External captive portal on USG1900: bad format url and page not found after login with Chrome

LALU · October 2020

Hi, I have implemented an external captive portal on USG1900.
I have simulated a new guest that connect to Wi-Fi network for the first time,
so I deleted the browser cache of Chrome.
When the guest call a web site, for example "tio.ch", the USG 1900 redirect to captive login page with the following URL (see image because the forum was correcting my url)

https://www.screencast.com/t/ocYz9SW7YP

We can see that the characters "://" has been converted in %3A%2F%2F

After the login, he receive the following error:

The requested URL was not found on this server.

after this, I logout and call the page "tio.ch" again: now the URL seems more readable and correct than the first one.

http://www.domain.ch/login/?gw_addr=http://10.0.8.1:80&error_num=0&mobile=1&ps_display=0&ps_path=&wg_display=0&uag_mac=B8:EC:A3:B4:C0:97&wtp_mac=&client_mac=B4:C4:FC:6C:9F:40&ap_ip=&client_ip=10.0.8.110&ssid_name=&vlan_id=&auth_path=/weblogin.cgi&mp_idx=1598506866990074&original_url=http://tio.ch/weblogin.cgi?mobile=1

After the login the guest are redirected correctly to "tio.ch" website.

With the last EDGE browser the problem isn't present.

This is a bug of CGI script on USG1900 ?

Best regards
Luca

LALU · October 2020

chandan · October 2020

The current configuration on USG devices allows the internet explorer browser to display the login URL properly. The same is with Web Authentication also..