · Ioannis (John) Konstas
- Reclaiming Your Privacy Security Awareness
- Security Awareness · July 2026 · Ioannis (John) Konstas
- Reporting a Cybercrime Security Awareness
- Security Awareness · July 2026 · Ioannis (John) Konstas
- Restoring Microsoft 365 Mail Flow After a Domain Re-Add Email Security
- Why removing and re-adding a domain in a Microsoft 365 tenant breaks autodiscover, DomainKeys Identified Mail (DKIM), and MX in scattered ways — and the outside-in DNS recovery…
- RTPEngine: Media Proxy for VoIP — NAT Traversal, Transcoding, and SRTP Telecom
- How RTPEngine solves NAT, codec mismatches, and media security in a Kamailio-based VoIP platform, with configuration and capacity reference.Why…
S
- SD-WAN Lab Blueprint — Cisco CSR1000v v17.03.03 Networking
- Three CSR1000v edges dual-homed across two independent transports for automatic failover, with a full SD-WAN controller stack — vBond, vSmart, vManage — plus the underlay OSPF and overlay configuration.
- SENTINEL: An Autonomous, Quantum-Safe Defense Platform Security Operations
- Zero Trust, active deception, and post-quantum cryptography (FIPS 203/204), built as a closed-loop, self-correcting system rather than a passive alert stream.
- SENTINEL Mobile Shield: Hardened Endpoint Security & Zero-Trust Tunnel Architecture Security Architecture
- Mobile security architecture and capability overview: dual-stack ChaCha20-Poly1305 encryption, live-path inline intrusion detection, DNSSEC-validated DoH, and zero-trust per-device isolation.
- Securing the Connected Home Security Awareness
- Security Awareness · July 2026 · Ioannis (John) Konstas
- Shipping It: MLOps Without the Buzzwords Data Science
- Data Science Series · July 2026 · Ioannis (John) Konstas
- Side-Channel and Timing Attacks Cryptography
- Articles · July 2026 · Ioannis (John) Konstas
- SS7 (Signaling System No. 7) — Technical Reference Telecom
- Signaling System No. 7 (SS7) is an architecture for performing out-of-band signaling in support of the call-establishment, billing, routing, and information-exchange functions of the PSTN.
- Statistics That Earn Their Keep Data Science
- Data Science Series · July 2026 · Ioannis (John) Konstas
- STIR/SHAKEN: FCC-Mandated Call Authentication for VoIP Carriers Telecom
- How STIR/SHAKEN works, attestation levels A/B/C, PASSporT token structure, STI-CA certificate requirements, and Asterisk implementation.What Is…
- Strategic Business Impact Planning Techniques Information Systems Strategy
- An academic analysis of business–information systems alignment, competitive advantage, and strategic value creation across the seminal SISP frameworks (Porter, McFarlan, Parsons, Benjamin, Rackoff, Robson, Rockart), 1979–1997. By Ioannis (John) Konstas.
- The Stack Security & Infrastructure
- The operational security and infrastructure stack I designed and run myself: autonomous defense, edge mitigation, post-quantum cryptography, and encrypted infrastructure.
T
- TCP/IP: The Protocol Suite Behind the Internet Networking
- From ARPA experiments to the Internet's common language: milestones, the four layers, Internet governance and how RFCs become standards.
- TTB COLA Label Compliance AI Inspector Interactive AI Tool
- Automated sub-second 27 CFR Label Verification & Compliance Audit System for TTB agents — verifying brand names, ABV/proof consistency, standards of identity, and strict Part 16 Government Health Warnings with interactive bounding box canvas and batch importer.
- A Technical Comparison of IBM PowerHA Storage Replication and IBM Journal-Based Replication Systems
- IBM PowerHA replicates at the SAN block level; Journal-Based Replication works inside the OS at the object level -- and that one architectural difference explains everything downstream.
- Traveling with Technology Security Awareness
- Security Awareness · July 2026 · Ioannis (John) Konstas
U
- Understanding Insider Threats Security Awareness
- Security Awareness · July 2026 · Ioannis (John) Konstas
- Using Social Media Without Oversharing Security Awareness
- Security Awareness · July 2026 · Ioannis (John) Konstas
V
- Visualization and Storytelling Data Science
- Data Science Series · July 2026 · Ioannis (John) Konstas
- VMware ESXi Hardening: A 45-Control Security Configuration Assessment Virtualization
- ESXi hypervisors are the foundation of every virtual infrastructure — and because every workload runs on top of them, a misconfigured host is a single point…
- VMware Infrastructure Architecture Overview Virtualization
- Historical reference: This article documents the VMware Infrastructure 3 / early vSphere architecture. Components referenced here — ESX Server, VirtualCenter…
- VMware SD-WAN VeloCloud: Security Hardening Guidelines Networking
- Compromised network devices can be used to redirect traffic, exfiltrate data, and pivot into internal systems — making SD-WAN Edge hardening a critical part…
- VMware vSphere 7 Security Configuration Guide: A Practitioner's Overview Virtualization
- The VMware vSphere Security Configuration Guide (SCG) is the official baseline for hardening and auditing vSphere infrastructure. Version 7 — which…
- Voice VLAN Design: PoE Switch Configuration and Cisco IP Phone Provisioning Networking
- Separating voice and data traffic with IEEE 802.1Q VLANs, PoE switch configuration, TFTP/DHCP provisioning for Cisco IP phones, and the SCCP…
W
- Why 26! ≈ 2⁸⁸: Substitution Cipher Key Space, Bit Depth & Mental Estimation Cryptography
- Converting 26! alphabet permutations into base-2 logarithmic bit depth (2⁸⁸), Python verification, and 3 mental arithmetic shortcuts.
- Wi-Fi: Public Networks and Your Own Security Awareness
- Security Awareness · July 2026 · Ioannis (John) Konstas
- Working with Large Language Models Data Science
- Data Science Series · July 2026 · Ioannis (John) Konstas
- Wrapping Legacy Network Gear in a Modern API Automation
- Turning legacy Telnet-only router consoles into an authenticated REST API with total network isolation, the Netmiko alternative for SSH-native fleets, and the roadmap toward a full automation platform.
Y
- Your Phone Is Your Perimeter Security Awareness
- Security Awareness · July 2026 · Ioannis (John) Konstas