Captiv portal and vouchers integration with ssid on wlc 9800

johnpoz

@Jozy proper version of what? Open the captive portal in your browser from where.. There is redirection that happens as well.. Not sure you can just the captive portal without the redirection

[24.03-RELEASE][admin@sg4860.home.arpa]/root: cat /tmp/rules.debug | grep cpzoneid
table <cpzoneid_2_cpips> { 192.168.200.1}
ether pass on { igb3.10  } tag "cpzoneid_2_rdr"
ether anchor "cpzoneid_2_auth/*" on { igb3.10  }
ether anchor "cpzoneid_2_passthrumac/*" on { igb3.10  }
ether anchor "cpzoneid_2_allowedhosts/*" on { igb3.10  }
rdr on igb3.10 inet proto tcp from any to ! <cpzoneid_2_cpips> port 80 tagged cpzoneid_2_rdr -> 192.168.200.1 port 8002
pass in quick on igb3.10 proto tcp from any to <cpzoneid_2_cpips> port 8002 ridentifier 13001 keep state(sloppy)
block in quick on igb3.10 from any to ! <cpzoneid_2_cpips> ! tagged cpzoneid_2_auth ridentifier 13003
[24.03-RELEASE][admin@sg4860.home.arpa]/root:

And there is some etherules as well that are going to happen.

If your on the network you have the captive portal on and you try and hit something on port 80, ie normal http you should be redirected to the captive portal.. I really don't feel like changing my network around to show some pictures of something that is so basic..

When I turn it on my guest network, its kicking my work laptop off the work vpn.. If I get a chance do some stuff so I can play with it without disrupting my normal flow. Could prob fire up another ssid and connect to that with my main pcs wifi card so not to mess with my normal access on my pc or my work laptop.

Jozy

@johnpoz
Please can you check below output, U really dont know what the problem could be...
[2.7.2-RELEASE][admin@pfSense.home.arpa]/root: netstat -anl
Active Internet connections (including servers)
Proto Recv-Q Send-Q Local Address Foreign Address (state)
tcp4 0 96 10.223.110.155.22 10.223.100.28.51652 ESTABLISHED
tcp6 0 0 *.8002 . LISTEN

[2.7.2-RELEASE][admin@pfSense.home.arpa]/root: cat /tmp/rules.debug | grep cpzoneid
table <cpzoneid_2_cpips> { 10.223.100.180}
ether pass on { vmx2 } tag "cpzoneid_2_rdr"
ether anchor "cpzoneid_2_auth/" on { vmx2 }
ether anchor "cpzoneid_2_passthrumac/" on { vmx2 }
ether anchor "cpzoneid_2_allowedhosts/*" on { vmx2 }
rdr on vmx2 inet proto tcp from any to ! <cpzoneid_2_cpips> port 80 tagged cpzoneid_2_rdr -> 10.223.100.180 port 8002
pass in quick on vmx2 proto tcp from any to <cpzoneid_2_cpips> port 8002 ridentifier 13001 keep state(sloppy)
block in quick on vmx2 from any to ! <cpzoneid_2_cpips> ! tagged cpzoneid_2_auth ridentifier 13003

johnpoz

@Jozy notice the port 8000, where is that coming from?

like I said I am not sure if you can just call up the IP on port 8002, without the redirection happening..

Here I fired up my wifi on my pc, no I can not just access http://192.168.6.8002, but if I try and go to some site that http, www.cnn.com in my example get redirect to the captive portal.

It currently isn't asking for voucher - because I currently don't have them turned on..

So put a pc on your whatever network your wanting to use for captive portal, and go to http://www.cnn.com and you should get redirected to the captive portal page.. here is sniff showing

I do a dns query for www.cnn.com, I then try and go to that IP.. 146.xx pfsense lets me think I am talking to that IP, but sends me a 302 saying hey go here 192.168.6.253:8002 with this specific url..

Which then presents me with the login..

This is really clicky clicky.. There is nothing really to do..vs trying to call up the portal page directly.. do what actually happens. I would suggest you duplicate the simple test I did.. I am showing you exactly what happens via the sniff I did.

Gertjan

@johnpoz

Nice.
Your "cat /tmp/rules.debug | grep cpzoneid" shows how the portal works.

This :

ether pass on { igb3.10  } tag "cpzoneid_2_rdr"

tags all the packets coming into your portal interface with "cpzoneid_2_rdr".

This is the magic :

rdr on igb3.10 inet proto tcp from any to ! <cpzoneid_2_cpips> port 80 tagged cpzoneid_2_rdr -> 192.168.200.1 port 8002

I read this as follows:
For the "tagged cpzoneid_2_rdr" tagged traffic do this :
Redirect (rdr) TCP traffic from anybody (all the devices on the portal network) with a destination that is not <cpzoneid_2_cpips> (= the pfSense captive portal interface IP or 192.168.200.1) to the portal interface (= the pfSense captive portal interface IP or 192.168.200.1) port 8002 (where 8002 is the http - not https - captive portal web server) as seen here :

@Jozy said in [Captiv portal and vouchers integration with ssid on wlc 9800](/post/1196793):
> tcp6 0 0 *.8003 . LISTEN
> tcp4 0 0 *.8003 . LISTEN
> tcp6 0 0 *.8002 . LISTEN
> tcp4 0 0 *.8002 . LISTEN

where port 8002 is used for "http" and port 8003 is the "https" interface;

Btw : https is used when

is checked.

Be ware, using https means you have to use a certificate that and portal user trusts ( !! ).
It might still work, with the classic browser warning that tells you you use a self signed certificate (and not trusted).

Extra info :
See the nginx portal web server config file which is called something like :
/var/etc/nginx-cpzone1-CaptivePortal.conf

In the "server" block, you see how redirecting is applied.

This works because :
When an Ethernet connection is created, first, the DHCP client does it's work.
When done, the network client has an IP, a gateway, a DNS and a network (mask).
If I take the example of @johnpoz this would be :
IP : 192.168.200.1
DNS 192.168.100.1 ( !! so pfSense is the 'DNS' for the assigned captive portal network clients)
Gateway : 192.168.200.1 ( !! )
Network : 255.255.255.0 or /24

And now the real magic kicksz in : every device, actuall : every OS, as soon as a ethernet connection comues up, fires up a https request.

For an Apple device, this http (not / never https !) will be :

http://captive.apple.com/hotspot-detect.html

Click on it to see what is happens.
It should return a 6 letter "html page" showing just "Success".
If this is not the case, the presence of a captive portal is suspected.
The device will open up a web browser (or show a notification to the user somewhere) and it will visit the same link again http://captive.apple.com/hotspot-detect.html and time, as this is a browser request : a classic http = port 80 request, it will get redirected to the 192.168.200.1 IP - port 8002, and you'll be able see what happens.

And what will show up ? Our login portal !

Another info page : See here : Status > System Logs > System GUI Service
where you can see the https requests from the captive portal web server.

johnpoz

@Gertjan nice write up..

@Jozy you could always just have the wlc do the captive portal as well, the one reason I could see having pfsense doing it is if you also had wired devices on this same network that you wanted to have to use the captive portal as well.

Personally I have little use for captive portal.. For my guests that want to use my guest wifi network I just hand them a card with a qr code on it to get them on the network.. They would hate how long and complex the psk is to type in ;) hehehe

They really only make sense when you need to time limit someones access, or have them pay for access, or can not in anyway just let them know the psk, etc. There are plenty of use cases where it makes sense, but in a home or smb sort of setup not really.

Gertjan

@johnpoz said in Captiv portal and vouchers integration with ssid on wlc 9800:

I could see having pfsense doing it is if you also had wired devices on this same network that you wanted to have to use the captive portal as well.

Actually, wireless or wired devices, it's all the same.
After all, captive portal support is mostly handled by the connecting device, not the router/firewall, like pfSense.

johnpoz

@Gertjan my point was if all he has was wireless devices he wanted on it he could just use the wlc.. Not sure how the wlc would work for wired device on the same vlan as the wifi?

Jozy

@johnpoz
I really dont know what the exact issue is here.
Customer is looking for voucher on Guest SSID and it should be setup but now this is not working. :(

Gertjan

@Jozy said in Captiv portal and vouchers integration with ssid on wlc 9800:

Customer is looking for voucher on Guest SSID

What do you man by that ? The customer doesn't have a voucher ? He lost it ?
Or do you mean : he doesn't know what to do with it ?
Or does the login screen not show up ?

Normally, when installing a captive portal, set up one without any "users" or "vouchers", just this :

and make sure everything works first.
This 'everything' is actually a lot already.

See also here for help : Troubleshooting Captive Portal

@Jozy said in Captiv portal and vouchers integration with ssid on wlc 9800:

but now this is not working.

It worked before ?

Jozy

@Gertjan No, Im trying to configure it first locally at my company environment, then provide it to the customer, since they are looking for that solution.

Anyway, after configuring CaptivPortal, what URL should I use to get CaptivPortal, since port 80 should redirect me to CP but not working.

Gertjan

@Jozy said in Captiv portal and vouchers integration with ssid on wlc 9800:

Anyway, after configuring CaptivPortal, what URL

Initially, None.
When set up correctly, a confection device is redirected to the captive portal login page. This user will never know - and doesn't need to know the port (8002, or up) used.

Later on, you will want to use https login, as it look 'better' ( and nothing is really http based anymore ).
Then you will have to deal with a domain name, certificates and so on. That is the moment a host name (URL) is mandatory, like "portal.your-domain.tld".
The portal user doesn't have to know this host name (URL) is he will get redirected to it automatically.

There are a couple of captive portal videos here https://www.youtube.com/@NetgateOfficial/videos - they are old but still very valid.

Jozy

@Gertjan Something which is very interesting i that I can access to pfsense as you can see bellow

but I should be redirected to captive portal not pfsense page.
After page appear I can easily type username and password of the pfsense and get in which is not something I want.

You can see bellow picture taken from wlc/ssid which redirect me to 10.223.100.180

Why redirection to captive portal not working it is weird or should I use some other "redirect URL for login" on wlc?
Anyway I have enable captiv portal and voucher and not working. Can it be some bug on software since Im using it on VMware or?

Gertjan

@Jozy

What is thsi :

Are you using some sort of captive portal behind another captive portal ?

Just use 'simple' access points, and it will work ?!

Jozy

@Gertjan its virtual ip address configured on wlc, with or without that address it is the same end.
What do you mean saying "simple" access point?
What would be that simple access point?

Gertjan

@Jozy

These, I guess.
I mention these as they work fine for me, I use them.

Jozy

@Gertjan Unfortunately I have Cisco wlc and have to try setup it with that one :)

Gertjan

@Jozy

TO set up the captive portal, do as the doc and videos tell you.
You don't need any access point or whatever. A captive portal with wired device will also work just fine.
Hook up a dumb switch into the captive portal interface, and hook up a laptop or a desktop PC into the switch.
Now you have everything you need to make it work.

When then pfSEnse captive portal works, only then you start to use the "wlc 9800".
If at that moment the captive portal stops working, call Cisco ;

Jozy

@Gertjan Captiv Portal is working now. Problem was with WAN interface and DNS forwarder.

Best regards,
Jozy

Jozy

@Gertjan @johnpoz Hi guys, here I am again.
So, if you know or had the similar situation.

As I mentioned above Captive Portal is working fine, but only working when Im connected to the same network not when enable wifi adapter.

When I try to reach CP while trying to connect to wifi it isnt reachable.
I have Cisco WLC configured and redirections to http://10.223.103.230:8002/index.php?zone=CaptivPortal& which is Captiv Portal it isnt working.
Whan I try to paste http://10.223.103.230:8002/index.php?zone=CaptivPortal&?switch_url=https://192.0.2.1/login.html&redirect=<website-name> while using the same network (10.223.103.58) it is working fine.

I have to monition that 10.223.103.x is wifi subnet.

Problem starts when I try to reach Captiv portal while trying to enable wifi adapter and test SSID on both cell phone or PC not working, it doesnt redirects me to nowhere, I just get ip adress over DHCP which is configure on win server and other setup but CP not opening.

Do you know what could be the problem?

Best regards,
Jozy

johnpoz

@Jozy said in Captiv portal and vouchers integration with ssid on wlc 9800:

I have Cisco WLC configured and redirections to http://10.223.103.230:8002/index.php?zone

You shouldn't be doing anything with captive portal on your wlc if you want pfsense to handle it - if your wifi devices are on a different network then on that network in pfsense setup the captive portal.