diff --git a/frontend/src/components/network/nodes/deviceRegistry.ts b/frontend/src/components/network/nodes/deviceRegistry.ts
index c92dbbee..7dec611d 100644
--- a/frontend/src/components/network/nodes/deviceRegistry.ts
+++ b/frontend/src/components/network/nodes/deviceRegistry.ts
@@ -79,7 +79,7 @@ const CATEGORY_DEFAULTS: Record<string, DeviceRenderConfig> = {
   'cloud':          { icon: Cloud,       color: CLOUD_COLOR },
   'endpoint':       { icon: Monitor,     color: ENDPOINT_COLOR },
   'infrastructure': { icon: PlugZap,     color: INFRA_COLOR },
-  'security':       { icon: ShieldAlert, color: SECURITY_COLOR },
+  'security':       { icon: BrickWallFire, color: SECURITY_COLOR },
 }
 
 const FALLBACK: DeviceRenderConfig = { icon: Cpu, color: INFRA_COLOR }