NexusSec.Guides on security & networking
Practical, no-nonsense guides on VAPT, SD-WAN, zero trust, firewalls, and network design - written by the NexusSec team in Navi Mumbai.
The questions to ask your IT supplier
Most SMEs inherit their security posture from whoever set up the network. Eight questions that reveal whether the job was actually done.
Read → Operations · GrowingYour first 90 days without an IT team
Past the point where the network runs itself, not far enough to hire. What to do in three months, in order, and what to deliberately leave.
Read → Compliance · InsuranceWhat your cyber insurer actually wants to see
Renewal forms ask about MFA, backups, patching and testing. What the questions mean, and why answering them loosely is a claim risk.
Read → VAPT · BuyingWhat a good VAPT report should contain
How to tell a real penetration test from a scan exported to PDF, before you buy one. What to look for, and what should worry you.
Read → Network · SegmentationOne laptop should not reach everything
Most SME networks are flat: a machine in accounts can reach the ERP, the server and the CCTV recorder. What that costs, and how separation is done safely.
Read → Questionnaires · VAPTHow to answer a client security questionnaire
Twelve pages of security questions and the contract is waiting. What they are really checking, and why a wrong yes costs more than an honest no.
Read → Firewalls · BuyingBefore you sign the firewall renewal
A renewal quote is usually a reorder of what you bought three years ago. Five things to check before it becomes another three-year commitment.
Read → Operations · HandoverWhen the person who knew the network leaves
The network lived in one person's head and they have resigned. What to do in the first 48 hours, and what usually turns up in week one.
Read → Network · New sitesOpening a branch without inheriting a mess
Order the connectivity first, decide how the site reaches head office before buying hardware, and do not extend the flat network.
Read → Firewalls · Threat reportThe firewall became the way in
FortiBleed, CVE-2026-0257 and the SonicWall chain made edge appliances the top ransomware entry point in 2026. What to actually change.
Read → Compliance · IndiaDPDP Act: what to actually do in 2026
Rules are final, hard enforcement lands May 2027, and over 80% of Indian businesses have not started. Most of the work is infrastructure.
Read → Threats · IndiaIndia's 2026 threat numbers, translated
2.94 million incidents and a projected 30% rise. Three figures worth knowing, and what each should actually change on Monday.
Read → Firewalls · ComparisonSophos vs Fortinet: Which Firewall Should You Deploy?
An engineer-led comparison from a partner of both - management, performance, SD-WAN, licensing, and which fits your business.
Read → Firewalls · 2026Top Firewalls to Deploy in 2026: An Enterprise NGFW Guide
FortiGate, Palo Alto, Check Point, Sophos, WatchGuard, Cisco and pfSense compared - and how to choose the right one.
Read → Threats · 2026Top 10 Cybersecurity Threats in 2026 (India)
The threats Indian businesses must prepare for this year - and practical defences for each.
Read → Network SecurityTop 7 Network Security Mistakes Indian Businesses Make
The seven avoidable mistakes that get businesses breached - and how to fix each.
Read → VAPTWhat Is VAPT and Why Your Business Needs It
A plain-English explanation of vulnerability assessment and penetration testing - and how it protects your business.
Read → SD-WANSD-WAN vs MPLS: Which Is Right for Your Business?
How SD-WAN compares to traditional MPLS on cost, resilience, and security - and when to switch.
Read → Zero TrustA Practical Zero-Trust Checklist for Growing Businesses
Ten practical steps to move toward a zero-trust security model without boiling the ocean.
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