topic Hacking URL, direct thru Palo, deny reason "block URL", via a search thru google, gets a reset page. in General Topics

Hacking URL, direct thru Palo, deny reason "block URL", via a search thru google, gets a reset page.

tstores31 — Wed, 24 Oct 2018 17:50:51 GMT

When you go directly to "shodan.io", which is categorized as a hacking site, the palo will block that URL. When searching thru google for that site, then click on it, a reset page is sent, need to understand why? Is it considered a "threat" if google makes the request? so the threat settings would be used instead of the URL Filtering Security settings? Would Severity settings come into play?

Re: Hacking URL, direct thru Palo, deny reason "block URL", via a search thru google, gets

tstores31 — Wed, 24 Oct 2018 19:09:58 GMT

Going directly to the site from my browser the request uses port 80(web page blocked), when using google search the request uses port 443 and I receive "This site cannot be reached" "The connection was reset".

Re: Hacking URL, direct thru Palo, deny reason "block URL", via a search thru google, gets

LukeBullimore — Wed, 24 Oct 2018 19:54:29 GMT

Hey @tstores31

You were pretty much on the right track with what you said. When you go to "shodan.io" it uses HTTP. The firewall can do a "man in the middle attack" on this HTTP session and present the URL block page.

On the Google Search result for shodan.io, the URL is https://. Without SSL decryption, the firewall cannot do a MiTM attack on the SSL site to present the block page, however access to the site can still be blocked as per your URL filtering configuration.

To conclude, if you want to present block pages for SSL sites - you will need to configure SSL decryption.

Cheers,

Luke.

Re: Hacking URL, direct thru Palo, deny reason "block URL", via a search thru google, gets a reset page.

aleksandar.astardzhiev — Tue, 06 Jul 2021 05:51:05 GMT

Hi @pal7mentor ,

In addition to what @LukeBullimore says you should be able to enable block page for encrypted traffic even without SSL decryption

Details in the following link - How to Serve a URL Response Page Over an HTTPS Session Without ... - Knowledge Base - Palo Alto Networks