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Guardian Air
Learn how Guardian Air extends visibility and protection across the wireless spectrum in your operational network.
Configuration
Information on how to configure Guardian Air.
Revert an NTP server configuration
Remove the previously configured network time protocol (NTP) server settings from a Guardian Air device. This procedure restores the default network configuration. It is useful when troubleshooting or preparing the device for a new network setup.

Guardian Air
Learn how Guardian Air extends visibility and protection across the wireless spectrum in your operational network.
- Introduction
  An overview of Guardian Air.
- Requirements
  The machine and network requirements necessary to use Guardian Air.
- Setup
  Information and resources on how to connect and install Guardian Air.
- Configuration
  Information on how to configure Guardian Air.
  - Configure an HTTP proxy
    Use a universal serial bus (USB) pendrive to manually configure hypertext transfer protocol (HTTP) proxy settings on a Guardian Air device. This setup enables network connectivity through a proxy when automatic configuration using the dynamic host configuration protocol (DHCP) is unavailable. Proxy details must be saved in a specific file format on the USB device.
  - Revert an HTTP proxy configuration
    Remove the previously configured hypertext transfer protocol (HTTP) proxy settings from a Guardian Air device. This procedure restores the default network configuration. It is useful for troubleshooting or reconfiguring the device for a different network environment.
  - Configure an NTP server
    Use a universal serial bus (USB) pendrive to manually configure a network time protocol (NTP) server on a Guardian Air device. This setup is useful when automatic configuration using the dynamic host configuration protocol (DHCP) is not available. The NTP server addresses must be specified in a configuration file saved on the USB device.
  - Revert an NTP server configuration
    Remove the previously configured network time protocol (NTP) server settings from a Guardian Air device. This procedure restores the default network configuration. It is useful when troubleshooting or preparing the device for a new network setup.
  - Configure a static IP address
    Use a universal serial bus (USB) pendrive to manually configure a static internet protocol (IP) address on a Guardian Air device. This approach is used when automatic configuration using the dynamic host configuration protocol (DHCP) is not available. The IP address, gateway, and domain name system (DNS) settings must be defined in a configuration file stored on the USB device.
  - Revert a static IP configuration
    Remove the previously configured static internet protocol (IP) address settings from a Guardian Air device. This procedure restores the device’s original network configuration. It is useful when troubleshooting connectivity issues or preparing the device for a new deployment.
- Cleaning
  The correct cleaning procedure.
- Troubleshooting
  Troubleshooting procedures to help you solve problems that might occur when you use Guardian Air.
- Print format documentation
  A list of all the print-format documentation that is available for Guardian Air.

Revert an NTP server configuration

Remove the previously configured network time protocol (NTP) server settings from a Guardian Air device. This procedure restores the default network configuration. It is useful when troubleshooting or preparing the device for a new network setup.

About this task

Do this procedure if you need to revert the Guardian Air device to its original network configuration. This is useful when changing network settings, troubleshooting connectivity issues, or removing previously configured network time protocol (NTP) server settings.

Procedure

Connect the universal serial bus (USB) pendrive you used to do the configuration to a desktop or laptop computer.

Note:
The operating system (OS) installed is not important.
Open the timesyncd.conf file.
Remove all the text from the file.
Save the timesyncd.conf file.
Safely eject the USB pendrive.
Make sure that the Guardian Air device is powered off. If it is on, disconnect the electrical power cable.
Connect the USB pendrive to one of the USB ports on the Guardian Air device.
To turn on electrical power to the Guardian Air device, connect the electrical power cable.
Wait until the status light-emitting diode (LED) indicator shows fixed yellow.
This should take less than one minute.

A fixed yellow light means that the Guardian Air original network configuration has been restored, and the system is unable to connect to the Nozomi Networks cloud service.
Safely eject the USB pendrive.

Results

After completing this procedure, the Guardian Air device reverts to its default network configuration. The NTP server settings are removed, and the device is unable to connect to the Nozomi Networks cloud service until new network settings are configured.