Stop the spread before it starts.
Flat networks are why ransomware that hits one laptop ends up on every server. Segmentation puts internal walls between parts of your business — finance, factory floor, guest Wi-Fi, IoT cameras — so a compromise in one place can't reach the others. Done well, it's invisible to your team. Done badly, it breaks everything.
Why flat networks bite.
Ransomware hit the receptionist's laptop. It hit the file server next.
Same network, nothing in between. Lateral movement is trivial.
Guest Wi-Fi is on the same VLAN as production.
Visitors can scan the office network. Auditor flagged it. CISO didn't know.
IP cameras, smart TVs, conference equipment all chatting freely.
Half of these devices haven't had a security update since 2019. They live next to your finance server.
PCI scope is the whole office.
Card data touches one workstation. Now your whole network is in PCI scope. Audit just got 10x more expensive.
What we design.
- 01
Segmentation map
Every system, every user, every device categorized. Which segments need to talk to which.
- 02
VLAN + firewall design
Hardware-level separation between segments. Cross-segment traffic only through firewall with explicit rules.
- 03
PCI scope reduction
Card data isolated to a small segment. Rest of network out of scope. Audit gets shorter and cheaper.
- 04
IoT containment
Cameras, smart TVs, printers, conference gear on their own VLAN. Limited internet, no internal access.
- 05
Phased rollout
Segment by segment, not big bang. Test traffic, fix what breaks, move on.
- 06
Documentation + diagrams
Network map every IT person can read. Updated when segments change.
How we segment without breaking things.
Discovery
Inventory every device, every app, every traffic flow. Identify dependencies.
Design
Segmentation map. Which devices in which VLAN. Which cross-segment flows are allowed. Documented.
Lab + pilot
Test config in a parallel environment. Migrate one low-risk segment as a pilot.
Rollout
Segment by segment. Each migration includes traffic testing and a rollback plan.
Validate + document
Final network map. Verify no unintended blocks. Hand over diagrams + access rules.
Tools we use.
Impact of segmentation.
In simulated ransomware scenarios post-segmentation.
Typical when card-data systems are isolated to a dedicated segment.
Of cross-segment flows broken by our design. Always caught and fixed in pilot.
We segment in waves. Never all at once.
“We had everything on one flat network — head office, factory floor, guest Wi-Fi, security cameras. Senator segmented it over six weeks without breaking a thing. Auditor's PCI scope shrank from 'everything' to 'one VLAN with two terminals.'”
Who needs this.
- Any firm in PCI-DSS scope wanting to reduce scope (and audit cost).
- Manufacturing or healthcare with OT/IoT devices alongside corporate IT.
- Anyone planning to add IoT cameras, badge readers, or smart-building gear.
- Firms that have been hit by ransomware before — segmentation limits the next one's blast radius.
Q01Will this break my apps?
Will this break my apps?
Could, if done sloppily. Won't, if done with proper traffic discovery first. We spend a third of the project just understanding what currently talks to what.
Q02Do we need new hardware?
Do we need new hardware?
Often no — modern enterprise switches and firewalls already support VLANs and inter-VLAN routing. Sometimes a firewall upgrade is justified.
Q03How does this affect Wi-Fi?
How does this affect Wi-Fi?
Each SSID maps to its own VLAN. Production users, guests, BYOD, IoT — separate. Same APs, separate networks.
Q04What about hybrid or work-from-home?
What about hybrid or work-from-home?
Combine segmentation with zero-trust remote access — remote users only reach the segments they need, same as on-prem.
Free segmentation review.
We map your current network, identify the highest-risk flat areas, and propose a phased segmentation plan with cost and timeline.