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

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103
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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 ...
8
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8answers
23k views

How do I change the MAC address of my network card?

I have a local network in a Windows system where the Admin gives permission to the PCs by their MAC address. But he is on vacations and I have a new PC. How can I change the MAC address of my new PC ...
72
votes
5answers
969k views

How do I locate the MAC address of my computer?

I am unable to locate the MAC address in a new computer with Windows 7. I've tried ipconfig /all in the console to which I got no items match your search. I also tried getmac. A screen flashed very ...
9
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1answer
4k views

Is your MAC address revealed when you hit up a website?

When you hit up a site, such as cnn.com, does the TCP/IP packet contain the MAC address of your network card? Could cnn.com theoretically record my MAC address?
5
votes
4answers
6k views

Is it possible to change my MAC address?

The wikipedia article on MAC address mentions that it is stored in the ROM of the NIC. How can the MAC address be changed then?
0
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3answers
299 views

Duplicate MAC but different IP on home router

Would it be possible to have duplicate MAC addresses but different IPs on a home router? My questions are listed below. I don't have computers with the same MAC. The second connection displays no ...
48
votes
6answers
20k views

Is looking for Wi-Fi access points purely passive?

Say I carry a Wi-Fi enabled phone or laptop through an area where there are WAPs. Assuming that I don't actively try to connect to them or otherwise interact with them, is it possible for the owner ...
10
votes
2answers
20k views

Proper way for changing MAC address in a linux VM?

I tried to change the MAC address in a ubuntu VM (virtualbox), but after that it threw lots of errors during boot, and then I had no internet connection. Then I saw that the interface was renamed to ...
7
votes
9answers
35k views

Can a MAC address be traced?

Can the MAC address of a computer be traced to the serial number of a computer? I have the MAC address that is trying to break into my wireless router. Knowing the serial number of the computer would ...
16
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2answers
13k views

What happens when two computers on the same network have the same MAC address?

I was reading an article on WEP cracking, which said that filtering MAC addresses was not enough, since there are tools to change what the computer reports as its MAC address. This made me wonder ...
2
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2answers
2k 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 ...
1
vote
3answers
18k views

Spoof MAC address from IP command

I'm trying to spoof my MAC address on a modified version of Linux (Android). The main problem is that because it has been stripped down, the ifconfig command has been taken out, and I only can use the ...
0
votes
2answers
910 views

Discover the public ip of a network without being connected

Let say, I'm next to a network and can see the traffic (with airodump or similar tool) but can not decipher it (because I am not connected on the network). Is it possible to discover the public ip ...
11
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7answers
5k views

Why is MAC-based authentication insecure?

Most wireless routers can use MAC-based authentication as part of their overall security scheme. It seems like a good idea, but I've heard that it is very ineffective, because it's easy to spoof MAC ...
4
votes
3answers
2k views

Given a PC's MAC address, can I find its IP?

Is there a way to get the IP address when all you have is the MAC of an item?
3
votes
1answer
6k views

Assign IP's to certian mac addresses in dd-wrt

I have a Linksys WRT54G/GL/GS that I am running DD-WRT v24-sp2 (10/10/09) vpn - build 13064 on it and for the life of me I can not find a way to assign ip's based on Mac address. Basically I have a ...
2
votes
2answers
857 views

Does a switch know the mac address of other port of a bridge?

Let's say we have switches A and B, they are connected by bridge C. Does A knows about the mac of nics connected to B? Is it true that every time when nic on A want to send a frame to nic on B, the ...
1
vote
0answers
4k views

Can I track the MAC address of my stolen laptop by service tag number?

My Dell Vostro laptop was stolen five days back. Many valuable documents were on it, so how can I trace the MAC address of my stolen laptop? Can the MAC address be traced through the service tag ...
1
vote
2answers
840 views

Why does my MAC address reset after reconnecting?

I use Ubuntu 12. I'm changing my MAC address with ifconfig wlan0 hw ether xx:xx:xx:xx:xx:xx, which works. However when I restart my connection, my computer resets the MAC address to my original MAC ...
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2answers
2k views

Wifi password VS MACs filtering - in terms of speed vs security

Background First I need to say that I know about how better it is to secure the wifi network even with WEP , than to not secure it at all, and I know there is a thread asking a similar question like ...
1
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2answers
11k views

Is my MAC address public when browsing the Internet? [duplicate]

Possible Duplicate: Is your MAC address revealed when you hit up a website? Can anybody see my MAC address when I'm on the Internet? Also, where can I check my MAC address?
1
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4answers
14k 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?
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3answers
3k views

MAC address spoofing not working in Windows

In Windows 7 I tried setting my MAC address by changing it via adapter properties (Locally Administered MAC Address), but ipconfig /all still shows the old address, even after rebooting. Any hints?
0
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0answers
149 views

How to find the MAC addresses of an unsecure network, on Windows, using the easiest steps?

As I try to prove that an insecure network, even with MAC filtering feature, is a bad thing (link here) , I've tried to find out the easiest way to do so. I'm trying to show that it's easy to enter ...
0
votes
2answers
893 views

Connect to the internet by changing the mac address

My ISP allows only one computer so I have to change the mac address. On the other computer I use ubuntu and I've changed my mac address with both ifconfig and macchanger. The internet still doesn't ...