I work at a university and something strange is happening: sometimes, people in my department lose internet connectivity. When I check the adapter properties (IPV4), I notice that the subnet mask has changed itself!
We use the format 255.255.255.0 regularly and the change is always to 255.255.0.0. This appears to happen after Windows updates much of the time, but occasionally happens after a user turns their computer on.
Most of these users are using Windows 7 Pro.
The format of our IPV4 is like this:
IP: 123.456.78.910
Subnet Mask: 255.255.255.0
Default Gateway: 123.456.78.9
DNS Server: 123.456.456.123
Obviously the IP at the end is from 1-255 but just to avoid confusion I used those numbers.
Any help would be appreciated as our IT guys have no idea why this is happening!
Thanks!
We use the format 255.255.255.0 regularly and the change is always to 255.255.0.0. This appears to happen after Windows updates much of the time, but occasionally happens after a user turns their computer on.
Most of these users are using Windows 7 Pro.
The format of our IPV4 is like this:
IP: 123.456.78.910
Subnet Mask: 255.255.255.0
Default Gateway: 123.456.78.9
DNS Server: 123.456.456.123
Obviously the IP at the end is from 1-255 but just to avoid confusion I used those numbers.
Any help would be appreciated as our IT guys have no idea why this is happening!
Thanks!