Meraki Block Page Not Displaying for HTTPS Traffic

[guitb]

I'm having trouble getting Meraki block pages to display correctly for HTTPS traffic. I've configured a Layer 7 firewall rule to deny access to a specific website, but when users try to access it via HTTPS, they see a generic browser error ("Website can't be reached") instead of the Meraki block page.

What could be causing this, and how can I ensure the custom block page is shown?

[PhilipDAth · Accepted solution]

This is expected behaviour.  The MX has no certificate to be able to display an HTTPS page.

[guitb]

Any meraki documentation about this?

[PhilipDAth]

This is the first link that Google bought up.

https://documentation.meraki.com/MX/Content_Filtering_and_Threat_Protection/Content_Filtering/Conten...

[guitb]

Thank you @PhilipDAth for the fast response.

[BlakeRichardson]

This is a vendor agnostic problem it's because of how HTTPS works. Unless you are doing deep packet inspection you won't receive a splash page. 

I would suggested using the URL http://example.com or set users homepage to be an internal URL that has an HTTP redirect to Google or something.