No Internet Access Notification

HI Steven ,

Sorry to hear about the problem you are facing with XG appliance . I would like to help you with your issue, seems in most cases that would be an issue due to Web-filter or Application Filter policies applied. 

Scenario:

Since the connection status icon can only show the status for one connection it will aggregate the individual statuses and display the most limited connection. Therefore if more than one network adapter is present, but only one probe succeeds, Windows will still report “Limited Access “and indicate a Local only status. In Microsoft DirectAccess, NCSI is also used for Inside/outside determination (Outside corporate network or Inside corporate network). To do this the NCSI process tries to communicate with the I/O (Inside/Outside) server using an HTTPS query.

Every time a network configuration event occurs (meaning that something has changed in the network configuration), the NCSI process performs several tests to identify the network’s connectivity status. The first step NCSI performs is a DNS query for www.msftncsi.com. The second step is and HTTP get request  or http://www.msftncsi.com/ncsi.txt. This file is a plain-text file and contains only the text “Microsoft NCSI.” Last it will perform a DNS query for dns.msftncsi.com. 

Taken from reference 

https://technet.microsoft.com/en-us/library/cc766017(v=ws.10).aspx
https://blogs.technet.microsoft.com/networking/2012/12/20/the-network-connection-status-icon/

Test to isolate the source of the issue . 

• Create a Test rule with policy Allow All for both Web-filter and Application Filter for your system facing this issue . Make sure the traffic traverses through that rule .
• If the issue persist then you may no change policy to None and restart the services . 
• Check the Log Viewer if any of the website is denied that is used to check the status of the connection in both Web/application and IPS. 
• If you are using HTTPS Decryption/Scanning then bypass the URL via the HTTPS exception list https://community.sophos.com/kb/en-us/123360 as the connection is HTTPS 
• You may create a Destination based Firewall rule/ FQDN rule and allow the URL/Public Address which is positioned on the top with no Scanning and Web/application applied. For FQDN kindly refer the link https://community.sophos.com/kb/en-us/123035

If you still face the issue , Kindly DM me your findings that would isolate the source of the issue .

Thanks and regards
Aditya Patel | Network andSecurity Engineer.

Thanks Aditya for the information.

I guess part of our problem is that it happens randomly to users and is not consistent between different users.  I have a ticket open now with support and hopefully they can help us along with your recommendations of how to isolate the issue.

HI Stevan ,

Could you share your Service Request so I may look into it  ? , Kindly Message me and do not post it for Public viewing. 

Thanks and Regards 

Aditya Patel 

Network and Security Engineer.

Hi there,

I am also experiencing this problem on my SG310.  Intermittently and among random users, windows 10 will decide that there is no internet connection, even though there is.  How did y'all ultimately solve this problem?

Thanks,

Pierce

Do you use STAS or other Authentication Services? 

SG(UTM9) or XG(SFOS)?

Uh no I don't believe so, but then I again I did not build this network.  How would using STAS break Microsoft's Network Status Connection Indicator thingy, though?

Depending on the configuration.

https://social.technet.microsoft.com/Forums/en-US/db5a38df-a888-4bf9-8f70-0eea9ce4953b/yellow-triangle-over-network-connection-icon?forum=win10itpronetworking

STAS with quarantine and false configured could cause sometimes such Drops. 

LuCar Toni

I have same randomly event on my network and i use STAS can you explain which i need to take care for the configuration ?

LuCar Toni

I have same randomly event on my network and i use STAS can you explain which i need to take care for the configuration ?