Wireless Controller
Dedicated Wi-Fi control and management for high density and mobility
nmichael
Staff
Staff
Article Id 191128

Description

Captive portal issue with Android OS devices with version 2.1


Scope
KB ARTICLE TYPE: Troubleshooting
RELATED PRODUCTS: Controller/IDM
RELATED SOFTWARE VERSIONS: 5.1-xx
KEYWORDS: Web Authentication, Android, DNS, Host name.

Solution
Android OS Known Issue:  Reference: http://code.google.com/p/android/issues/detail?id=8030

Took wireless captures and found android devices were not sending the DNS query for the complete FQDN instead they are sending the DNS query for just the host name for which the DNS server is sending a response with Server Failure since there is no entry for the hostname in the DNS server.

The Above Issue happens if you have the controller host name in the place of Common name while creating the pending CSR. Other Operating systems are sending the DNS query to the FQDN fine.

The issue is suspected to be a BUG in some Android devices which is not reading the option 15 and option 119 in the DHCP packet which for the Domain name search.

Workaround for this Issue is to delete the installed server certificate and enter the FQDN instead of Controller host-name in the Common Name field when creating the new pending CSR.




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