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Tools/Free firewall diagram maker

Free firewall diagram maker.

Draw a firewall diagram by describing the zones, firewall devices, systems, and allowed paths. Show the perimeter, DMZ, internal LAN, VPN connections, servers, and security monitoring points.

Network TopologyEnter to send

Free account, no card · Export SVG, PNG or PDF

See it work

Firewall diagram examples.

Same tool, four requests. Every drawing below is a real render.

What you type
A branch office network: a FortiGate 60F connects to the internet by VPN to headquarters, then to a core switch and access switch serving an admin PC, office printer, Wi-Fi access point, and entry camera on VLANs 10, 20, and 30.
Then tryAdd a guest Wi-Fi VLANAdd a file server on the core switch
Network topology: FortiGate branch office
Network topology · Cisco-convention topology icons · schematex-network

Rather start from a finished drawing? Browse 177 network diagram templates →

The drawing

What a firewall diagram is.

A firewall diagram shows the network zones a firewall separates and the systems on each side. It normally identifies the internet edge, DMZ, internal networks, VPN endpoints, and the servers or users that need access.

The important part is the boundary and the permitted path across it. Label links with protocols, ports, or purpose when that detail helps a security review or an operations handoff.

Standard
Cisco-convention topology icons
Also follows
Hierarchical / spine-leaf models · ANSI/TIA-606 · ONVIF
Engine
schematex-network
Editable
Double-click text, drag nodes
Export
SVG · PNG · PDF
Network topology: What a firewall diagram is
Who uses it

Who uses firewall diagrams.

Network topology: Network security teamsNetwork security teams

Review perimeter, DMZ, internal, and monitoring boundaries before changing firewall policy.

Network topology: Branch IT teamsBranch IT teams

Document a firewall, VLANs, remote VPN access, and the devices served at a small site.

Network topology: Auditors and reviewersAuditors and reviewers

See physical and logical boundaries, public-facing systems, and the internal network they protect.

How it works

How to make a firewall diagram in three steps.

01

Describe it

One paragraph is enough to start.

“A branch office network: a FortiGate 60F connects to the internet by VPN to headquarters, then to a core switch and access switch serving an admin PC, office printer, Wi-Fi access point, and entry camera on VLANs 10, 20, and 30.”
02

See the drawing

Drawn by the right engine.

Network topology: FortiGate branch office
03

Say what changes

Every edit keeps a version.

Add a guest Wi-Fi VLAN
V2 · DRAWN FROM V1, NOTHING RETYPED
FAQ

Common questions

What should a firewall diagram show?

Show firewall devices, the zones they separate, systems in each zone, and the traffic paths that cross those boundaries.

What is the difference between a perimeter and internal firewall?

A perimeter firewall filters traffic between the internet and an organization; an internal firewall separates networks within the organization.

How do I show firewall rules in a diagram?

Label a connection with its allowed protocol, port, or business purpose, and keep the arrow direction consistent with the flow.

Why include a DMZ?

A DMZ places public-facing systems in a separate zone so they do not sit directly on the internal network.

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Draw your firewall diagram now.

Free account, no card. Describe the zones, devices, and allowed paths.

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