ERR_NETWORK_ACCESS_DENIED
ERR_NETWORK_ACCESS_DENIED Error
What This Error Means
The ERR_NETWORK_ACCESS_DENIED error indicates that the browser was blocked from accessing the network entirely. Unlike a firewall blocking a specific site, this error usually means the browser application itself does not have permission to use the network interface, often due to local security policies or sandbox restrictions.
Common Causes
- A local firewall (like Windows Defender or third-party antivirus) explicitly blocking the browser executable.
- Parental control software restricting internet access for the application.
- Running the browser in a restricted sandbox environment without network privileges.
- Corrupted firewall rules on the operating system.
- VPN software locking the network interface (Kill Switch) when the connection drops.
How to Fix It (For Users)
- 1 Check your firewall settings and ensure your browser is on the allowed list.
- 2 Disable any active VPN 'Kill Switch' features if you are disconnected.
- 3 Temporarily turn off antivirus software to test connectivity.
- 4 Reset your firewall settings to default.
- 5 Run the browser as Administrator to see if it's a permission issue.
For Site Owners / Developers
- This is strictly a client-side configuration issue.
- You cannot fix this from the server side.
When It Is NOT Your Fault
If your corporate network administrator has applied a policy blocking the browser.
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