> For the complete documentation index, see [llms.txt](https://developer.rategain.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developer.rategain.com/content/content-update-1/interface-requirements.md).

# Interface requirements

**Connectivity options**

The following connectivity options are available to clients of the HCD XML Update Interface.

| **Connection Type**                              | **Hardware Requirements**  | **Encryption** | **Other Requirements**                                                                                                                                                    |
| ------------------------------------------------ | -------------------------- | -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| <p>HTTP</p><p>(unsecured)</p>                    | None                       | None           | <p>Connection to the Internet. Not</p><p>recommended if sensitive information is to be transmitted. Unsecured HTTP is only available in non- production environments.</p> |
| <p>Client SSL</p><p>(Internet based / HTTPS)</p> | None                       | Software Based | SSL toolkit, RSA cipher license, connection to the Internet                                                                                                               |
| <p>VPN</p><p>(Internet based)</p>                | IPSEC capable device       | Hardware Based | Connection to the Internet                                                                                                                                                |
| <p>Frame Relay</p><p>(Dedicated line)</p>        | Frame-relay capable router | Not Required   | None                                                                                                                                                                      |


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