I have created one custom response page(including image) that is for application block and URL block.
example:- If someone wants to access a restricted URL or application the page should be displayed on the customer screen.
I can see, once I apply the custom response page in the URL block page and application block page. then access the HTTP traffic the page display was showing properly, however, while accessing the HTTPS site not able to get the response page.
I have applied the SSL forward proxy decryption. and the traffic decrypted correctly.
Can anyone help me to achieve this?
I modify to the default page and add an image to refer to these documents:-
then i am getting the below block page that is expected.
but the custom page that is created by my team is not working.
We mentioned this that you need to check if the custom page for example uses img tag that gets the image from a server URI, where HTTP is allowed but HTTPS is not allowed by the server or the firewall or other security policy. I think you need to check this with your team that made the custom page.
Use F12 devtools or HTTPWatch or Fiddler to check the code for the response page as I think the Palo Alto or web blowser automatically change for example:
<img src="http://www.w3schools.com/images/lamp.jpg" alt="Lamp" width="32" height="32">
<img src="https://www.w3schools.com/images/lamp.jpg" alt="Lamp" width="32" height="32">
As it was said better host images and so on things on the Palo Alto firewall than making the user to connect to a server for the image of the custom page and as you see you will not have such issues.
Have you found a solution? We are facing the same issue here.
We decrypt all traffic. The response page works fine for http but for websites with ssl the browser identifies an unsecure connection although we have a valid certificate installed. I tried already all the ideas mentioned before, but it is still not working.
The browser shows redirection issues. For ebay.de the response page starts with: 'https://126.96.36.199:6081/php/urladmin.php?args=AAAAaQAAABBAJiCETo.....' .
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