Custom Webpage Inquiry

Ktrippings Lv1Posted 2026-Jun-19 08:48

Hihi!

Can I ask for info about how the Custom Webpage works? We have a client that wants to have the Custom Webpage pop up in restricted website in url filtering. I want to confirm whether the Athena NSF requires the authentication policy to be enables in order for the Custom Webpage to pop up. or Does it apply only to Application control?



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Humayun Ahmed Lv4Posted 2026-Jun-19 11:54
  
Yes, you can use the Custom Webpage feature for URL Filtering, and it does not require Authentication Policy to be enabled.
Achmad Tegar S Lv1Posted 2026-Jun-19 13:07
  
hi as far as i know, you have to enable decryption if you want Custom Webpage to pop up when accesing restricted website in url filtering because your firewall cannot inject a custom message inside an encrypted stream.
Prosi Lv3Posted 2026-Jun-19 23:38
  
This depends on where the traffic is being intercepted.
George Fady Lv2Posted 2026-Jun-21 06:15
  
H ,
The Custom Webpage feature is not dependent on Authentication Policy. It can also be used when access is denied by URL Filtering, Application Control, Antivirus, and other security modules that support redirection to a notification page.

For the specific scenario of URL Filtering:

Authentication Policy is not required for the Access Denied page to appear.
The firewall will display the configured "Access Denied" custom webpage when a URL Filtering policy blocks the user's access.
For HTTPS websites, SSL/TLS Decryption should be enabled if you want the firewall to inspect the URL accurately and present the custom block page. Without decryption, the firewall may only be able to terminate the connection or show a browser certificate/error message depending on the website and browser behavior.

You can configure the page under:

System → General → Custom Webpage → Access Denied

As shown in the screenshot, the description explicitly states that this page "appears when access to a website is denied", which includes URL Filtering block actions.

In summary:
✅ URL Filtering supports Custom Webpage redirection.
✅ Authentication Policy is not required.
⚠️ For HTTPS websites, SSL Decryption is recommended/required to ensure the custom block page is displayed properly.

Hope this helps.
Korchai Lv1Posted 2026-Jun-21 14:19
  
Hello, as far as I'm aware, your firewall cannot inject a custom message inside an encrypted stream, hence you must activate decryption if you want Custom Webpage to appear when accessing prohibited websites under url filtering.

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