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how do I set up an inbound sip participant rule to allow any number but restrict connections from a certain subnet?

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To set up an inbound SIP participant rule that allows any number but restricts connections from a certain subnet, you can follow these steps:
1. Create an inbound trunk using the `CreateSIPInboundTrunk` API.
2. Configure the `allowed_addresses` parameter to specify which IP addresses or CIDR blocks are allowed to connect.
The `allowed_addresses` parameter accepts an array of strings, where each item can be either an individual IP address or a CIDR block notation. By specifying only the allowed subnets, you effectively restrict connections from other subnets.
For example, when creating your inbound trunk, include the `allowed_addresses` parameter with the IP ranges you want to allow, while implicitly blocking others.
 Sources: <https://docs.livekit.io/sip/api/|SIP APIs | LiveKit Docs>