> For the complete documentation index, see [llms.txt](https://docs.mobiusflow.com/help/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.mobiusflow.com/help/technical-docs/mobiusflow-basics/ports-and-endpoints.md).

# Ports and Endpoints

The ports in used by Mobius Gateways. These are for services that can be hosted on the Gateway.

| Port  | Protocol     | L4 Protocol | Description                                      |
| ----- | ------------ | ----------- | ------------------------------------------------ |
| 80    | http         | TCP         |                                                  |
| 443   | https        | TCP         |                                                  |
| 502   | modbus       | TCP         | not enabled by default, only on physical gateway |
| 1883  | mqtt         | TCP         | not enabled by default                           |
| 4840  | opc-ua       | TCP         | not enabled by default, only on physical gateway |
| 8883  | mqtts        | TCP         | not enabled by default                           |
| 8443  | http / https | TCP         | Engine RESTful API                               |
| 30815 | mqtt         | TCP         | mobius sensor gateway                            |

The physical gateways fleet management and remote connectivity service require outbound access to these services 

| Port | Protocol | Description                                                                                                                                                                |
| ---- | -------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| 53   | UDP      | DNS: used by devices to resolve hostnames for connection to the  service                                                                                                   |
| 123  | UDP      | NTP: used by devices to synchronize time                                                                                                                                   |
| 443  | TCP      | <p>HTTPS: used by devices to poll for updates and to download application and host OS updates.<br><br>OpenVPN: used by devices to provide real-time status and control</p> |


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