diff --git a/static/faq.html b/static/faq.html index 045b46cb..2b5d4b2c 100644 --- a/static/faq.html +++ b/static/faq.html @@ -487,39 +487,18 @@ are designed to detect and handle captive portals which substitute the expected empty 204 response with their own web page.

-

By default, GrapheneOS leaves these set to the standard four URLs to blend - into the crowd of billions of other Android devices with and without Google - Mobile Services performing the same empty GET requests. For privacy reasons, - it isn't desirable to stand out from the crowd and changing these URLs or even - disabling the feature will likely reduce your privacy by giving your device a - more unique fingerprint. GrapheneOS aims to appear like any other common - mobile device on the network.

- -

These need use a very common domain and URL in order to bypass whitelisting - systems only permitting access to common domains / URLs so you may experience - issues if you choose to use connectivitycheck.grapheneos.org instead of the - standard URLs.

+

The connectivity checks are done by performing an empty GET request to a + server returning an empty response with a 204 No Content response code. The + request a standard, frozen value for the user agent and doesn't send any data + to the server.

Standard frozen AOSP user agent for the GET request:

Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.32 Safari/537.36

No query / data is sent to the servers and the response is unused beyond checking the response code.

-

Standard URLs used by Android and when blending in with other devices on - GrapheneOS:

- - - -

We have our own connectivity check server as an alternative to using the - standard URLs. The next release of GrapheneOS will use this by default with a - configuration option in the Settings app to toggle between the GrapheneOS - servers and the standard servers in order to preserve the option of blending - in with the crowd of billions of other Android devices.

+

By default, the GrapheneOS connectivity check server is used via the + following URLs:

-

Similar connectivity checks are also performed by Vanadium. Configuration - will need to be extended to these, likely by reusing the OS configuration - instead of it being separate.

+

You can change the connectivity check URLs via the Settings ➔ Network & + internet ➔ Advanced ➔ Internet connectivity check setting. At the moment, it + can be toggled between the GrapheneOS server and the standard Google servers + used by billions of other Android devices. This can be used to blend in with + other Android devices, both with and without Play services. Changing this to + the Standard (Google) mode will use the same URLs used by AOSP and the stock + OS along with the vast majority of other devices:

+ + + +

Similar connectivity checks are also performed by Vanadium. We plan to make + it respect the OS configuration option added by GrapheneOS.

  • DNS connectivity and functionality tests