Hello,
im currently trying to fix a school using the RM safetynet system that is having issues after changing the subnet mask.
the issue is on autoproxy the device can only talk to google domains (e.g. google.co.uk, youtube.com or gmail.com) any other website (e.g. bbc.co.uk/news or RM Education - Proxy Test) does not work. this is for all devices on the network not just ones configured on the domain. this happens on all OS's (windows, OSX, android & IOS ) .
as soon as a manual proxy is set the device is fine but this is not workable for devices that go offsite
I have checked the devices configuration to see if its got a tattooed PAC or fixed proxy and they doesn't have anything saved
i have also checked DHCP and DNS and these are configured correctly and work with the manual proxy
many thanks for any help.