I am using my Sophos XG135 as a DHCP server and configured in gateway mode, Running firmware version SFOS 18.5.2 MR-2-Build380. Internet connection is only active for a period of a bout 20 minutes and then it is lost but the WAN interface shows it is up and connected. Internet connection only returns after restarting the firewall or going to the WAN interface, save and update interface. I have to keep doing that every after a period of 20 minutes when i lose the internet connection, the connection from the ISP is very fine, when link is isolated from the Firewall, I don't lose connection to the internet at all. any one else experiencing the same or any solution to this issue?, it is really frustrating me.
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