I am working at a site where in DNS as well as the obvious 169.154.*.* 'Host (A)' records in DNS, there are a number of 'Host (A)' records that are for classless subnets that exist on the LAN (eg: 10.3.2.0). My assumption is that these can be deleted. However I wanted to check if there is something that causes this to happen legitimately that I don't know about or does anyone have an idea as to how this could happen. All DCs are Windows 2003 SP2 and the Domain&Forest Functional levels are Windows 2000 Native.
CormacITComSec, I know clasically the x.x.x.0 address it considered the network address, but we can use this to address a box. What is registered to this IP address? is the sebent it is on have more than a /24 mask (i.e. - 10.1.1.0/23 would include 10.1.1.0-10.1.2.255 so 10.1.2.0 would be a valid address in most cases). Also I am betting that this is happening via dynamic update, do you have DNS "Secure-Only" updates turned on? If so in most cases you can see the computer that preformed the update 9if you are itherwise unsure) by looking at the record sercurity (just like a normal file) and looking at the owner of that record.
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