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tva79
tva79
New Member
October 22, 2018
Solved

Captive portal attached to an interface but after authentication browser go loop

  • October 22, 2018
  • 1 reply
  • 37899 views

Hi all,

 I have attached a Captive Portal to my lan interface with a local group authentication.

 

From a pc client, when I open the browser for digit any website, the Fortinet login appear (correct)

 

I insert my username and password (correct)

 

Fortigate accept my credentials because I can see my user from "Monitor" -> "Firewall User Monitor" (correct)

 

the problem is now because in address bar of the browser, I can see a continuous loop of the address:

 

http://172.16.0.X/fgtauth?092321232323cdw2

http://172.16.0.X/fgtauth?021372123435ed82

http://172.16.0.X/fgtauth?010032723341c889

http://172.16.0.X/fgtauth?0933423487fd0fc44

 

and the website that I asked don't open.

 

Also if I open another tab in Chrome, I can see the same loop with the magic token that change continually.

 

Can I solve or debug this big problem?

 

I haven't found any documentation about diagnostic of Captive Portal feature.

 

thanks!

Andrea

 

 

 

 

 

 

 

    Best answer by thende

    Hi guys.

     

    I've fixed it with the following:

     

    config user setting set auth-src-mac disable end

     

    I think that by default Fortigate will also check on the mac address of the client trying to authenticate and if the client is behind a router before reaching the firewall the loop is the behavior we'll see. That setting above disables it.

    1 reply

    garylau
    garylau
    New Member
    December 3, 2018

    After upgraded to FortiOSv6.0 also face your problem.

    My environment is Notebook>Wifi AP>FW

    User after login success in (IE,Chrome,Firefox), the number at end of link path change continuous.

    [link]http://172.16.0.X/fgtauth?[/link]040b0181b0ea850a

    [link]http://172.16.0.X/fgtauth?[/link]xxxxxxxxxxxxxxxxx

    Is there any changed in FortiOSv6.0? or bugs?

      TuncayBAS
      TuncayBAS
      Explorer
      December 13, 2018

      maybe bug.

       

      update to 6.0.3

        garylau
        garylau
        New Member
        December 14, 2018

        Thanks~

        But already in FortiOS v6.0.3

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