Web policy block page not loading

Question

When trying to access a website that is being blocked by a web policy, the Sophos page that typically loads saying the site is blocked is not loading. Tried this in both Safari and Chrome. I'm just getting the error (in Safari): 
 Safari Can't Open the Page 
 Safari can't open the page: "172.16.16.16:8090/ips/block/webcat....<truncated>" because the server where this page is located isn't responding. 
 Similar error in Chrome (e.g. "This site can't be reached").

Dom Nik · Accepted Answer

Hi shred, 
 I had the same issue. 
 You need to activate the captive portal service on the XG. 
 Best Regards 
 Dom

Michael Dunn · Answer

Some Context/Info: 
 In Administration > Device Access each column corresponds to opening up a port. In "Captive Portal" corresponds to port 8090, and in v15 that is all it did. However port 8090 is actually used for several other things in web as well, including Warn/Proceed (introduced in v16) and Sandstorm (introduced in v16.5). In v18 port 8090 is also used extensively by the DPI mode proxy. The column header "Captive Portal" is increasingly misnamed as it is actually enabling many different things. We are aware that this is confusing and are looking at our options. This might be renaming the column, or it might be splitting between multiple ports/columns. 
 In conclusion, if you are using any of the following features, you need to enable Captive Portal within the relevant zones: 
 
 Captive Portal 
 Web Policy "Warn" action 
 Sandstorm within Web Filtering 
 DPI mode within Web Filtering