BIMI VMC vs CMC: Requirements, DMARC and Which Inboxes Show Logos
BIMI VMC vs CMC compared: trademark vs 12-month prior use, DMARC enforcement, SVG Tiny PS rules, and which mailbox providers (Gmail, Yahoo, Apple) show the logo.
October 6, 2026
Asterisk and FreePBX Toll Fraud Prevention: 10-Point Checklist
A 10-point toll-fraud checklist for Asterisk and FreePBX: SIP allow-lists, passwords, outbound patterns, channel limits, working fail2ban, alerts and incident steps.
October 6, 2026
3CX vs FreePBX: Licensing, Hosting, Features and Lock-in (2026)
Neutral 3CX vs FreePBX comparison for admins (Oct 2026): licensing, cost, hosting, features by edition, customisation and lock-in, sourced from vendor pages.
October 6, 2026
Asterisk Versions and EOL Dates: LTS Support Table and Upgrade Plan
Asterisk version support table with LTS and EOL dates from docs.asterisk.org (20, 21, 22, 23, planned 24), removed modules by version, and an upgrade checklist.
October 6, 2026
Windows 10 ESU After October 2026: Year 2 Options for IT
Windows 10 ESU Year 1 ends October 13, 2026 for businesses. Year 2 cost and activation IDs, the extended consumer end date, Windows 11 hardware checks and how to decide per device.
October 6, 2026
How Many SIP Channels Do You Need? Size SIP Trunks with Erlang B
Size SIP trunks properly: measure busy-hour traffic from your PBX CDR, convert it to Erlangs, choose channels with Erlang B for a 1% grade of service, then check bandwidth and set the channel limit on the PBX.
October 3, 2026
NTFS Permissions and Share Permissions: 7 Secure File Server Rules
Set up a Windows Server 2025 file share the maintainable way: simple share permissions, NTFS permissions granted to domain local groups (AGDLP), icacls and PowerShell commands, controlled inheritance, access-based enumeration and effective access checks.
September 30, 2026
Group Policy Processing Order: Complete LSDOU Guide with 10 Examples
Understand which GPO wins: local, site, domain and OU processing, link order, Enforced and Block Inheritance, loopback and computer vs user conflicts, with ten worked examples and the GPMC and PowerShell views that show the real result.
September 30, 2026
Migrate PBX to Cloud: 8-Step Plan From 3CX or Asterisk
An eight-step plan for moving from an on-premises 3CX, FreePBX or Asterisk system to a hosted phone system: what to inventory, how to test the network, how to pilot and port numbers, and what to keep when you switch the old PBX off.
September 30, 2026
VoIP Codec Bandwidth: G.711 vs G.729 vs Opus, Per-Call Figures
How much bandwidth each VoIP call really uses once packet headers are added, how SRTP and VPN tunnels change it, and how to size a connection for a given number of concurrent calls.
September 30, 2026
Warm Up New Mail Server IP Without Spam Problems
A practical warm-up plan for a new cPanel, DirectAdmin or Postfix mail server IP or a new sending domain — authentication first, a volume ramp by day, relay options, automated warm-up tools and the signals that tell you to slow down.
September 29, 2026
Best VPS for cPanel and DirectAdmin in 2026: What to Check
What actually matters when you pick a VPS for a cPanel, DirectAdmin or LiteSpeed hosting server — virtualization type, reverse DNS, outbound port 25, backups, licensing and support — and how InterServer, Vultr, DigitalOcean, Hostinger and Cloudways compare on those points.
September 29, 2026