I got a popup warning "another device on the network is using your computer's IP address"

Question

Level 1

4 points

I got a popup warning "another device on the network is using your computer's IP address"

I looked up the IP and its in Italy (192.168.0.101). Should I be worried? I have noticed my computer screen being glitchy.

My settings are:

Configure IPv4: Using DHCP

IPv4 Address: 192.168.0.101

Subnet Mask: 255.255.255.0

Router: 192.168.0.1

Configure IPv6: Auto

I currently have 3 macs in my office connecting to the internet, my 2 iphones, 1 laptop and 1 ipad.

Any thoughts, comments, or help would be much appreciated.

Thanks

Posted on Feb 10, 2014 11:12 AM

Reply

Answer 1

sh3mpy Author

Level 1

4 points

Feb 10, 2014 11:12 AM in response to sh3mpy

p.s. I'm in Orange County, CA.

Reply

Answer 2

Feb 10, 2014 11:25 AM in response to sh3mpy

You should have your Network set for WPA-2 Security and not as an open Network where anyone can access it. It almost sounds like your Network isn't Password Protected and someone close is using your Network.

Cheers

Don

Reply

Answer 3

sh3mpy Author

Level 1

4 points

Feb 10, 2014 11:49 AM in response to Donald Morgan

Hi Donald,

Thanks, I had my old IT Guy set up my office and this was how he did it? It's password protected for all of my wireless products. Thoughts?

Oh and I noticed I had left my logmein on for months. Could that have been how this person in Italy got in?

I just logged into my dlink IP and changed the passwords/network names. The security mode was set to: Enable WPA/WPAS2 Wireless Security Enhanced.

I realized my old IT guy (who died last year) had a very simple login for the dlink login. Maybe someone hacked into many of his old clients?? I think this should resolve the issue.

Thanks

Reply

Answer 4

Linc Davis

Level 10

209,535 points

Feb 10, 2014 12:21 PM in response to sh3mpy

There are several possible causes for this behavior.

1. Two (or more) computers on the local network have the same Bonjour name, such as "X's-MacBook-Pro.local". Resolve the name conflict by renaming one or more of them in the Sharing preference pane.

2. You have two simultaneous connections to the same local network: probably Ethernet and Wi-Fi. If applicable, disconnect the Ethernet cable or turn off Wi-Fi.

3. A Mac wakes from sleep due to network traffic. This is a bug in OS X that may only affect some models.

4. A device that gets its network address from the router wakes from sleep, and the address it was using before has been assigned to another device.

5. A third-party wireless router has incompatible settings or firmware. In that case, refer to the manufacturer or ISP for support. Restarting the router may help, temporarily.

6. See also this support article.

Reply