Somones using my computers ip adress

Nichrøbe

macrumors newbie
Original poster
Dec 1, 2018
22
0
my house
so couple weeks ago a random pop up came up in the middle of the screen on my MacBook Pro saying someone is using your computers ip adress should I be worried?
 
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Loki.Mephisto

macrumors 6502a
Don‘t think so. How do you obtain the IP address? Is this happening on your router or a public network?

The message just tells you that within the network you‘re in your IP address is also assigned to someone else, hence it is not unique withing the network any more.
This is not per se a security issue; however it may cause disruption in network services. Imagine your phone number is assigned to someone else too. May - and probably will - cause issues
 

Nichrøbe

macrumors newbie
Original poster
Dec 1, 2018
22
0
my house
Don‘t think so. How do you obtain the IP address? Is this happening on your router or a public network?

The message just tells you that within the network you‘re in your IP address is also assigned to someone else, hence it is not unique withing the network any more.
This is not per se a security issue; however it may cause disruption in network services. Imagine your phone number is assigned to someone else too. May - and probably will - cause issues

How could I stop them from using it?
 

Loki.Mephisto

macrumors 6502a
It depends. Is this your router within your premises? Does the message appear frequently?

If yes and given your router is handing out IP addresses using DHCP its probably just a router error / mishap.
Assuming your router is using WPA2 encryption you should be safe - a perpetrator that already was able to crack your encryption should have no issues getting an IP address anyway.

In summary (assuming its your router):

- make sure it is configured to use WPA 2 encryption. Make sure your WPA 2 password is rather lengthy, uses random characters, numbers an special characters like slashes, backslashes, stars, etc.

- maybe you ask a friend who is somewhat literate with computer stuff if you do not feel fit to do that yourself

- don't worry too much. As said probably just a networking glitch

- please answer the questions already given in the previous post (as well as the questions above). Without knowing your environment and where this is happening all we can give is some general hints and guesswork.
 
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