![]() When I reset my IP (I have tried this method and manually resetting it) the problem will go away for several hours to days but returns. I have never set up any sort of network with my ethernet and as far as I am aware all of my security is up to date, so is someone possibly using my network? A few weeks ago when the problem was more consistent, I would click on the symbol for my ethernet connection and it showed “Gordon PC” as connected (no one on my floor has that as a first or middle name or anything resembling it and most people are using macbooks), this has disappeared but the problem with someone using my IP has returned. The problem goes away when I connect with wifi but I prefer to use ethernet as the connection runs faster (roughly sixty people use the wifi on my floor alone). I am living in a university dorm (and therefore have no access to the router, just my ethernet cable). The other reason this is less likely is because this problem can be semi-reliably reproduced by simply rebooting an iOS device on a network with only 1 IP assigned (usually 192.168.0.1 or similar).īottom line: if you see the ‘Another device has your IP’ error message, don’t freak out, it’s probably not a security breach, and it’s probably a very simple fix. I say this is much less likely because assuming you have some reasonable wireless security precautions in place this is very unlikely, there simply aren’t that many people out there with the knowhow to crack into a secured wireless network. Warning about Spoofed MAC addressesĪnother possibility (although much less likely) is that someone has managed to spoof your MAC address and IP and is attempting to gain access to your network. In the meantime, try one of the fixes, they should get your Mac back online in no time. Why does this error show up at all? I assume this is just a bug with how iOS interacts with certain routers DHCP management, it happen to Apple’s own Airport too so perhaps that will spur a patch sooner than later, but by no means is this limited to Apple routers, and you can encounter it on any wi-fi network (and even some wired networks too). Apparently these iOS devices like to maintain the same IP address and will attempt to force themselves onto the same IP that they had previously been assigned, which can lead to the error message.ġ: The easiest solution is to just reset the router, but that can be a pain depending on your access to the router itself.Ģ: If resetting the router is a no go, you can also try to renew your DHCP lease in Mac OS X either through the command line (as the linked article shows) or through the Network settings System Preference panels as described here.ģ: The other option is to manually set an IP address to a static IP and have the IP range be far enough apart so that the devices do not conflict. For whatever reason it seems that another Mac, or the iPod touch, iPad, and iPhone is often the culprit. It looks to be a problem with the DHCP server, which mistakenly assigns the same IP address to two devices, but don’t blame your router quite yet. 3 Tips to Resolving the IP Conflict in Mac OS X
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