diff --git a/device-types/Netgate/4100-Security-Gateway.yaml b/device-types/Netgate/4100-Security-Gateway.yaml
new file mode 100644
index 000000000..ea87a2776
--- /dev/null
+++ b/device-types/Netgate/4100-Security-Gateway.yaml
@@ -0,0 +1,44 @@
+---
+manufacturer: Netgate
+model: 4100 Security Gateway
+slug: netgate-4100-security-gateway
+u_height: 1
+weight: 1.9
+weight_unit: kg
+is_full_depth: false
+airflow: front-to-rear
+console-ports:
+  - name: console-usb
+    type: usb-micro-b
+    description: |
+      Auto-detect console port: use RJ-45 -OR- micro-USB.
+      115200 baud rate, 8 data bits, no parity, 1 stop bit, no flow control
+      or XON/OFF
+  - name: console-rj45
+    type: rj-45
+    description: |
+      Auto-detect console port: use RJ-45 -OR- micro-USB.
+      115200 baud rate, 8 data bits, no parity, 1 stop bit, no flow control
+      or XON/OFF
+power-ports:
+  - name: psu1
+    type: dc-terminal
+interfaces:
+  - name: ix3
+    type: 1000base-x-sfp
+    label: WAN1
+  - name: ix2
+    type: 1000base-x-sfp
+    label: WAN2
+  - name: igc0
+    type: 2.5gbase-t
+    label: LAN1
+  - name: igc1
+    type: 2.5gbase-t
+    label: LAN2
+  - name: igc2
+    type: 2.5gbase-t
+    label: LAN3
+  - name: igc3
+    type: 2.5gbase-t
+    label: LAN4