Troubleshoot Network Proxy Issues

This page covers common issues and solutions when working with a Network Proxy tool. If you don't find a solution to your specific problem here, post an issue in the Developer Forum for additional support.

Network traffic stops logging

Cause: Blocked proxy ports, Visual Studio Code (VS Code) or Network Proxy requires a restart, port conflicts exist, or there are issues with port forwarding and device network connections.

Solution:

1. Check if the proxy port is open and not blocked by firewalls.
2. Restart VS Code and Network Proxy.

3. Open the command palette:

   Mac: shift + command ⌘ + p

   Linux: Ctrl + Shift + P

4. Enter Reload Window.
5. Try using a different port number as there could be a port conflict.
6. Verify the port forwarding setup and device network connection.

HTTPS traffic isn't logged

Cause: SSL option remains disabled, SSL certificate issues occur, or proxy configuration is incorrect.

Solution:

1. Enable SSL option in Settings > Enable SSL.
2. Check that the system automatically generates the SSL certificate in assets/raw folder.
3. Check SSL certificate installation status.

4. Make sure you have a correct proxy configuration in proxy-config.json file.

   Sample configuration:

   Copy code Copied to clipboard.

    {
       "enableSSLProxying": true,
       "caBundleFile": "raw/ca.pem",
       "host": "10.0.2.2",
       "port": 5667,
       "enableCallStack": true
    }
   

Debug session conflict

Cause: React Native supports one debugging session at a time. A conflict occurs when an active debugging session exists and the Capture Call Stack option remains enabled.

Solution: You have two options to resolve this conflict:

Option 1: Check and stop any active debugging session:

1. Start Network Proxy.

   a. In VS Code, press Cmd+Shift+P (macOS) or Ctrl+Shift+P (Linux) to open the command palette.

   b. Enter "Network Proxy" and select "Vega: Start Network Proxy".

   c. Wait for the Network Proxy to initialize.

2. Check if there's an active debugging session in VS Code.

   a. If there is an active session, you see the debug controls with an active stop button (red square).

   b. If there isn't an active session, proceed to step 4.

3. If a session is active, click the stop debugging button to end it.

   

4. Build, install, and launch the app.

Option 2: Disable Capture Call Stack in Network Proxy

1. Go to Setup Network Proxy setting.

   a. In VS Code, press Cmd+Shift+P (macOS) or Ctrl+Shift+P (Linux) to open the command palette.

   b. Enter "Network Proxy" and select "Vega: Setup Network Proxy".

2. In the Network Proxy settings window, leave the Capture Call Stack option blank. If the option shows a checkmark, uncheck the box.

   

3. Build, install, and launch the app.

Related topics

• Monitor Traffic with Network Proxy
• Monitor Network Traffic with Charles Proxy

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Last updated: Nov 14, 2025