1. Introduction to RADIUS and DaloRADIUS ................. 4 1.1 How RADIUS Works (Diagram) ........................ 6 1.2 DaloRADIUS vs Other Panels ........................ 9 2. Prerequisites and Lab Setup ........................... 12 3. Deep-Dive Installation (Ubuntu 22.04 Example) ......... 18 3.1 Database Optimization for 5k+ Users ............... 24 4. Post-Install Configuration ............................ 30 4.1 Enabling Simultaneous Use Protection ............... 33 5. User Management (With Screenshots) .................... 40 5.1 Batch Import using CSV ............................ 45 6. Billing and Prepaid Quotas ............................ 52 6.1 Real-time Accounting via DaloRADIUS API ............ 58 7. Integrating With Mikrotik Hotspot ..................... 64 8. Troubleshooting Matrix (Flowchart) .................... 71 9. Security Checklist (HTTPS, SQL Injection Prevention) ... 78 10. Appendix: SQL Schema Reference ....................... 83 11. Index ................................................ 88