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

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Is personally identifying info on user hardware sent through internet?

I've read here that it's possible for a website to use cross site scripting to pull your router's MAC address without your permission. This can then be used to determine your location through Google ...
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6answers
183 views

Can I create an Ethernet network without using IP

As I understand from the ISO-OSI model, MAC addresses operate on a different layer than IP addresses. This is clear to me. I can accept that Ethernet (LAN) just does not make use of IP addresses to ...
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383 views

How to get a Linux MAC address from a Windows machine?

i have a two systems, one Windows, one Linux. Both are connected to a local network. How can I get the Linux MAC address from Windows?
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518 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 ...
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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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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 ...
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483 views

Will I experience any issues if I change my laptop's MAC address(es)?

I'm always worried about anonymity and privacy, and just now I realized that some programs have access to the MAC address (and actually do it), eg: Dropbox. So I was wondering if changing the MAC ...
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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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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 ...
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347 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 ...
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How to bind IP address to MAC address in Windows XP?

I want to bind IP address to MAC address on my computer, how to do it?
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MySQL MAC Address Authentication with freeRadius

I have freeRadius up and running with the mysql extension. Currently I am authenticating devices using their mac-address which is stored in a text file (as per http://wiki.freeradius.org/Mac-Auth). I ...
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Does a USB modem have its own MAC Address?

My USB modem is now showing its MAC address in ipconfig /all. So does that mean that a USB modem has its own MAC address?
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What's the difference between wlan.sa, wlan.ra, wlan.ta and wlan.da?

Tshark/wireshark (CLI) has several fields to display for WLAN, including these four (+ description from manual): wlan.sa: Source address wlan.ra: Receiver address wlan.ta: Transmitter address ...
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380 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 ...
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1answer
353 views

linux software to query the skyhook database

I'm a Ubuntu user. I'm looking for some software which will query the Skyhook database with the MAC addresses of all the wifi hotspots in range of my computer and display the results. I'm looking for ...
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1answer
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Do laptop docking stations have their own MAC addresses?

My laptop has an ethernet connection, and there's another on the docking station. Can I connect using both at the same time? Will they have different MAC addresses? I'm assuming the ethernet port ...
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Change MAC address for TEW-444UB wifi USB connector?

The free wifi networks in the public libraries where I live only allow 2h/day share. They use the MAC address to check if a user has used up his daily quota. To bypass this limitation, I'd like to ...
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A Printer that has multiple MAC Addresses?

I have a Lexmark printer that for some reason shows multiple MAC addresses when its connected to a switch. Thats so weird. Anybody had the same problem? How can I solve it and how come it has ...
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1answer
592 views

Can an Intel 82577LM Gigabit Network Connection be spoofed?

I need to tell someone my MAC address imminently so I can be added to their router, but I am not at my computer. My laptop is a Dell Latitude E6510, running Ubuntu 12.04 with an Intel 82577LM ethernet ...
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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?
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223 views

Find some access point IP Adress from Access point Mac address on the internet?

Is there any router or database which can we access to put some access point or router MAC Address and get IP address? Or i just think the mac address changes when a packet leave a router on the ...
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Accessing the physical IP address of a computer on my network that is no longer available

I'm trying to find out how to access the IP address + MAC code of a computer (macbook pro) that I once had on my network at home. Does terminal store the 'connected' or 'linked' computer ID or IP of ...
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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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638 views

How to use the same internet connection over two machines with different MAC addresses?

My service provider does some binding to my Ethernet MAC address. So, I am not able to use the connection on a second machine that I need to use (I need to use both the machines, though not at the ...
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Finding the external (PPPoE, WAN) MAC address of an ADSL router

My ISP is Orange Internet, I have recently ditched my crummy "livebox" and moved to a more stable BT Business Hub with the firmware flashed back to the original SingTel ROM. The thing works great ...
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Is MAC compulsary for a NIC?

Is it possible for a NIC/ network adapter to communicate with internet if it is not assigned a MAC address ?
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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 ...
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Is there any harm in changing the mac address of my LAN adapter?

My internet provider has done static binding to thee MAC address of my adapter. Now I need to use the same internet connection on another machine also. So, I figure that one way of doing that is to ...
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How do the routers communicate with each other?

Let's say that i want make a request a to a web page which is hosted in Europe (i live in USA).My packets only consist the IP address of the web page, first the domain name to ip address ...
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911 views

Easy way to get mac address of network card

I use a lot of scripts that involve the Mac addresses of my network cards. Is there a file I can read or a command that I can use to JUST get the Mac address? I don't want any headers or anything, ...
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How should I reserve IP addresses for my home LAN?

My Netgear router supports MAC-based IP reservation, and I'm setting up my very first home LAN where I want multiple Ubuntu servers to be given dedicated IP addresses. This is a consumer-grade router, ...
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209 views

What does `ec` mean in `HWaddr ec`?

When I do ifconfig on my laptop I get HWaddr ec and than an address, this is next to eth0. Note that my IPv4 address only appears next to eth1 so I assume my laptop uses the eth1 network interface. I ...
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What does `Type: IP (0x0800)` in the Ethernet II part of a ping packet mean?

If I ping to another pc in my network I send a packet that consists out of an ICMP part, a IPv4 part and a Ethernet II part. I can see this using the packet analyser 'wireshark'. Now the Ethernet II ...
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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 ...
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Is the MAC address used on the DLL layer unique throughout the world for a device, lets say this computer?

Is the MAC address used on the DLL layer unique throughout the world for a device, lets say this computer?
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How to find MAC address of a mobile phone which is in range of my Wi-Fi network but not connected

It is clear that some big malls are tracking some Wi-Fi enabled mobile phones. How can it been done? I have the similar issue: How to get the MAC address of a mobile phone when it comes near to my ...
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Is it possible to sync specific router settings across multiple routers?

I recently purchased a second Linksys wireless routers set up on the other side of my home and I am wondering if it is possible to somehow sync particular settings between the two? For instance what ...
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Discover MAC address of wired computer

I would like to know the MAC address of a running computer which is directly connected to my own laptop with a wired cable (ethernet to ethernet). It has no DHCP server on it and I don't know its ...
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699 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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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.
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Discover MAC address

I've to setup a bunch of servers, and I need to discover their MAC addresses with the following setup: MacBookPro >----------< Server The Macbook Pro is directly connected (not behind a ...
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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 ...
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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?
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arp command returning weird info for Apple routers

When I use arp -a command, my two Apple routers (Extreme and Express) return weird results, unlike my other results. The IP address isn't a LAN IP address like the other results and the MAC address ...
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930 views

Planetlab and scapy: MAC address to reach destination not found

Using the minimal Fedora 14 distribution provided in PlanetLab, I'm forging packets through Scapy and sending them with tcpreplay. I thought I had installed all the necessary packages to run scapy ...
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748 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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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 ...
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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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Is is possible to change MAC address of a WiMAX USB adapter?

Wondering if it is possible to change the MAC address of a WiMAX USB adapter (read WiMAX, not Wi-Fi) manufactured by Motorola, ZTE, Intel etc. I've tried a few tools that did changed the MAC address ...