A MAC address is a unique identifier for network adapters or network interface cards.

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How can I get the MAC address from my stolen laptop so the police can trace it?

A week ago my HP Mini 110 was stolen. I reported to the police and they asked me about my Laptop's MAC address, which I don't know or had never heard about before. Is there any way to get the MAC ...
-1
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2answers
4k views

How to bypass MAC address filters

I have a program that gets my MAC address, and it won't work with the real one; I need to clone it. The problem is that if i try to spoof it from regedit, the software will recognize it. I cannot use ...
1
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0answers
994 views

Internet Connection Sharing bypassing MAC Filter in Ubuntu Linux

My university gives me an internet connection by Ethernet, DHCP but they have installed MAC Filtering to allow only using my PC. I have a wireless router TL-WR340GD. which has MAC address cloning ...
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2answers
4k views

What's the MAC Address of my Ethernet adapter?

I have purchased a Dell Inspiron N5010 (with Windows 7). It works all fine but I need to know the MAC Address of the Ethernet adapter. I have tried IPconfig /all, but it does not show my Ethernet ...
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1answer
1k views

How do I get my original MAC address?

I am using Windows 7 Home Basic. My laptop's MAC address was changed by a hardware support person to facilitate my Internet connection. How can I get my original MAC address.
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2answers
721 views

Blocking or Disabling Rogue Routers

We have a medium sized network and from time to time something bad happens. Once it was a router configured to assign IPs via DHCP that did not match our network mask, thus making all clients unable ...
1
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1answer
345 views

How do I find the MAC address in Mac OS 9?

I've never used a Mac in my life – now I have to find out the MAC address of Mac OS 9. I can't even find terminal or console there.
4
votes
2answers
16k views

Create a virtual network interface using the iproute2 “ip link” command with a spoofed MAC address

How can I create a virtual interface similar to the following ifconfig command? $ sudo ifconfig eth1 hw ether 00:01:02:aa:bb:cc SIOCSIFHWADDR: No such device This does not work. I want to set ...
0
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1answer
842 views

why do I get a different MAC address using arp and ifconfig?

# ifconfig eth1 Link encap:Ethernet HWaddr 00:1e:8c:10:xx:xx # arp Address HWtype HWaddress Flags Mask Iface 192.xxx.x.x ether 38:72:c0:cc:...
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2answers
3k views

MAC address spoofing in Windows 7 - 00 as first two digits?

I've followed this guide on MAC address spoofing. I'm trying to change the MAC address for my wireless adapter. I seem to be able to change it when doing the registry edit, but only if the second ...
0
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1answer
268 views

Can the MAC address(es) of a Windows XP machine be found in a backup of C:\Documents and Settings\

I recently had a Windows XP laptop stolen I do not know its MAC addresses (wired or wireless) I have managed to retrieve its wireless MAC from the WiFi router it was attached to, but I have no ...
5
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2answers
40k views

How can I determine the MAC address for a NIC in CentOS without using ifconfig?

CentOS 5.5 One of my CenTOS systems recently booted with the following error: "Bringing up interface eth0: Device eth0 has difference MAC address than expected. ignoring." When I run ifconfig -a ...
6
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3answers
18k views

Finding router's WAN/External MAC address

I want to find my router's WAN MAC address. On the WEB UI, WAN MAC is hidden. SSH / Telnet is not available (password protected) on router. There is no labels/engravings on physical unit which ...
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1answer
1k views

MAC address based VLAN: How to get the MAC address of a newly attached device?

I am in a network that determines by the MAC address of attached devices to which VLAN the used switch port has to be set to. For regular devices that use DHCP the MAC address can be simply ...
3
votes
4answers
17k views

Changed MAC address of Wireless card being ignored?

I am attempting to spoof a MAC address on my wireless card (Intel(R) Centrino(R) Advanced-N 6205) in Windows 7. Since the Driver Properties dialog doesn't have an option to change the address, I've ...
0
votes
2answers
4k views

Can I change the MAC Address on my Airport Extreme WiFi Router?

I am trying to do some diagnostics on my Time Warner Wideband Internet connection. To do so I would like to spoof the MAC Address on my AirPort Extreme WiFi Router. I cannot find a way to alter the ...
0
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1answer
771 views

Another user in my network is using my IP and MAC address - what can I do?

These days I had problem with my internet connection. I have a static IP connection, but some time ago I couldn't access the internet. A friend helped me and we found out that the IP and MAC-address ...
0
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2answers
6k views

Theory regarding MAC and IP address in network packet and frame content?

Okay, network theory and protocol questions for you guys: Assuming a router is using NAT, is a device's MAC address every actually exposed to the Internet? Or, does the router transmogrify (wow, ...
0
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2answers
356 views

Using MAC address prefix AB:CD:EF

I'm trying to use tcprewrite to change the source MAC address of some packets. I deliberately chose the prefix AB:CD:EF that does not belong to any hardware manufacturer so that I can distinguish such ...
0
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1answer
1k views

Restrict users with regard to their MAC addresses. Is it possible with Squid?

I need to restrict the users with regard to their MAC addresses. Is it possible with Squid?
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6answers
1k views

On a switched network, why do unicast packets not addressed to me reach my NIC when I'm in promiscuous mode?

When I'm connected to a switch, the switch knows which MAC address belongs to which port. So even when I'm in promiscuous mode, why do I receive unicast packets that are addressed to other MAC ...
2
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1answer
813 views

MAC Address Convention

I need help understanding MAC address convention as described here. If I understand it correctly, then MAC address 00-27-C7-38-42-11: Has 00 as the most significant byte. Has 0 (zero) set in its ...
0
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1answer
974 views

no internet in browsers after cloning computer's MAC address to router

Looks like my ISP has a MAC address filter on their end, hence newly installed wifi router was being blocked until I did a MAC address clone from PC to router using in-built function in the router's ...
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5answers
6k views

A Utility to Spoof MAC addresses in OS X?

Is there a menu bar style tool, or maybe a GUI program that would allow me to switch / spoof MAC addresses for the Airport / WiFi connection on OS X?
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2answers
348 views

Is modifying our MAC Address a perfectly reversible operation?

Ok guys I've just read this page: http://www.irongeek.com/i.php?page=security/changemac But before I want to attempt anything, I want to ask: Is modifying our MAC Address (in the way provided at that ...
2
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2answers
242 views

Using a laptop with multiple static-ip routers

I use my Windows XP laptop with Wi-Fi at school, home, work and by my parents. Each of these has a different setup (one DHCP and the other three use different static IPs). Is there a way to attach a ...
3
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1answer
1k views

Need more than 32 wireless mac filters

Are there any home or small business wireless routers that have more than 32 mac address filters? I'm currently using a Linksys WRT120N with a 32 address capacity and 32 is not enough.
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4answers
6k views

How to restore MAC address in Linux?

I have changed my MAC address in my Linux machine using ifconfig. Now the problem is I have not saved my original MAC address. I want to restore it without rebooting. Is there a way to do it?
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3answers
2k views

Permanently spoof MAC address on OSX

I'm changing my MAC address for my MacBook's AirPort because the list of devices my router can hold (only 25!) is full. Therefore, I used ifconfig and the tool ChangeMac. Everytime I restart the Mac ...
5
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1answer
6k views

Do MAC addresses on virtual machines mean anything?

MAC addresses on virtual installations such as VirtualBox are not connected to hardware. Do they have any absolute meaning, and are they registered somewhere, the way hardware MAC addresses are ...
2
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2answers
7k views

How to find MAC address of a machine in my network

At work, we have a network with internal IP addresses given to machines. How can I find the MAC address of machines in my network whose IP address is known to me? Also how do I find the MAC address ...
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1answer
3k views

Spoof MAC address in Windows 7: Bypass

I am trying to spoof the MAC address of my new Win7 laptop. To do so I tried specifying an alternate value from the Device Manager which took no effect. I also tried from the registry, as per other ...
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1answer
1k views

Firewall rule in Windows 7 that allows MAC Address Proxy Authentication

I'm using Windows 7 Ultimate and I', using Windows Firewall with Advanced Security. My proxy server uses MAC Address as it's authentication scheme. When the firewall is in disabled state, I can ...
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2answers
259 views

Why does my DSL modem list more than one physical address?

OS : Windows XP 32 Modem: Huawei MT882 What little I know, physical address is typically unique for a given network adapter. Why then does ipconfig /all give me more than one physical address listed? ...
3
votes
1answer
7k views

How can I change the MAC address of Microsoft Loopback Adapter?

I am trying to designate a MAC address for MS loopback adapter. Installation is fine. I see in device manager, the adapter and in advanced tab, I enter the mac address I desire. But when I do in cmd ...
32
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2answers
16k views

Are MAC addresses unique when coming out of the factory?

According to Wikipedia: A Media Access Control address (MAC address) is a unique identifier assigned to network interfaces for communications on the physical network segment But how unique are ...
0
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1answer
1k views

Copy Mac Address into Clipboard help in Windows 7

Given the batch script below. How would I be able to give me a MAC address with no dashes and add a "D" in front of it? So when I go and paste, it has a MAC address that starts with a D and there ...
0
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1answer
1k views

tools to hide ip and mac address

Are there any fast and free software to: Hide my IP address without proxy server as it changes the layout of the web site and makes it not fast at all. Dynamic MAC address generator to change it ...
3
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2answers
8k views

Change MAC address of a wireless network adapter

Okay, so I have officially tried every solution to an issue I can think of. I have even tried 3 distributions of LINUX, with still the same issue. [even bought Windows 7]. I have been trying to ...
118
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2answers
28k views

How to avoid exposing my MAC address when using IPv6?

On my Macs, each IPv6 address includes the MAC address of a specific computer (not of my router). Sites such as ipv6-test.com not only show it, but even tell me it belongs to an Apple computer. This ...
0
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2answers
789 views

Cannot change MAC address on notebook

I've tried to change MAC address on a notebook Toshiba Satellite A200-14E Windows Vista without success. I've tried to change it via Network settings - Adapter settings. I've set Network address ...
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5answers
28k views

How can I find out my WiFi adapter's MAC address on Ubuntu Linux?

What command can I enter in a terminal to find out the MAC address of my WiFi adapter?
0
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1answer
2k views

Intel Ultimate-N mac address change [duplicate]

I want to change the MAC address of my laptop. My laptop has Intel Ultimate-N 6300 wireless card. Although I've managed to change the MAC address in Linux, I still cannot change the MAC address in ...
4
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3answers
13k views

how to get MAC address for wireless access point?

How can I get the MAC address for the wireless access point in Ubuntu?
4
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5answers
18k views

How to find MAC Address of a PC without powering it on?

How to find MAC Address of a PC without powering it on?
2
votes
1answer
394 views

What's wrong with my MAC address?

I have a D-Link DSL-2650U router, and exactly one computer on the network. For reasons of port forwarding I want to give my computer a static internal IP address, so that I don't take the chance of ...
0
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2answers
5k views

How to find who is connected to my computer from MAC address?

When I type in the command netstat -an into cmd, I get information that one of my ports is opened from some MAC address. My qestion is how to close that port and how to find from the MAC address what ...
3
votes
2answers
6k views

How do you change your Airport or Ethernet MAC address in Mac OS X 10.6?

I have a MacBook Pro and would like to set a custom MAC address for either my Airport WiFi card, or Ethernet port. In older versions of Mac OS X, you could do it like this: $ sudo ifconfig en0 ether ...
0
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4answers
16k views

What does modem MAC address mean?

I have a Motorola modem, and when I connect to 192.168.100.1 (modem IP) I see 5 MAC addresses: HFC MAC Address, CPE USB MAC Address, Known CPE MAC Addresses (4), of which one has status SELF and ...
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1answer
234 views

Onboard Ethernet suddenly stopped working to router

Yesterday I had a sudden problem with my Ethernet connection to my router. My computer is a Pentium 4 with Windows XP SP3 running on it and it was working fine earlier in the day, but yesterday night ...