To request change and identify if the site is a risk please visit Palo Alto Networks URL filtering - Test A Site. 

1.  Navigate to Palo Alto Networks URL filtering - Test A Site 
2. Copy and paste or type the website into the search bar and check the captcha.
3. Press search to see the sites information and what category risk it is. See Figure 1. 
4. If needed, click the Request Change button and get your site's risk reduced and able to get through the ISU net firewall.
   Figure 1

The Information Security Office is in the process of blocking access to sites deemed malicious. You may get a different web page alerting you of the blocked site depending on the browser used to access it. (See Figure 1). 

Figure 1

If you encounter a blocked page with the ‘Report an Incorrect Block’ link at the bottom, you can use that to prompt a review of the page (See Figure 2).

Figure 2

If the option above in Figure 2 does not appear and you would like to request a review to unblock a page, please contact the Technology Support Center, who can then forward your request for further review and send us a service ticket requesting the page to be reviewed for unblocking. See the How to Get Help section below. 

Safe Links is a feature in Microsoft Defender for Office 365 that helps protect users from malicious URLs found in emails and Office documents across Windows, iOS, Android, and other platforms. By performing real-time checks each time a user clicks a link, it mitigates phishing and other malicious threats. (Figure 1) 

Figure 1: