Defensive Ops › Network Architecture
Network Architecture — Design segmentation in, rather than bolting it on later
SIRI Security reviews and redesigns network architecture with segmentation and zero-trust principles built in from the design layer, rather than retrofitted after a flat network has already caused problems.
62%Of cloud detections
70%Of malware detections
29.44LIncidents CERT-In handled
Why defensive infrastructure is now explicitly in scope
Live tracking · scroll to see every relevant change
Growing gap
62% CLOUD
Cloud misconfiguration and IAM exploitation account for 62% of detections in cloud environments (DSCI) — the exact territory defensive ops work is built to harden.
Effective
31 JUL 2026
RBI's 2026 Framework expects demonstrable perimeter and access controls as part of continuous resilience, not a one-time network design review.
Baseline
70% MALWARE
Trojans and file infectors make up 70% of malware detections (Seqrite 2026) — relevant to how perimeter and endpoint defences are prioritised.
Baseline
6 HR WINDOW
CERT-In's notification window makes a hardened, well-segmented environment the difference between a contained incident and a sprawling one.
Extending
12–18 MO
RBI's historical pattern of extending bank requirements to NBFCs — defensive infrastructure expectations are likely on this same trajectory.
Hardened and kept hardened, not configured once and forgotten
What does Network Architecture review involve?
Network architecture built without security segmentation in mind tends to be flat — once an attacker is in anywhere, they're effectively in everywhere. Redesigning this after the fact is harder than building it in from the start, but still very much worth doing.
We assess your current architecture, design a segmentation model appropriate to your environment (VLANs, micro-segmentation, or a fuller zero-trust model depending on scale and need), and support implementation in phases that don't require a disruptive big-bang cutover.
Defensive infrastructure is tested, not just deployed
62% of cloud detections trace to misconfiguration and IAM exploitation (DSCI) — precisely the category ongoing cloud and network configuration management is designed to keep closed, not just check once.
SIRI Security delivers Network Architecture to this standard directly — practitioner-led, documented, and connected to SIRI Law LLP's legal and regulatory response if a finding ever needs to go further.
What organisations get wrong
Four assumptions that leave defensive infrastructure exposed
Defensive controls configured once tend to drift — new services, new access grants, new integrations all quietly erode the original design.
01 — DRIFT
“Our network architecture was reviewed at launch”
Access rules, cloud configurations, and network segmentation drift constantly as an environment grows — a launch-time review doesn't speak to today's state.
02 — SCOPE
“Perimeter security covers our cloud environment too”
Cloud misconfiguration is now a leading detection category (62%, DSCI) — a traditional perimeter mindset alone leaves that surface unmanaged.
03 — ACCESS
“Access grants are reviewed when someone leaves”
Access control drifts continuously, not just at offboarding — periodic review catches privilege creep that offboarding alone misses.
04 — DELIVERY
“Our CDN is just a performance tool”
CDN misconfiguration can expose origin infrastructure or enable cache-poisoning attacks — it carries its own security surface, not just a performance one.
What Network Architecture covers
What's included, start to finish
Defensive infrastructure hardened and kept that way as your environment changes.
01
Current architecture assessment
An honest picture of your actual network segmentation today, versus your network diagram's assumptions.
02
Segmentation model design
A design appropriate to your scale — VLANs, micro-segmentation, or zero-trust.
03
Zero-trust principles integration
Identity-based access controls layered in where they add real value, not as a buzzword.
04
Phased implementation planning
A migration path that avoids a disruptive single cutover.
05
Post-implementation validation
Testing to confirm the new segmentation actually holds under realistic conditions.
Evidence, not guesswork
No defensive ops programme vs. launch-time-only review vs. SIRI defensive ops
The gap between configured-once and continuously-managed is where drift quietly accumulates.
| Approach | No formal programme | Launch-time review only | SIRI Network Architecture |
|---|---|---|---|
| Ongoing configuration management | No | No | Included |
| Cloud-specific coverage | Rare | Depends on scope | Included |
| Access control review cadence | None | At offboarding only | Periodic, proactive |
| Network segmentation verified | No | At launch only | Reviewed on an ongoing basis |
| Satisfies RBI's resilience expectations | No | Partially | Yes |
Sources: DSCI cloud detection data; RBI (Commercial Banks — Cybersecurity, Technology: Risk, Resilience and Assurance Framework) Directions, 2026; Seqrite 2026 threat report. Summarised for comparison.
Numbers every board should know
What defensive ops work is actually protecting against
62%
Of cloud detections
Trace to misconfiguration and IAM exploitation (DSCI).
70%
Of malware detections
Are trojans and file infectors (Seqrite 2026).
29.44L
Incidents CERT-In handled
In the latest reporting year — the backdrop defensive hardening is measured against.
6 HR
CERT-In notification window
The deadline a well-segmented, hardened environment helps make achievable by containing an incident quickly.
Why SIRI for Network Architecture specifically
Defensive infrastructure managed by the same team that tests it
The practitioners who harden your perimeter and cloud configuration are the same ones who test whether it actually holds.
01
Directed by SIRI's Head of Cybersecurity
Vikram Rao, SIRI's Head of Cybersecurity, directs offensive security and incident response and leads CERT-In breach containment for enterprise clients.
02
Findings connected directly to legal exposure
SIRI Security runs under the same roof as SIRI Law LLP — when a finding carries real legal exposure, the engagement can be brought under attorney-client privilege from day one, not bolted on after the fact.
03
Cloud-aware by default
Coverage explicitly extends to cloud and virtualization environments, where the majority of current detections actually occur.
04
Built for RBI's specific resilience bar
Hardening and review cadence are scoped to the standard RBI's 2026 Framework expects from regulated entities.
Who this is built for
Organisations this defensive ops service is built for
Banks & NBFCs
SaaS & cloud-native companies
Organisations with growing cloud footprints
Enterprises with distributed or CDN-served content
Companies without a dedicated network security function
How we work
From scoping to ongoing delivery
01
Assessment & Design
We assess your current configuration and design the specific hardening or architecture changes needed.
Week 102
Implementation
Changes are implemented in coordination with your team, sequenced to avoid disrupting operations.
Weeks 2–303
Validation Testing
We validate the changes actually hold up against realistic testing, not just a configuration checklist.
Week 4+04
Ongoing Management
Where the service is ongoing, we continue to manage and adjust configuration as your environment evolves.
OngoingFrequently asked
Network Architecture, answered directly
Does this require replacing our network hardware?
Often not — much of this can be achieved through configuration of existing hardware; replacement is only recommended where genuinely necessary.
How disruptive is implementation?
We specifically design phased implementation plans to avoid a disruptive big-bang cutover.
How long does this take?
Most engagements in this category run 2 to 6 weeks depending on environment size and complexity.
Do you manage this ongoing, or is it a one-time project?
Both models are available — we scope this as a one-time hardening project or an ongoing managed service depending on what you need.
Harden it, then keep it that way
Scope Network Architecture.
Most engagements start with a configuration review before scoping ongoing management.
Talk to SIRI Security: +91 79819 12046
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