Tagged Questions

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

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1answer
18 views

Can I have two MAC addresses which only differ by the “local” bit?

I have two NICs on my PC. One is the built-in wired Ethernet controller, another one is the plugged-in USB-Ethernet gadget. For the latter, the MAC address is auto-generated by the Linux driver. I'd ...
13
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9answers
2k views

Why Ethernet/MAC addresses are needed?

I don't understand why Ethernet MAC addresses are needed. Can't all computers just be connected to the unified network and use IP addresses to communicate? For example, there is a following mechanism ...
1
vote
1answer
18 views

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 ...
2
votes
0answers
79 views

How do MAC addresses get burned into devices during manufacturing?

I'm interested in the steps necessary to manufacture an IP-capable device - say an Ethernet card. Manufacturing the hardware is pretty straight forward since all of the devices are exactly the same ...
0
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0answers
19 views

Program to monitor network usage and perform system functions accordingly

Is there a program out there that monitors network usage, and then can execute system network functions upon a specific network change. For instance, I would like to monitor the download amount, once ...
0
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0answers
11 views

Synology DS214se - Possible to find MAC addresses of connections?

I need some help to find the hardware addresses of earlier connected computers. Some detailed log file or something Can i do this somehow ?
1
vote
1answer
44 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 ...
0
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1answer
27 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?
0
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0answers
28 views

MAC spoofing error encountered

I'm somewhat new to Linux (using Ubuntu 14.04), and I'm playing around with MAC address spoofing. I had it working for a few days, to where I could go into the command line and use ifconfig to change ...
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3answers
51 views

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 ...
1
vote
1answer
28 views

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 ...
0
votes
2answers
30 views

How does MAC Source Address Learning work with regards to hubs?

On my previous assignment for a networking class, I compared answers with a classmate regarding Source Address Table for a problem that had 3 devices connected to a switch. Device A + B were ...
0
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0answers
15 views

Does iOS 8's MAC address randomization give a random MAC address once connected? [migrated]

iOS 8 is now implementing MAC address randomization, where it randomizes your MAC address to networks while searching for networks. One article describes it as: One of those features, which is ...
1
vote
1answer
317 views

How to permanently change (spoof) the MAC address in Kali Linux (Debian)

I use the program 'macchanger' to change MAC address. However, I have to put down an interface (wlan0) and then invoke Macchanger and then bring the interface up again. I would like to have a way I ...
-3
votes
1answer
36 views

Giving MAC address to the IT dept

If I want to use Public wireless at work place with my iPhone, I must give the phones MAC address to the IT department. Is it recommended to do so? What can they access with the MAC address? All my ...
0
votes
1answer
24 views

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 ...
0
votes
2answers
55 views

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 ...
0
votes
0answers
92 views

Windows 8 Force MAC Address Spoof

Just to make this short, I've tried almost everything I found on Google to spoof my MAC addres (Registry, SMAC, NetworkAdress in Adapter Settings, etc.) and none worked. This is because of something I ...
0
votes
1answer
33 views

How can I filter my home network?

I live in an apartment with one roomate. They have a monopoly, as the complex actually has it's own special ISP they offer...and they restrict other, better providers like Verizon, Charter, and so on. ...
1
vote
0answers
68 views

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 ...
1
vote
1answer
56 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 ...
0
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0answers
38 views

/etc/ethers is not being read by dnsmasq

I recently configured dnsmasq on Raspbian, and everything was working perfectly except that /etc/ethers wasn't being read (yes, I did uncomment read-ethers and remember to restart dnsmasq) - the ...
1
vote
2answers
1k views

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 ...
0
votes
1answer
88 views

Know the MAC address in the network without touching the router

I'm new to network programming and I don't know if this is the right place where to ask. I have a small router with a proprietary control panel (= no openwrt or similar). I'd like to know ...
6
votes
1answer
509 views

Why would my router have different MAC addresses for IP and IPv6 transactions?

Today I was using tcpdump and I noticed my computer was having IPv6 traffic with a particular MAC address that I could not match with an IP using nmap or arping. After looking at the tcpdump logs a ...
0
votes
1answer
353 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 ...
0
votes
1answer
397 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 ...
0
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0answers
48 views

Make router report MAC address when device connects/disconnects - preferably by HTTP POST

I want my router to report (preferably by making a php POST containing MAC address) every time a device connects/disconnects. I currently have a Netgear router (which is able to run dd-wrt), but I'm ...
0
votes
1answer
92 views

How can I connect to a router through a switched ethernet network?

I have a computer and a router connected at different positions to a switched ethernet network. I want to connect them as if I had plugged my computer directly into the router. As I understand it, ...
0
votes
0answers
103 views

How to best configure virtual machine network

Background: I have the following setup: Mac (OSX 10.8.5); Bootcamp partition; Virtual Machine, VM, (using Parallels Desktop) that runs from the physical Bootcamp drive; I have some Cross-platform ...
0
votes
0answers
129 views

How can I change the MAC address of hosted network?

I am on a MAC-filterd network. I have a pc and a laptop. I started a hosted network on my laptop. The Laptop has Windows 8. I set up a hosted network on this laptop to connect a smartphone. So the ...
0
votes
2answers
116 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 ...
0
votes
1answer
95 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 ...
1
vote
2answers
1k views

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 ...
0
votes
1answer
29 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?
3
votes
0answers
360 views

Multiple MAC addresses on a single network interface

Since the other question about this (Multiple network interfaces on a single NIC in Windows) only asks about different routing, I'm going to ask this again: Is there any way to create multiple ...
2
votes
0answers
86 views

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 ...
1
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2answers
22 views

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 ?
0
votes
1answer
61 views

Issues with IP address when changing MAC address

Whenever I spoof my MAC address the WiFi fails to acquire IP automatically and I have to set it manually. My original MAC address is blocked on the network. Please help me, I'm facing IP address ...
2
votes
6answers
763 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 ...
0
votes
1answer
71 views

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 ...
0
votes
6answers
3k views

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 ...
0
votes
2answers
161 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 ...
0
votes
1answer
180 views

iPad and Wifi Access point on a MAC restricted network

I'm trying to help my sister get her iPad online in her university halls of residence. She has one ethernet port in her room and there is no wireless provided. I got her a wireless router (which is ...
0
votes
2answers
65 views

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, ...
0
votes
1answer
166 views

CE interface in Solaris 10 drops mac address (per ifconfig)

I recently installed Solaris 10 1/13 and proprietary TCP PEP software on a new hard drive within an old Sun v210. When the PEP software starts, the Sun's CE0 interface loses its "ether" address, ...
1
vote
0answers
59 views

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 ...
0
votes
1answer
43 views

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 ...
2
votes
2answers
767 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 ...
0
votes
0answers
85 views

WIndows firewall rule to receive nbtstat information

I'm using nbtstat.exe to gather MAC-Addresses of machines in my domain. I'm only able to get a result, if the firewall is turned off on the clients! Output if firewall is turned on: Microsoft ...