feat(radius): add RADIUS server with MAC authentication (MAB), VLAN assignment, accounting and OpsServer API handlers

readme.hints.md

@@ -1,5 +1,62 @@
 # Implementation Hints and Learnings
 
+## RADIUS Server Integration (2026-02-01)
+
+### Overview
+DcRouter now supports RADIUS server functionality for network authentication via `@push.rocks/smartradius`.
+
+### Key Features
+- **MAC Authentication Bypass (MAB)** - Authenticate network devices based on MAC address
+- **VLAN Assignment** - Assign VLANs based on MAC address or OUI patterns
+- **RADIUS Accounting** - Track sessions, data usage, and billing
+
+### Configuration Example
+```typescript
+const dcRouter = new DcRouter({
+  radiusConfig: {
+    authPort: 1812,      // Authentication port (default)
+    acctPort: 1813,      // Accounting port (default)
+    clients: [
+      {
+        name: 'switch-1',
+        ipRange: '192.168.1.0/24',
+        secret: 'shared-secret',
+        enabled: true
+      }
+    ],
+    vlanAssignment: {
+      defaultVlan: 100,   // VLAN for unknown MACs
+      allowUnknownMacs: true,
+      mappings: [
+        { mac: '00:11:22:33:44:55', vlan: 10, enabled: true },
+        { mac: '00:11:22', vlan: 20, enabled: true }  // OUI pattern
+      ]
+    },
+    accounting: {
+      enabled: true,
+      retentionDays: 30
+    }
+  }
+});
+```
+
+### Components
+- `RadiusServer` - Main server wrapping smartradius
+- `VlanManager` - MAC-to-VLAN mapping with OUI pattern support
+- `AccountingManager` - Session tracking and billing data
+
+### OpsServer API Endpoints
+- `getRadiusClients` / `setRadiusClient` / `removeRadiusClient` - Client management
+- `getVlanMappings` / `setVlanMapping` / `removeVlanMapping` - VLAN mappings
+- `testVlanAssignment` - Test what VLAN a MAC would get
+- `getRadiusSessions` / `disconnectRadiusSession` - Session management
+- `getRadiusStatistics` / `getRadiusAccountingSummary` - Statistics
+
+### Files
+- `ts/radius/` - RADIUS module
+- `ts/opsserver/handlers/radius.handler.ts` - OpsServer handler
+- `ts_interfaces/requests/radius.ts` - TypedRequest interfaces
+
 ## Test Fix: test.dcrouter.email.ts (2026-02-01)
 
 ### Issue