# Zoom video sdk implementation is not working in computers with firewall

**URL:** <https://devforum.zoom.us/t/zoom-video-sdk-implementation-is-not-working-in-computers-with-firewall/137807>\
**Category:** Video SDK\
**Tags:** video-sdk\
**Created:** [October 2, 2025, 5:54pm UTC](https://devforum.zoom.us/t/zoom-video-sdk-implementation-is-not-working-in-computers-with-firewall/137807 "2025-10-02T17:54:58Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![Tarun1](https://avatars.discourse-cdn.com/v4/letter/t/8baadc/32.png) [@Tarun1](https://devforum.zoom.us/u/Tarun1)\
**Post date:** [October 2, 2025, 5:54pm UTC](https://devforum.zoom.us/t/zoom-video-sdk-implementation-is-not-working-in-computers-with-firewall/137807/1 "2025-10-02T17:54:58Z")

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# Video SDK WebRTC Failure in Restrictive Network Environments (Prison Facilities)

## Video SDK Type and Version

- **Package:** `@zoom/videosdk`

- **Version:** `^2.2.5`

- **Platform:** Web (React application)

## Description

The Zoom Video SDK fails to initialize in highly restrictive network environments, specifically within prison/correctional facility networks where WebRTC connections are blocked by firewalls. The SDK crashes with the following error:

### Error Message

```auto
VM5:952 Uncaught TypeError: Cannot destructure property 'shouldUseWebRTC' of 'Pi.getWebRTCCapability(...)' as it is undefined.
    at index-C42V1Njq.js:2303:87776
    at index-C42V1Njq.js:2212:20330
    at c._next (index-C42V1Njq.js:2212:5478)
    ...

```

### Root Cause

The SDK attempts to call `getWebRTCCapability()` which returns `undefined` when WebRTC is blocked by the network firewall, causing the application to crash during initialization. The SDK does not gracefully handle environments where WebRTC is unavailable.

## Environment Details

- **Network:** Facility with strict firewall rules

- **Browser:** Chrome/Edge (latest versions)

- **Camera/Microphone:** Not being triggered at all due to SDK crash before media device access

## How To Reproduce

### Steps:

1. **Authentication method:** JWT token-based authentication

2. **Network simulation:** Test on a network that blocks:

3. **Initialization code:**

```auto
import ZoomVideo from '@zoom/videosdk';

const client = ZoomVideo.createClient();

// This crashes when WebRTC is blocked
await client.init("en-US", "CDN", {
  patchJsMedia: true,
  enforceMultipleVideos: true,
});

// Attempt to join session
await client.join(sessionName, token, userName);

```

1. **Error occurs:** During `client.init()` when SDK tries to detect WebRTC capabilities

### Browser Console Behavior:

- No camera/microphone permission prompts appear

- SDK crashes before reaching media device initialization

- `getWebRTCCapability()` returns `undefined`

- Application becomes unresponsive

## Troubleshooting Routes Already Exhausted

### 2. **Implemented Workarounds (Attempted)**

```auto
// Added WebSocket endpoint configuration
await client.init("en-US", "CDN", {
  patchJsMedia: true,
  enforceMultipleVideos: true,
  webEndpoint: "zoom.us", // Added for WebSocket fallback
});

// Added capability detection with error handling
let webRTCCapability = null;
try {
  webRTCCapability = client.checkSystemRequirements();
  console.log("WebRTC Capability:", webRTCCapability);
} catch (error) {
  console.warn("Could not check WebRTC capability:", error);
  // SDK still crashes even with try-catch
}

```

### 4. **Browser Configuration**

- Tested on multiple browsers (Chrome, Edge)

- Verified browser supports WebSocket (works fine)

- Issue persists across all browsers in restrictive networks

## Actual Behavior

The SDK:

1. Crashes with `TypeError` when `getWebRTCCapability()` returns `undefined`

2. Does not provide a WebSocket fallback option

3. Completely halts application execution

4. Does not reach media device access (camera/mic never triggered)

5. When checked in network tab:

## Questions for Zoom Team

1. **Are there plans** to add graceful degradation for restrictive networks?

2. **What is the recommended approach** for deploying Video SDK in firewall-restricted environments?

## Request

Please provide:

1. SDK update to handle `getWebRTCCapability()` returning `undefined`

2. Documentation for deploying in restrictive network environments

3. Timeline for fix if this is a known limitation

---

<div class="post-metadata">

**Author:** ![vic.yang](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/vic.yang/32/24656_2.png) [@vic.yang](https://devforum.zoom.us/u/vic.yang)\
**Post date:** [October 9, 2025, 7:21am UTC](https://devforum.zoom.us/t/zoom-video-sdk-implementation-is-not-working-in-computers-with-firewall/137807/2 "2025-10-09T07:21:21Z")

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Hey @Tarun1

Thanks for your feedback.

Could you help share some problematic session IDs with us for troubleshooting purposes?

Thanks  
Vic

---

<div class="post-metadata">

**Author:** ![Tarun1](https://avatars.discourse-cdn.com/v4/letter/t/8baadc/32.png) [@Tarun1](https://devforum.zoom.us/u/Tarun1)\
**Post date:** [October 9, 2025, 2:00pm UTC](https://devforum.zoom.us/t/zoom-video-sdk-implementation-is-not-working-in-computers-with-firewall/137807/3 "2025-10-09T14:00:46Z")

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Sure, Thanks for the reply!

sessionID: THERAEBK050935

Also, attaching the console error image:

https ://ibb.co/kgDLdF9N

---

<div class="post-metadata">

**Author:** ![vic.yang](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/vic.yang/32/24656_2.png) [@vic.yang](https://devforum.zoom.us/u/vic.yang)\
**Post date:** [October 10, 2025, 12:58am UTC](https://devforum.zoom.us/t/zoom-video-sdk-implementation-is-not-working-in-computers-with-firewall/137807/4 "2025-10-10T00:58:43Z")

</div>

Hi @Tarun1

> sessionID: THERAEBK050935

It seems that this is not a valid session ID. You can retrieve it from the web portal under **Dashboard → Past Sessions** if the session has ended, or get it using the `client.getSessionInfo().sessionId` method if you are currently in a session.

Thanks  
Vic