Hi Everyone.. Looking for feedback if anyone else is seeing possible issues with new installs of XG's running 17.5
We've recently installed a number of XG230 (SFOS 17.5.0 GA) at various clients and they are ALL having a similar issues with what looks to be DNS resolution.
The XG's have had IPS /Heartbeat / ATP all turned off to test - rules enabled for LAN any to WAN any etc and all policies off (to test).. So it should have nothing stopping / scanning traffic in or out - but the issue still happens.
It basically looks like a random drop but it's affecting most users at the same time - if they have outlook running on 365 open then that connection will also drop, FTP, etc basically anything that relies on an external connection will stop for a short period (10-20secs).
The client sites have internal DNS servers that are fully functional and not logging any issues.
You still appear to be able to ping an external IP when the drops happen. There is no indication of issues with ISP or lines.
Sophos have been looking at it for the last couple of weeks..
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