Popup page without internet connection using coova-chilli

Question

I am using openwrt and coovachilli for registration purpose, when there is presence of internet connection to router then chilli starts and popup page appears after connect to WiFi.
But I want popup page without presence of internet. Router should popup after connect to WiFi using coovachilli without internet. Please help me out in this situation.
Thanks in advance.

OpenWrt Version:- 15.05
CoovaChilli Version:- 1.3.0

Answer 1

It's not possible technically due to the way Coova Chilli (and other hotspot software systems) works.

Without Internet connection, your DNS server will return failures so no DNS query will work. Without DNS queries (and IP addresses as result), there won't be a HTTP request for Coova to hijack. Your device (eg. iPhone) won't even trigger a CNA window

There are possibilities (workarounds) of course - eg. make your DNS resolver (dnsmasq?) resolve to some dummy/hardcoded IP address while the connection is down. You would have to write a script yourself that detects connection and swaps configs

Answer 2

It is possible with a workaround.

You have to use a local UAM server (on the same host or LAN) and authenticate with local users file or local RADIUS server. For using local users file, without RADIUS server, you must specify a dummy RADIUS server IP:

radiusserver1 127.0.0.1
localusers /etc/chilli/localusers

Then, you can add a dummyuser:dummypass to your localusers file and use it for the authentication as usual:

http://${uam_ip}:${uam_port}/logon?username=dummyuser&password=${chap_password}