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

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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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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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Send packet (frame) with different 'Sender's MAC'?

I was just studying the Network+ book where it explains the contents of a Frame using blocks to represent a set of bits. Moving onward, it states that the first 'block' is the Recipient's MAC address. ...
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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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59 views

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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Layer 2 switching or Layer 3 forwarding?

I have a wireless router installed at my home (provided by ISP). Scenario: Router IP: 192.168.1.1 My Machine IP (X): 192.168.1.2 IP of machine Y: 192.168.1.3 Now when I ping Y from my ...
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283 views

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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998 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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278 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.
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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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How to find the MAC address of access point that working on a roaming system

I’m working in very big oil and gas company. We have many many access points in our offices, each access point broadcasts 3 SSID’s. The access points with roaming system. On the back of each access ...
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Defaultgateway do not detect MAC-addresses

Today I was experimenting a bit with the user interface of my cisco router that is the default gateway of my LAN-network. I have two computers and a couple of smartphones atached to it trought WIFI ...
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How Does a Router Map Inbound Traffic to LAN Nodes? [duplicate]

Imagine a home network of several computers connected via router to an ISP. Computer A wants to request a webpage from a remote website, 10.234.12.8. The address is not in its ARP cache, so it ...
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75 views

IPV6 and MAC discovery

Is there a way to get the MAC and IPV6 Global link address for the network, just as ARP does with IPV4 in Ubuntu. I tried to retrieve IPV6(Link Local Address) using THC-IPV6 tool. But retrieving MAC ...
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How to block the MAC Address in Huawei HG532e wireless router?

I am using a Huawei HG532e wireless router and I would like to block some of the smart phones of some of the workers who are no more working with us. Please help me to do this work as early as ...
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567 views

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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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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What kind of hardware information is accessible for computers on a network?

If a computer is connected to say, your job's network what kind of hardware information can be retrieved. More specifically can an administrator get a list of all the CPU's and there serial ...
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468 views

Spoofing MAC address to match other device [duplicate]

Possible Duplicate: What happens when two PCs have the same MAC adress? At my school, there is a WiFi network where you can register up to one computer or phone. I, however, wish to connect ...
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56 views

MAC filtering, How to auto log in to a webpage?

My building provides internet access. But before you can use it, you need to browse to a website. From there you are redirected to the building's router which asks you for a user name and password, ...
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888 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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558 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 ...
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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 ...
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Can a Virtual PC emulate a mac address for the network card too?

Can a Virtual PC emulate a mac address for the network card too? It probably is possible but I think the Virtual PC / VirtualBox / VMWare / Parallel, all probably won't support it as the mac address ...
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WiFi Hotspot MAC Address [closed]

Say I have a network consisting of multiple computers where (1) access to the network itself is regulated based on the MAC address and (2) access to the internet is protected by a proxy. Say now I ...
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648 views

Multiple mac address connections from the same device

My internet speed dropped from aobut 90Mb/s to 0.5-2Mb/s. Only one computer seemed affected. So I was been looking through the device list on my Linkysys Smart Wi-Fi router and came across something ...
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Spoof MAC without limitation in Windows 8?

I am able to change my MAC to anything in Kali Linux, but not in Windows? It needs to be changed to 50:b7:c3:3d:1c:b6. I tried using SMAC and no luck. I heard there were limits on what I can change it ...
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Windows - MAC address whitelist on wired network?

In Windows (XP or 7), is it possible to configure either Windows, a software firewall, or network cards such that the computer will only communicate with specific known MAC addresses (e.g. the MAC ...
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Two wireless extenders with same mac address…How to assign IP address dhcp

I have two wireless extenders, and they both have the exact same mac address (same make and model) Now, they work fine in the network, I just wanted to know how can I assign them specific IP ...
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276 views

Spoofing Windows 7/8 Mac address with 00: manufacturer?

As I am sure everyone knows starting with Windows Vista, you are not able to spoof MAC address to something that starts with a 00: For a project I am doing I have to spoof it as starting with 00: I ...
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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 ...
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Why would results differ from trying two different methods to get a MAC address?

While trying to find MAC addresses of networked machines, two different methods were used and different answers were received: Ping the machine name using the command nbtstat -a xxx.xxx.xxx.xxx (x ...
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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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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 ...
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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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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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What's the limit of a home router's MAC address table?

I am considering creating a large LAN (possibly greater than 255 computers) using home wireless routers such as Linksys WRT54G as switches (DHCP off). What, roughly, is the size or limit of the MAC ...
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How can I telnet from Windows to my server by MAC address?

How can I telnet from Windows to my server by MAC address? C:\Users\Asep>telnet D4:CA:6D:46:C9:98 23 Connecting To D4:CA:6D:46:C9:98...Could not open connection to the host, on port 23: Connect ...
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What is this device?

I have a DSL modem with WiFi, and on the list of devices connecting to it, there is one device that is foreign to me (10.163.55.254 in the screenshot below). How can I track down what it is and where ...
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How do I find the MAC address of my laptop?

I tried to find out the MAC address in my notebook by Run → cmd → config /all but I didn't find it there. How do I find the MAC address of my laptop?
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How does a router find the MAC address of next hop router?

I know that in an Ethernet LAN, the ARP protocol is used to get a MAC address from an IP address. How does my router get the MAC address of another router on an external network if ARP is not ...
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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 ...
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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 ...
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What is meant by MAC address “Spoofing”

Why is MAC address Spoofing called spoofing, rather than MAC address changing? If the network sees your MAC address as whatever you spoofed it to, doesn't that practically meant you have completely ...
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What will happen if a bridge got a wrong mac record?

Let's say there is host H1, H2, switch S1 S2, and S3, bridge B1, B2. It is connected like this: H1 - S1 - B1 - S2 - B2 - S3, | H2 H2 is sending frames to H1. Then, ...
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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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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 ...