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Andrax Pentester

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network security — Andrax Pentester

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network security

Published work tagged network security.

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ArticleDefensive Security

IPv4 Notation & CIDR Explained: Decimal, Hex, Binary (2026)

An IPv4 address is one 32-bit number. Here is how to read it as decimal, hex, binary or integer, size a CIDR block, and spot private ranges.

Syed Zada Abrar · 9 min

Article

Defensive Security

SSL/TLS Certificates Explained: Chain, SAN & Expiry (2026)

A TLS certificate binds a domain name to a public key. Here is how I read one, trace its chain, fix common errors, and check CSRs and CAA records.

Syed Zada Abrar · 11 min

ArticleOffensive Security

Penetration Testing Checklist: Complete 2026 Guide

Master penetration testing with our comprehensive 2026 checklist. From pre-engagement to reporting, this guide covers every phase of a professional pentest with…

Syed Zada Abrar · 23 min