Set up TLS (or SSL) inspection on Chrome devices

1) Set up a hostname allowlist

For Chrome devices to work on a domain with TLS inspection (also known as SSL inspection), some hostnames need to be exempt from inspection. This is because certificates can only be imported at the user level and are only honored for user-level traffic. Some device-level traffic doesn’t use the TLS or SSL certificate to protect users against certain kinds of security risks.

To ensure that Chrome devices work with TLS inspection or networks restricting external traffic, you need to allow the following hostnames on your proxy server. For details on how to allow hostnames, check with your web filter provider.


  • December 16, 2019: Added to return Google Drive results when searching from the Chrome address bar
  • June 25, 2019: Changed * to * and added *
  • September 25, 2018: Added 
  • July 20, 2018: Added *
  • March 15, 2018: Added
  • December 22, 2017: Added alt*
  • July 13, 2017: Added[country]
  • March 1, 2017: Added hostname to allowlist for Chrome devices using Android apps
  • January 19, 2017: Removed
  • September 28, 2016: Added
  • December 2, 2015: Added hostnames to allowlist for single-app kiosk devices
  • August 5, 2015: Added
  • March 3, 2020: Added additional hostnames to allowlist for Google Play
  • August 11, 2020: Added additional hostname to allowlist for all Chrome devices

Hostname allowlist for all Chrome devices


​1 For more information, see What is

2 For[country], use your local top-level domain for [country]. For example, for Australia use, and for United Kingdom use

3 If you're running Chrome OS version 62 and you're seeing the error "Network not available," you may need to allow the host alt* through your firewall on port 80. If this doesn't resolve the issue, see this full list of hosts to allow.

Additional hosts to allow

You need to allow the additional hostnames for TLS inspection to work correctly if you're using:

  • Chrome extensions or apps from the Chrome Web Store on Chrome devices, including single-app kiosk devices.
  • Android apps from the Google Play Store on Chrome devices

Hostname allowlist for Chrome devices using Chrome extensions and apps (Chrome Web Store)

If you use Chrome extensions and apps on Chrome devices (Chrome Web Store), including single-app kiosk devices, allow the following hostnames in addition to the hostnames listed above:

Hostname allowlist for Chrome devices using Android apps (Google Play Store)

If you use Android apps on Chrome devices (Google Play Store), allow the following hostname in addition to the hostnames listed above under Hostname allowlist for all Chrome devices.

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