Access this feature from: Protection ▸ Wi-Fi Inspector
Wi-Fi Inspector scans your network for vulnerabilities and identifies potential security issues that open the door to threats. This feature checks the status of your network, devices connected to the network, and router settings. Wi-Fi Inspector helps you secure your network to prevent attackers from accessing it and misusing your personal data.
Note: Wi-Fi Inspector is enabled by default, however, you need to perform network scans manually. This feature does not provide real-time protection.
Scan your network
Wi-Fi Inspector offers two levels of scans, which differ in sensitivity, detections, and solutions for vulnerabilities:
- Home: performs a comprehensive network scan that uses increased sensitivity to check your router and all connected devices for vulnerabilities, and verifies your network status. Depending on the number of connected devices, it can be a time-consuming scan and not recommended for use on a public network.
- Public: performs a simple network scan that ensures your device is secure while connected to a public network.
During the scan, you can minimize Avast Antivirus or navigate to other Avast screens. You can also click the Stop Scan button at any time to end the scan early.
Select your view
You can customize the view of devices and routers while the scan is running:
- Map view: displays the spatial layout of devices as they are discovered and scanned. After a device is scanned, click the relevant icon to see device information.
- List view: displays the itemized list of devices as they are discovered and scanned. After a device is scanned, click the relevant panel to see device information.
Analyze scan results
If a scan detects an issue, click the relevant notification type for your preferred view:
- Map view: When a vulnerability is detected, the affected device/router is marked with a red exlamation point. Click on the device icon to Open details and see the vulnerability.
- List view: When a vulnerability is detected, the affected device/router panel is marked with a red explamation point. Click the status Your device is not configured correctly to see the vulnerability.
Wi-Fi Inspector exposes the following vulnerabilities:
- Weak or default passwords (for Wi-Fi and router administration)
- Router firmware vulnerabilities (for most common vendors)
- Non-encrypted, unsecured wireless networks
- DNS hijacking (on devices and routers)
- Open network ports (for remote access, Telnet, etc.)
- Botnet presence
Note: Wi-Fi Inspector does not have permission to access and modify router settings on your behalf, which means that the scan itself is not able to fix network issues for you. All changes on the router administration page need to be manually performed by you or your router vendor. Basic instructions for the most common routers are displayed on the alert screen. For more information, refer to your router’s documentation, support pages, or contact the vendor directly.
Check device and router details
Click the relevant device icon in Map view to see the device information and scan results. The scan results screen in List view includes the following panels:
- Your device
- Discovered devices (not applicable for Public scan where only your device and the router are scanned)
Each panel displays the device name, host name, and security status. Click the panel of any device/router to check the following information:
- Details: shows device IP and the MAC address, Vendor, Model, Name, Operating System, and DNS.
- Interfaces: shows the MAC address of the network interface.
- Services: shows information about any running services and related network ports.
Improve network security
To improve your network security and prevent network attacks, follow these basic recommendations:
- Open your router settings page and do the following:
- Ensure that the SSID (or Wireless Network Name) has a unique name.
- Change the default admin username and password for your router.
- Turn on WPA2 encryption.
- Upgrade your router firmware.
- Disable any remote access services.
- Ensure that only trusted devices are connected to your network.
- Run Wi-Fi Inspector often to catch vulnerabilities early.
If Wi-Fi Inspector displays incorrect or inconsistent data, please ensure all VPN services are disabled on your device when you start scanning. If you experience any router configuration issues, contact the relevant router vendor or refer to the product’s documentation and support pages.
Wi-Fi Inspector is enabled by default. To uninstall it, select ☰ Menu ▸ Settings ▸ Components on the main screen of the Avast Antivirus. Click the panel for Wi-Fi Inspector to expand the section, then click Uninstall Component.