> ## Documentation Index
> Fetch the complete documentation index at: https://docs.zeroruntime.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# IP Whitelisting

> Learn how to whitelist Zero Runtime's signaling and media IP addresses for secure inbound and outbound SIP calls.

IP whitelisting is a critical security measure for your SIP infrastructure. It involves configuring your SIP provider or network firewall to accept traffic only from trusted IP addresses. By explicitly allowing Zero Runtime's IP addresses, you ensure that:

1. **For Inbound Calls ( to Zero Runtime)**: You can restrict your firewall to only allow SIP signaling and media from Zero Runtime's servers, preventing unauthorized access or toll fraud attempts from malicious actors.
2. **For Outbound Calls ( from Zero Runtime)**: Many SIP providers (your carrier) require you to whitelist the source IP address of the calls (Zero Runtime's servers) to authenticate and authorize the traffic.

## Zero Runtime Signaling IPs

<Note>
  **`videosdk.live` is expected here.** Zero Runtime runs on VideoSDK's real-time infrastructure, so its SIP, media, and API endpoints are served from the `videosdk.live` domain. Whitelist the domains and IPs exactly as shown.
</Note>

You should whitelist the following domains and IP addresses for SIP Signaling.

**Ports to Allow:**

* **5060** (TCP / UDP)
* **5061** (TLS)

| Region                 | Domain                  | IP Address                            |
| :--------------------- | :---------------------- | :------------------------------------ |
| **IN1 Region (India)** | `in1.sip.videosdk.live` | `13.200.63.163`                       |
| **US2 Region (USA)**   | `us2.sip.videosdk.live` | `34.186.123.99`                       |
| **Global Routing**     | `sip.videosdk.live`     | *Routes to nearest IN1 or US2 region* |

<Info>
  The `sip.videosdk.live` domain is a global entry point that automatically routes traffic to the nearest available SIP server in either the IN1 or US2 region. Whitelisting both regional IPs ensures redundancy and optimal latency.
</Info>

## Zero Runtime Media IPs

For media exchange (Audio), you must whitelist the following domain.

| Type      | Domain                |
| :-------- | :-------------------- |
| **Media** | `media.videosdk.live` |