Network Icon on Computer Shows "No Internet Access" When Behind Firewall

Steve87

Firebox is a Fireware XTM 12.1.3. When computers behind the firewall, the network icon on computer task bar shows "No Internet Access" even though we do have internet access and don't appear to have any issues. The problem is when trying to update Adobe Cloud Documents, Adobe senses this as not having internet access and won't update. I'm not able to see anything being denied when looking at Traffic Monitor, but when tethering computer to my cell phone, bypassing the firewall, the icon changes and shows "Internet Access" and I'm able to update just fine.
Does anybody have any ideas what could be causing this?

Thanks,

Steve

james.carson

Hi @Steve87

Windows uses a network check like what's described here:
https://blog.superuser.com/2011/05/16/windows-7-network-awareness/
(it's effectively the same in subsequent versions of windows, but it also checks HTTPS now, too.)

The windows client needs to be able to do the DNS lookup, and also make an http connection to that specific web service, and download the text. If it can't the check fails. If you run through the steps, you can determine where it's failing.

You can also look in your system's event logs for more information about why the NCSI test is failing.

Determining what the windows clients think the problem is lets us know where to go next. Without any further information, my instinct would be the proxy isn't allowing it to get the text file due to a setting. If the firewall is denying access to http://www.msftncsi.com/ncsi.txt you should see a proxy deny page saying why.