WLC Web Auth Passthrough popup auto closes

[irissen]

Hi All,

I've had this issue where using web-auth with passthrough with a redirect to URL. After the Accept button, the popup window to the redirected page appears, but closes itself immediately afterwards with SSID successfully logged in. However I need that page to stay on (welcome page). Happens on most phones, but not PCs.

I have 2 WLCs, this issue occurs only on WLC2 and not WLC1. Could anyone point me which configuration might be the cause?

Thank you very much.

[marce1000]

           - What is the model of the involved WLC's and what software version(s) are they running ?

 M.

[irissen]

Oops sorry..

They are both Cisco CT8540 with 8.2.151.0

[Scott Fella]

If it happens on one and not the other, there must be a service hung on that controller.  Have you tried to reboot the controller?  You can always create a backup of the config and use a tool to run a diff between the two and see if there is any config missing or there that shouldn't be.  

[marce1000]

                                                    >They are both Cisco CT8540 with 8.2.151.0
      Advising to upgrade to     https://software.cisco.com/download/home/286284728/type/280926587/release/8.10.183.0  ,
  note that aireos is  getting old, also look at https://www.cisco.com/c/en/us/support/docs/wireless/wireless-lan-controller-software/200046-tac-recommended-aireos.html , on the problematic controller(s) have the configuration analyzed with show run-config commands  , have the output analyzed with https://cway.cisco.com/wireless-config-analyzer

 M.

[irissen]

Thanks for the replies, but sorry guys, we'd tried to switch back to WLC2 and its also like that now. We had rebooted both.

I don't assume this is the normal behaviour though? Or what config is needed to make the redirect page stay on?

[Scott Fella]

Good to know.  My assumption was that one controller worked and the other didn't.  That usually points to an issue with the one that doesn't work.  At least you tested the other and discovered that it happens to both.  Best way to troubleshoot controller issues.  Glad you figured it out.

[irissen · Accepted solution]

Hi All, I've found the issue. Not Cisco WLC related.. but I wish it was explained better.

Basically the Web-Auth Passthrough on newer phones will prompt the mini-browser, instead of the usual full-fledged browser. Upon detecting Internet access, this mini browser closes.

https://community.cisco.com/t5/wireless/redirect-url-after-authentication-with-psk-wlc-5508-8-0-140-0/td-p/3323176

https://medium.com/@gbinrete/demistyfy-wi-fi-3b821cd72670

[Rich R]

Yes that's completely normal captive portal assistant behaviour for most modern devices.

The difference with PCs (at least Windows) is that they open the captive portal in a regular browser tab (eg MS Edge) which means it remains open after the user has logged in.