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

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If I format a machine that's running Ubuntu and install Windows, will the physical network address change?

My ISP binds the access to the physical address of my computer. I bought a new one yesterday and I had to call them to tell them the new physical address. Will it change if I format the computer and ...
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How to find IP address of a DNS server

I'm a CS student and currently taking a (basic) course in information security. I was given an assignment which required me to analyse a given .pcap file using Wireshark and obtain information on the ...
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185 views

Are the Bluetooth and Wi-Fi MAC addresses assigned in the same address space?

Are the MAC addresses of Wi-Fi, Ethernet and Bluetooth devices assigned in the same address space? Or are MAC address unique irrespective of the physical layer? Is there a possibility of MAC address ...
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Can my SSH session be detected by sysadmin?

My friend gets faster internet in my university as he has some research scholar facilities.Our sysadmin has made sure this feature can be only accessed by a few machines with a particular MAC ...
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649 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 ...
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745 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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2k views

How can I block a computer from my linksys router by IP or MAC address?

How can I block a computer (not on Wireless) from my linksys router by IP or MAC Address? I am using a linksys WAG200G.
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How do I find out the Mac Address Firefox submits for Geolocation?

I moved, but have the same router and cable box. Now when I visit Google Maps it still shows my old location. I went to the SkyhookWireless update page to update my Mac Address with my new location. ...
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284 views

How do you get the Mac-address of a Networking Card in Windows?

I'm running XP SP2 and need to get the MAC address of the card running on this machine. Where do I get that from?
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118 views

Blacklisted MAC address for modem

I currently lease a router for High Speed Internet from Comcast. I have just purchased my own router online from Ebay to avoid monthly rental charge. The ebay-purchased router is the same make and ...
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142 views

Find MAC address of laptop of stolen laptop

Is there is any way to find MAC address of stolen laptop? I previously use my Facebook and email account on the machine. Can I extract my MAC address from email of Facebook account. Give me technical ...
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58 views

Can a website tell what device you're using? [duplicate]

If I were to visit a website on different occasions and from different IP addresses but from the same device, could a website potentially tell? If so, would deleting cookies prevent this?
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39 views

Router and Switch MAC Address

There is a MAC address for each router and switch interface. But, is there a MAC address that represents the whole device?
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227 views

Mac spoofing for virtual machine to trick my university's IT system

I need help in setting up Oracle's VirtualBox port forwarding and/or mac spoofing. I feel it's important to add that my knowledge is very limited in this field and that my question could even be ...
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183 views

Bridge-mode networking and virtual network adapters

Say I have physical network adapter eth0 on my host machine and VirtualBox virtual machine with bridged network. Host and virtual machine have different IP addresses in the same network. I can easily ...
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30 views

Vendor devices produce limitation by MAC address?

Maybe it is silly, but I wonder if the first 3 hexadecimal values in MAC address represent vendor id (in 01:23:45:ff:ff:ff it is 01:23:45), is there a limit of 16777215 (ff:ff:ff) devices per vendor?
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Why is the IP and host specified in the /etc/hosts not pinged as expected?

I have an entry in my /etc/hosts file which points to each host on my LAN. I've completed specified all my hosts and corresponding host mac addresses in my Time Warner supplied router. I've created ...
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How many bytes of a WLAN packet do I have to examine to extract MAC addresses?

How many bytes of a 802.11 (WLAN) packet do I have to examine to be able to extract source, destination, receiver and transmitter adress from the header? This image suggests the header length of a ...
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15k views

How to get an IP address from a MAC address? [duplicate]

I have an ipscanner, but not every device is showing up. If I know a device is on the LAN, and I know its MAC address, how can I get it's IP address?
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550 views

How to share network connection (without mentioned issues) between tho computers with the same MAC address?

Well, I'm using a network connection where IPs are provided by DHCP locked with MAC addresses of the machines. As there are a lot of computer and other devices connected, there isn't enough addresses ...
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233 views

NAT on MAC-filtered network

My ISP (Hyperion S.A.) provides internet using a UTP cable with MAC filtering. I'm trying to set up a router so that I can connect multiple computers to the network. Most computers would connect ...
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254 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 ...
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3k 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 ...
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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, ...
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305 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 ...
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986 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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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? ...
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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 ...
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943 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 ...
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How reliable is changing the mac address in /etc/network/interfaces?

I'm running ubuntu server 10.04 If i change the mac address by adding (in /etc/network/interfaces) hwaddress ether 12:34:56:78:9A:BC How reliable is this? Can someone still determine my real mac ...
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How do I find out the MAC address of my Wi-Fi card in Windows 7? [duplicate]

Possible Duplicate: How to locate MAC address in Windows 7 How do I find out the MAC address of my Wi-Fi card in Windows 7? Is there some screen in the GUI I can look at? Or something in a ...
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136 views

Office 2010 evaluation registration

I would like to evaluate Office 2010. The thing is that the installation and registration is executed online. However, when I recover my laptop to its original factory shipped status it seems that I ...
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WiFi IP filtering?

Is it possible for a WiFi host to filter WiFi service by a computer's local IP, similar to how it's possible to filter WiFi clients by MAC Address?
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Prevent traffic to mac address using ebtables

I have an interface on a remote host: 2: eth0: <BROADCAST,MULTICAST,UP,10000> mtu 1500 qdisc pfifo_fast qlen 1000 link/ether 00:05:68:02:68:dd brd ff:ff:ff:ff:ff:ff inet 192.168.3.1/24 ...
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avoid sock puppet detection(creating two account) in a site

some sites block your account if they detect a sock puppeting (creating more than one account for one person). Somehow when you create an account**(A)** ,then reinstall your system and create an ...
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51 views

Cisco gear - finding mac address of a device based on Ip address?

Say, I have some devices connected to cisco routers. I want to be able to query an api or something using an IP address of one of the devices, and receive back it's mac address. Is this possible? ...
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clarifying mac adress validation using a wireless router

I have access to an ethernet port which requires a mac address validation and the system only allows one value to be registered at any given time. If I use a wireless router and register its mac ...
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1k views

PPPoE in Linux Mint 16

I use a broadband connection in windows 7 to connect to internet. I use a spoofed MAC id on the same Windows 7 laptop because my internet is MAC binded to my desktop computer. Now I am trying to ...
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683 views

Use multiple devices with an ISP with captive portal

Here are the facts that will help you understand the scenario: The ISP provides wireless broadband. It gives a device(installed on the roof) from which a LAN wires runs to your computer. The ISP ...
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296 views

Query MAC address of Powerline Ethernet Adapter

I have a computer connect to the Internet using Powerline Ethernet adapters in this fashion: {Internet} --- [Router] --- [Powerline Adapter A] +++ [Powerline Adapter B] --- COMPUTER Where --- is an ...
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Does a network bridge maintain the topo a bridged lan?

As the title suggest. Let's say we have switch A, B, C and A connect to B with bridge D, and B to C with E. A <--> D <--> B <--> E <--> C Does D know the mac of nics ...
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139 views

Packet count per mac address on wireless network

I'd like to get to know how many packets get transferred to a certain MAC address in my wireless network, protected with WPA2. I'm not at all interested in the contents of the packets, I'd just need a ...
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508 views

If my router has a MAC filter, does that mean that a laptop with its wireless address registered cannot connect via Ethernet?

Here is the situation: I have a router that has been hijacked/hacked recently and we're attempting to up the security. Whilst I know MAC address filtering can easily bypassed, I'd like to clarify one ...
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Trying to find MAC addresses across a network

When using nbtstat -a (IP address), will it return the true MAC hardware address of the machine?
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108 views

Is my MAC monitored? [duplicate]

Possible Duplicate: Is your MAC address revealed when you hit up a website? Is the MAC address traceable to the ISP? Or any website? If so can we hide the MAC address from a second person? ...
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265 views

MAC address ends with FF:FF:FF

My PCs MAC address ends with FF:FF:FF. I am little confused about this address. As per my knowledge MAC address is of 12 Hex digits (first 6 correspond to Company and second half to a unique NIC). And ...
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Can't connect after changing routers MAC address

I change my routers mac address regularly to change IPs so I can log into my different paypal accounts with worrying about getting them linked. My IP is dynamic, but has a long lease so doesn't ...
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708 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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Change MAC Address on Windows 7 - BootCamp (Macintosh)

I need to change my MAC address on my Windows 7 partition on my Macbook Pro. I have tried changing the registry value on my Windows to spoof my address, but that didn't work. I have also tried to use ...
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Why does internet get disconnected after I change mac in Kali Linux?

I have written this script to change my mac in Kali Linux: ifconfig eth0|grep HWaddr ifconfig eth0 down&&macchanger -r eth0&&ifconfig eth0 up ifconfig eth0|grep HWaddr The problem ...