Issues since enabling authentication

Question

Several months ago I enabled Authentication on my XG v16 VM since this I've upgraded to V17 and still experience the below issues. 
 
 After enabling authentication at times I will randomly loose internet access this seems to happen in particular when waking a Windows 10 laptop from sleep although not exclusively. I have several firewall rules one with Authentication enabled and another just below with Authentication disabled. When this issue occurs if I try to ping an external address this times out however I am able to ping XG and various other Internal IP addresses although remote addresses over my IPSEC VPN are also unreachable. 
 
 When checking in the logs I'm unable to find any obvious issues and a reboot of the device in question seems to resolve the issue until the issue next occurs. I have STAS and RADIUS SSO enabled and both seem to be working fine except this issue. 
 
 Has anybody had any experience of a similar issue? 
 
 Any help is greatly appreciated 
 Thanks

danecix Cicco · Accepted Answer

Hi. I had the same problem and in my case I discovered that it was because the Sophos Transparent Authentication Suite could not connect via WMI to the workstations. Try deactivating the firewall of the workstation and see if the problem persists. If the user remains connected then that was the fault. To fix it, enable the firewall entry rules for WMI, or you can also do it from the GPO. 
 LuCar Toni tellme that there is a KBA for configure WMI. community.sophos.com/.../123020

Fernando Durso · Answer

I had similar issue. In my case disabling logoff detection at STAS client and using only the firewall options to control the login time and transfer threshould did the trick...