About ChDF Ts Network Connectivity Test Server

Use Case

This server responds to certain requests in a very predictable way, which allows the requester to determine properties of their network connection based on the received response.

Some Operating Systems provide an API to configure a connectivity test server.

Available Types

HTTP Status
- 200: /status/200
- 204: /status/204
- 500: /status/500
Firefox Captive Portal Check
- Success (=Internet Access): /firefox/success.txt
- Fail (=Captive Portal Active): /firefox/captive.txt
Windows Network Connectivity Service Indicator (NCSI)
- Expected Value (=Internet Access): /windows/ncsi.txt
- Other Value (=Captive Portal Active): /windows/captive.txt

Client Setup

Keep in mind, that your device will regularly connect to this server when you use it as network connectivity check target.

Android: Network Service Settings Helper App
Firefox: Set captivedetect.canonicalURL to one of the Firefox files linked above.
Network Manager: Copy ncc.conf to /etc/NetworkManager/conf.d/ncc.conf and restart NetworkManager using # systemctl restart NetworkManager
Windows 7: Set the following values in the registry key HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\NlaSvc\Parameters\Internet. Set ActiveWebProbeHost to ncc.chdft.net.