short period of losing connection and reconnect

Question

Users are reporting short period of internet loss, so they loose connection for 5 seconds and the connection come back afterward. 
 
 We are using a sophos xg 
 Firmware version: SFOS 18.0.4 MR-4

emmosophos · Accepted Answer

Hello Wesley, 
 Thank you for contacting the Sophos Community. 
 When this issue happens, does it affects all users at the same time? 
 Try disabling Firewall Acceleration and monitor if the issue persists. 
 console> set advanced-firewall tcp-selective-acknowledgement off console> system firewall-acceleration disable 
 Regards,

LHerzog · Answer

please have a look on the Pattern updates for IPS. This may cause interupts, mostly on small appliances. 
 Do the install times match your disconnects reported by the users?

rfcat_vk · Answer

They are broadcasts that the firewall will reject. They are not the cause of your failures. 
 Ian

JasP · Answer

If you are using STAS, make sure the setting "Restrict client traffic during identity probe" is set to No. The default (Yes) causes drops in connectivity.

short period of losing connection and reconnect

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