| Source address | Ports | Protocols | Description |
|---|---|---|---|
| enline Controller | 80 + 443 | HTTP+S | Internet connection |
| enline Controller | 8883 | MQTTS | Cloud connection |
| enline Controller | 25 + 465 TCP | SMTP+S | |
| enline Controller | 123 UDP | NTP | Time synchronization |
| enline Controller | 53 TCP + UDP | DNS | Name resolution |