Captive Portal redirection

Zeihold_von_SSL · ‎10-16-2013

Hello everybody, I have a question and hope you can help me. I have set up a captive portal and everythings works fine like I planned it. But there is one issue I ran into, that I didn' t plan with. If the traffic which triggers the captive portal is https traffic, then we get a certificate warning. Let me explain this: 1) I join the captive portal based wlan 2) I open a browser and surf to https://www.google.com 3) I get a certificate warning in the webbrowser 4) If I ignore this warning I' am redirected to the captive portal 5) If I authenticate myself with correct credentials I will be redirected to the original website. The thing is, that I want to get rid of the certificate warning. I found this little config switch wich allows me to choose the certificate I want to use: config user setting set auth-cert xxx end I tried it with our official thawte certificate but that didn' t help. So I tried some other certificates (but this will only help our employees and not other guests) but this didn' t work either. And then I found this page: http://kb.fortinet.com/kb/microsites/search.do?cmd=displayKC&docType=kc&externalId=FD30760&sliceId=1&docTypeID=DT_KCARTICLE_1_1&dialogID=38506158&stateId=0 This was nearly the situation that I have. So I tried this setting, because this could be a win win situation (it could solve my problem and could help to increase the security level of my guest wlan). config user setting set auth-secure-http enable end Sadly, I now get redirected to the gateway IP and STILL get a certificate warning (cause there is no matching certificate which includes the gateway ip). So I' am stuck here. Cause I can' t use this setting: config firewall policy edit <my_policy_ID> set auth-redirect-addr " my.fortigate.com" next end This is because we use address based policies and no identity based policies. So I' am searching for another way to get rid of the certificate warning for _all_ users. Is there anyone who might help me?

Regards Rene ---

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flex10 · ‎07-06-2017

Here's the solution provided by FortiNet-Support, successfully tested on my FGT 500D with FortiOS 5.4.4:

- set a publicly trusted SSL-certificate under "User & Device" -> "Authentication Settings" which includes the common-name you wish to use (for example: captive.domain.com)

- create a public DNS-entry "captive.domain.com" which points to the internal IP of your captive portal.

- go to the CLI and enter the commands below:

# config firewall auth-portal

# set portal-addr captive.domain.com

# end

Now users will be redirected to https://captive.domain.com:1003 without any ssl-errors

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nero_kira · ‎01-18-2018

hello everyone i have a client who wants to add a video in the portal captive unsing fortipresence is it possible to do it thanks

ergotherego · ‎07-30-2018

Is there a way to have the captive portal page launch from a loopback interface?

Our situation is that we have a hub-and-spoke network, with regional based hubs and 50+ sites. Tunnels are IPSec from spoke to hub, so the actual IP addresses users get re-directed to varies depending on which site they are coming from, making it virtually impossible to account for all of the various VPN tunnel interface IPs on the hubs.

In my testing on 5.4.7 I cannot get the loopback interfaces to listen/respond on the captive portal services at all.