Message another device on your tcp/ip internet

Recently on my wifes old iMAC flower power she has been getting the following message pop up when she clicks on Send/Receive on Outlook Express:
Another device on your TCP/IP internet, which has the physical address 0014A432 95 79 is currently using the same IP address 192.168.0.3 Your TCP/IP network interface has been shut down.
It doesn't stop her from sending or receiving Email on outlook express. I rebooted her computer on OS10.3.9. Then Mac Mail and OE (Clasic version) doesn't get this message. When we reboot on OS9 OE gives this message again after clicking on Send/receive. We share a cable broadband system through a Netgear 4 port + WiFi router. Both computers are hard wired to the router.
This message doesn't come up every day.

Like Eby says you need DHCP address allocation and NAT on on your router.
It sounds like they are already on, given that the iMac reports an IP address of 192.168.0.3. Or does the iMac explicitly allocate itself that IP address in the TCP/IP control panel ? Can you open the control panel and tell us what you see.
Does the iMac have another network connection ? by wireless or firewire ?
Also check your computer (doesn't say if its Mac OSX or Windows) to make sure it is being allocated an IP address from the Netgear router. Can you tell us the Netgear router model number ? Just to make sure it is a router, with all the required functionality, rather than just a hub.
Your salvation may come with reserving IP addresses on your router for each computer. That way, they'll have fixed LAN IP addresses, you'll never get this issue and you'll be able to do whizzy things with sharing printers and scanners, etc. But we'll need to know the Netgear model to see if that is possible (almost certainly is on models in the last 3 years, if it has DHCP allocation).

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Message "another program on your computer would like to modify Firefox with the following add-on" appears every time a new user logs in... Bad problem

I have just deployed an image to over 500 workstations, and they are all deep frozen using deepfreeze.
When users are logging in, and open Firefox they are getting the message "another program on your computer would like to modify firefox with the following add-on:" Adobe Acrobat - Create PDF 1.2
Yes I know u can do a one-time click and allow, but we have potentially 50,000+ students logging into these PCs and it is unacceptable that they are greeted with this message rather than the Homepage.
This is very dissapointing, as we upgraded to the latest version of firefox in preperation for rollout, and then added some software like adobe.
The profile is kept in the default user, so everytime a user logs in, they will get prompted with the message, and this will always happen because we use deepfreeze.
I need a FIX ASAP from mozilla on how to disable this pop-up via Group Policy...
Not at all happy,
Sharpy

Hi,
One way you could try is to install Firefox on a fresh PC/image which has the same Adobe software versions installed as the clients. You may also have to install the same extensions as well as software for any additional plugins as on the clients. Start Firefox and make sure everything is okay. After that you can copy and overwrite the '''extensions.ini''', '''extensions.sqlite''' and '''pluginreg.dat''' files and probably the '''extensions''' folder and any supporting files of the extensions from this fresh profile, onto a client profile after temporarily disabling/unfreezing Deep Freeze. If everything is okay you can then push the changes onto the other clients via a logon/startup script after temporarily disabling Deep Freeze and then re-enable Deep Freeze.
[http://kb.mozillazine.org/Profile_folder Firefox Profile Folder]
[http://kb.mozillazine.org/Profile_folder_-_Firefox Firefox Profile Folder & Files]

Receiving message: "another device on the network is using your computer's IP address"; what should I do?

In the last two days I have received this message on my iMac: "Another device on the network is using your computer's IP address..." What should I do?

There are a lot of ways this can occur, but most common is from having devices setup and on a router for a long time and then adding devices and cycling the router. Devices that do not power cycle retain the old IP address. You can shutdown all devices, then power down the router, disconnect power so it is truly shut down, wait about five minutes then power up the router. Give it a couple minutes to capture a new IP address, then one-by-one power up the devices giving each a couple minutes to capture an address. That should then have all devices with unique addresses.

I keep getting the message "another device on the network is using your IP address; my IMAC is the only computer on the network; I do have an IPhone

I keep getting the message that another device on the network is using my IP address. I have no other devices except for an IPhone. What should I do?

Turn the iPhone off ... turn it back on again.

Get the message - another device is using the same address

I keep getting the message that another device is using the same ip address. I have to turn off my MacBook Pro from wifi and then back on again. Sometimes the wifi doesn't come back on for my MacBook Pro.
Running Mountain Lion. Thought all this hassle would be solved.

To follow up on what Thomas has said.
You have a device on your network that is using a fixed IP address in the range of addresses that your router assigns addresses from. You'll need to figure out what device that is and change its settings so that it gets a dynamic IP address assigned by the wireless router.
Or your MBP has a Fixed IP.
Or if you need certain devices to have Fixed IPs, like a printers which should always be assigned a fixed IP, then you need to assign those IPs out side the DHCP Pool range the router uses to hand out Dynamic IP but yet still in the total range of the routers IP address.

HT1766 I'm trying to update my first Ipad (versions 4.2.1). Device is recognised by the computer. Advise to upgrade to 5.1x given but then followed by the message that device is not connected to internet. Connection with upgrade server not possible.

Whilst connected to the internet (reading news and sending messages) I cannot upgrade my Ipad with an error message that my device is not connected to internet. Update server can not be reached?
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Ipad 1, version 4.2.1

I tried resetting the ipad, switched off wifi, checked date and time.

What do I do when I continually get the message 'another device on the network is using your computer's IP address' on my iMac?

Hwe continually get this message on our iMac even when other devices in the same room can access the network (laptop, iPad etc). We have tried using a fixed IP address and also an automatic IP selection but to no avail. Any suggestions,

What that means is you were forcing your Mac to always use the network address 123.456.7.89 since you had manually assigned that. Normally this would be fine, your router would check for active addresses in use and assign a different address to any computer or device trying to join the network. The problem could arise if your Mac is off-line and the router has already assigned the IP address to one of your other computers. When you tried to log in with your Mac you would get the conflict message that you have noticed.
Setting all computers to using DHCP will let the router handle the addressing.
I would check all of your computers and PC's. You may have more than one of your computers set to manually assign an address using that same IP address. Make sure you set all of them to DHCP only. Also, check if you have any other IP devices like a printer or NAS drive that is using static addressing. Those can cause the same issues.
It is prefered to use static addressing with those as it makes it easier to find them on the network and since they are pretty much always left on, the router knows they are there.
On your Mac go to System Preferences > Network > Advanced > TCP/IP:
What is shown should read:
Confugure IPv4
IPv4 Address
Subnet Mask
Router
Configure iPv4 using DHCP with manual address
Change that to "Using DHCP"
Apply the change and close the window.
I warn you, I've not yet received my first Mac and it's only an educated guess. I hope it helps.

Trying to set up my time capsule to my friends dsl modem so I can get wireless. I kept on getting message another device is using the same IP address, so I manually changed the IP address and now I have no Internet via DSL modem or wireless

Help with trying to set up my time capsule to my friends DSL modem, so that I can get wireless while staying at his place.

Set up your Wi-Fi network with your iPad, iPhone, iPad touch, or Mac.
http://www.apple.com/airportexpress/features/easy-setup.html

WIFI issue: error Another device on the network is using your computer's IP address

Since installing Yosemite I am kicked out of the network on a regular basis. Originally this only happened when on Skype which is bloody annoying but now it happens all the time. Each time I receive the error message:
Another device on the network is using your computer’s IP address
Is there anything I can to to fix this. For example I cannot find which other device is doing this.
regards
PP

If it on DHCP its a bit odd that you get that message(that your router rejecting giving you the IP its giving you kind of thing or your mac seeing another machine( a ghost)-which would be consistent(after all it nearly that time of year) There is a long thread on here with several wifi resolve solutions including the SMC reset(which people had to do for Mavericks so its not really something new. A lot of people seems to have been able to reset things and get a stable wifi and everything settles down for them.

Another device is using my IP address...I don't have another mac?

I am getting this message:
Another device on the network is using your computer’s IP address (IP Address).er’s IP address (IP address).
Try connecting again later. If you continue to have problems, change the IP address of this computer or the IP address of the other device. Contact the network administrator if you need more information.
Is this bad? Is this a security issue?

Out of the blue today, I started having this problem. All devices on my home network have assigned IPs. First my wife's Mac said there was an IP conflict. I was able to ping it when it was on, but when it was shut down, I was not able to ping that IP. Now my desktop and my laptop are doing the same thing. Cold reboots do not help. The router assignes IPs between 200 and 225 whereas my assigned IPs are below 125.. So even when I switch my laptop to DHCP, and get an assigned IP, I get the message that there is an IP conflict. Have rebooded the airport base that is the router and assigns IPs. In th emorning, I will turn everything off and restart one machine at a time to see if I can find a cupprit. Very odd.no network configurations were changed.
Paul

Another device on the network is using my computer's ip address

My computer is saying "another device on the network is using your computer's ip address". What does it mean?

Hello,
It means that another device on your network (wireless or Ethernet) has the same IP address as your computer.
An IP address is A Internet Protocol address, a numerical label assigned to each device (e.g., computer, printer) participating in a computer networkthat uses the Internet Protocol for communication.
If this happens you would need to change your the IP address of the device, you can check what device by going to your router admin web page. Details depends on what router you own.
You can check your PowerBooks IP address by going to system preferences and network. If you connect by Airport check the IP address of the Airport card, else check the IP address of the Ethernet if that's how you connect to the Internet.

I just bought mine last night and when i turned it on today it said another device was using my ip address. I have an iPhone is that what it meant?

I just bought my MacPro laptop last night and when I started it up this morning it said another device was using my ip address? I have an iphone is that what it meant

It probably means you've manually set an ip address of another device on your network to the ip address that your dhcp server wants to assign to your computer. Or, it means that a neighbor has connected to your network with a fixed ip address that your dhcp server wants to assign to your computer. Or, it means that you are really connecting to a neighbor's network and you've set your computer's ip address manually to an address your neighbor is already using for one of his devices.
Make sure that all your network devices are set to receive their ip Address automatically (dhcp). Restart your router and all connected devices to see if that clears up the problem.

My iPad is not charging even after rebooting and checking the charger on another device.

My iPad is not charging even after rebooting and checking the charger on another device.

So your charger works on another device just not on your ipad?
if so, make an appointment at your local apple store and have them check it out.

Safari of my Macbook (on WiFi) suddenly fails to connect to the Internet. A popup window message says another device on the network is using my computer's IP address.

But then there was still no Internet access even after I have disconnected all other home computers (a total of four including the Macbook and one iMac desktop. For simplicity, I shall categorically called them Mac hereafter unless otherwise specified. The Macs are operating on WiFi.).
The window message recommends changing the IP of either the Macs or the other device. The latter of course does not apply because I don't think the other device is one of my computers.
My questions:
(1) Why did that happen suddenly since the Mac and other computers on the WiFi was working fine in the morning (as well as days before) and then all of a sudden an unknown device is using my computer's IP? As far as I (we) can remember, we did not do any thing unusual this morning nor had we downloaded any special programs.
(2) How do I change the IP since it requires Internet acess to do it and since I can't access the Internet on the Mac?
(3) I am almost sure the problem is not caused by the Internet service because when I connected the Ethernet cable from the DSL modem to an old Windows PC, I got Internet via Internet Explorer. [I am actually sending out this message via IE on my PC.] However, when I cennected the Ethernet line from the modem to a WiFi router (Airport Extreme) and then connect the router and the old PC, I did not get Internet on either the Mac nor the PC. Similarly, there was no Internet on both Mac and PC If I connect Ethernet only between the modem and the router but not between PC and router. So, the question is whether a third unknown party has gotten hold of my Mac IP address and is trying to break into the Mac? Can it steal my personal info?
(4) How can I repair the Mac now and prevent future recurrences? Is changing the IP address the way to do it? (But like I said before I had tried but could not change the IP because I did not have Internet access on the Mac. Is there an alternative method?)
(5) I wonder if a computer's IP address remains constant if you don't change it. The reason I am asking this question is because the aforesaid window message on the Macbook--not sure about the iMac--shows a different IP address--a few numerical digits were changed--almost every time it pops up following every failure trial of mine to access the Internet. Was the Macbook trying to change the IP for me or was there some thing not right?

Re: Another device on the network is using your computer's IP address.
This message/problem was occuring intermittently for me in a household with two MacBooks accessing one Airport extreme. Rebooting the modem and router would only temporarily fix the issue for me, so I spoke with a friend who works for Apple and it seems that the Airport Extreme settings were at the root of our particular issue.
The router(Airport Extreme) recieves only one IP address from the modem and in order to allow it to share the IP address with two computers at once, the solution in my case was through:
Applications>Utilities>Airport Utility>Manual Setup>Internet
under Internet Connection- Select "share a public IP address"
under NAT, check the box for "enable NAT Port Mapping Protocol"
(this will allow the sharing of one public IP address with multiple devices)
if this is a new setting, then click "Update" and the Airport Extreme should reboot itself with new settings applied.
When all else is working properly, this is a satisfactory solution in my case.

Apple TV worked until today. Message says unsupported signal check your output device. I have checked hdmi cable with another device and it's fine. Put on a different tv and same message. Went out yesterday and bought a new Apple TV and same problem.

Apple TV worked until today. Message says unsupported signal check your output device. I have checked hdmi cable with another device and it's fine. Put on a different tv and same message. Went out yesterday and bought a new Apple TV and same problem.

Which TV do you have.
You may wish to try the following:
Press and hold the menu and the up button simultaneously on the remote for six seconds, the Apple TV should then begin to cycle through the various resolutions available to it at 20 second intervals.. If you see a picture appear up on your screen, use the remote to scroll down to the OK option and select it.

Message another device on your tcp/ip internet

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