Network segmentation Separate zones, with explicit rules between them.
Short answer. Network segmentation splits a network into separate zones and allows only the traffic each zone needs. The UK NCSC explains that it greatly increases the difficulty for an attacker to reach their goal once inside, because the point of entry may have no route to the target data or system. In a small office, staff laptops, guest Wi-Fi, cameras, printers, the file server and an AI box each sit in their own zone, with explicit rules between them. Segmentation also narrows monitoring: the NCSC notes that it lets you focus on the traffic flowing between segments.
01
Zones for a typical office
This layout is an example. Adjust it to your equipment.
Zone
Contains
Rule of thumb
Staff
Laptops and phones of employees
May reach the AI box and file server on the ports they need, and nothing in management
Servers
File server, accounts system, the AI box
Accepts connections only from staff and management; calls out only to approved destinations
Guest
Visitors’ phones and laptops
Internet only, with no route to staff or servers
Cameras and devices
CCTV, printers, smart TVs, door controllers
No route to staff or servers; cameras talk only to their recorder
Management
Administrator laptops, switches, the firewall console
Reached only from administrator devices
02
How to build it
The NCSC’s advice is to segregate networks as sets: identify, group and isolate critical business systems, and apply appropriate network security controls to them. Systems and data that do not need to talk to each other should sit in different segments, and users should be able to reach only the segment they need.
In practice this means network equipment that can separate traffic into zones, usually with VLANs, and a firewall that enforces the rules between them. NIST’s firewall guide says to block all inbound and outbound traffic that has not been expressly permitted, which it calls deny by default. Start with the rules between zones, then tighten. Add host firewalls too: the NCSC recommends local firewalls on hosts to restrict unnecessary inbound and outbound traffic.
03
Placing an AI box
Put it in the servers zone, not on the same flat network as guests and cameras.
Allow inbound connections only from the staff zone, on the ports the AI apps use, and from management.
Allow outbound connections only to destinations you have approved: software and operating system update sources, and any cloud model or lookup service you have switched on.
Block all inbound connections from the internet.
Keep the management interface on the management zone only.
Log traffic at the boundary, so you can see what crossed.
04
Common mistakes
A flat network with a firewall only at the edge. The NCSC warns that networks with strong boundary protection but no internal security give attackers free rein once they are in.
Any-to-any rules between zones, which make the zones decorative.
Guest Wi-Fi bridged to the staff network.
Forgetting devices that cannot be patched, such as cameras and printers. They belong in their own zone.
Never testing. Try to reach the AI box from the guest network and from a camera port, and confirm that you cannot.
05
Where ANVE stands
ANVE is a device on the office network. Which zone it belongs in, and which outbound destinations it needs, depend on the optional paths you switch on: cloud models, research lookups, connectors and podcast narration. Every model call is logged with whether it ran locally or in the cloud, which helps you check the outbound rules against what actually happens. ANVE’s security page (/security) says the sealed unit, now in design, adds a physical switch with a light that cuts the network.
06
Questions people ask
Is segmentation the same as a firewall?
No. A firewall enforces rules about traffic. Segmentation is the design that decides which zones exist and which traffic may pass between them. A firewall is usually the tool that enforces it.
Do small offices need segmentation?
At a minimum, separate guests from staff, and cameras and printers from both. The effort is small and it removes the easiest routes for an intruder.
What is micro-segmentation?
Segmentation down to individual hosts or workloads. NIST’s zero trust publication describes a zero trust architecture using micro-segmentation as one of its deployment approaches.
Will segmentation break the AI app for staff?
Not if the staff zone is allowed to reach the AI server on the right port. Test with an ordinary staff laptop after any change.
07
What is not real yet
No sealed ANVE unit exists; every image of the appliance on this site is a labelled render. The software runs today on a development machine. No customers yet, no certifications, no delivery date, and the final price is not announced.
Reservations are ₹999 in India or US$12 elsewhere, refundable in full until you confirm an order in writing (terms). Offices that cannot use cloud AI can apply to be one of ten design partners.
