Anyone help on this one. I have had a mini server running for over a year problem free. Last night sometime the server came up with a warning that there was another machine on the network with the same name so it decided to change its name. It was dnssigns and now is reading dnssigns2. Problem is NO other machine on the network has a name anywhere close to that. This has caused havoc as far as apple tvs etc. All functions are running fine, nothing seems out of place, network traffic is normal etc. I still have all admin control. Any idea why a machine would allow, say a person trying to hack into the network with a same named machine and no passwords, to get in and then decide to change its name?