Page Comparison

Summary

Some Android-based devices are not redirected to the Captive Portal when the user gets connected to WiFi network with Android device. 

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1. The Android devices check for the following domains which are hosted on Akamai network:
   http://clients1.google.com/
   http://clients3.google.com/
   http://connectivitycheck.gstatic.com
   http://connectivitycheck.android.com
   and other domains used for this purpose by Google.
    
2. If the domain is accessible and returns “generate204” code, the captive portal is not triggered automatically. “generate204” response means the device is connected to the internet.

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# Android Internet Conectivity Test Domains
address=/clients1.google.com/a.b.c.d
address=/clients3.google.com/a.b.c.d
address=/connectivitycheck.android.com/a.b.c.d
address=/connectivitycheck.gstatic.com/a.b.c.d

Microsoft DNS

In the MS DNS Server Configuration (dnsmgmt.msc) go to Forward Lookup Zones create a new zone.

Enter the zone name identical to the test domain.

Configure the zone type and other properties according to your requirements and your MS DNS configuration.

Add a new static A entry with empty name and an inactive private IP, that cannot generate response 204.

Repeat the steps for each test domain.

clients1.google.com
clients3.google.com,a.b.c.d
connectivitycheck.android.com
connectivitycheck.gstatic.com