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Cybersecurity Insights.

Expert guidance on protecting your business from modern cyber threats — EDR, MFA, ransomware response, compliance, and security architecture.

58 articles in Cybersecurity
58 articles
Cybersecurity

Rotate DKIM Keys in Microsoft 365: Two Rotations to Reach 2048 Bits

DKIM was enabled on your Microsoft 365 domain years ago and the keys have never changed, probably at 1024 bits. This walks through the selector swap, the exact PowerShell and portal steps, the 96-hour changeover, the two rotations needed to reach 2048, and the third-party signers a rotation never touches.

2026-10-30 · 9 min readRead →
Cybersecurity

MFA Bypassed? Token Theft and the AiTM Response in Microsoft 365

A user approved the MFA prompt, yet the attacker is reading their mailbox from another country. This explains how adversary-in-the-middle phishing steals the session rather than breaking MFA, the Microsoft 365 response sequence in the right order, and which controls actually stop the replay, with their documented limits.

2026-10-27 · 10 min readRead →
Cybersecurity

Windows LAPS Intune Setup: One Rotating Admin Password Per PC

Every PC in the office shares one local admin password set years ago. This walks through Windows LAPS with Intune and Entra ID: the tenant switch, each policy setting and its limits, retrieval roles, manual rotation, the failure modes, and a break-glass drill for a 25-PC office.

2026-10-26 · 10 min readRead →
Cybersecurity

The SPF Ten-Lookup Limit: How One SaaS Tool Breaks Your Mail

Adding one include can push an SPF record past ten DNS lookups, and RFC 7208 requires receivers to return permerror. The record still looks valid to the eye and to many checkers, the failure moves between senders, and under a DMARC policy of reject the message rides entirely on DKIM.

2026-09-21 · 13 min readRead →
Cybersecurity

Moving DMARC From p=none to p=reject Without Losing Mail

Most domains publish p=none, which detects spoofing but blocks none of it. This walks the staged path to enforcement: what the removed pct tag actually did, why aligned DKIM is what saves forwarded mail, and a readiness test to run before you change the record.

2026-09-16 · 15 min readRead →
Cybersecurity

How to Actually Read a DMARC Aggregate Report

You turned DMARC on and the zipped XML started arriving daily. This walks the report structure field by field, shows how to tell a real spoof from a broken SaaS sender or a forwarder that kept DKIM, and explains why zero failures is a narrower claim than it looks.

2026-09-15 · 9 min readRead →
Cybersecurity

Your MSP Filled Out the Form. You Signed It.

The technical answers came from your IT provider. The signature is yours. And the harder problem is not the application at all — it is proving the control stayed true all year.

2026-08-11 · 10 min readRead →