What connection method is used between HULFT Square and external services?

Question

I understand that HULFT Square can connect to external services by using connectors.
What method is used in those connections (Internet/closed network, SIM, wired connection, etc.)?

Answer

Basically, the connection between HULFT Square and external services goes over the Internet.

As an exception, if the connection destination is on AWS, a closed connection via PrivateLink is possible.
*Some services may not be able to use PrivateLink.

For details on PrivateLink, please refer to the following manual page.
PrivateLink

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