Questions tagged [mac-address]

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

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Every second an unknown MAC address sends an ARP probe

I just inherited a network and found something I can't say I've seen before. About every second (sometimes longer, sometimes shorter) a MAC address that I can't find anything about sends an ARP probe ...
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What would be the best site to lookup MAC addresses I been on a few diffrent ones and cant seem to find one that randomly popped up on my wifi [closed]

What would be the best site to lookup MAC addresses I been on a few diffrent ones and cant seem to find one that randomly popped up on my wifi along with a Hidden Ssid .
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After modifying mac address of Windows 10, Windows 10 mobile hotspot stopped working

I searched all the internet for the solution. No luck! After changing my mac address using the software Technitium MAC Changer v6.0.7, i can no longer connect to the hotspot. I've tried to connect to ...
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How to use multiple wireless device and i have voucher for 1 device

My internet provider is giving me an internet voucher for 1 device, so when I login with voucher in the Captive portal. So is there any way or device which registers to this network with one MAC ...
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Incorrect MAC address on DHCP

Recently I experienced an issue: A Label Printer shows up as offline and users cannot print from it. The MAC address of the printer was given to someone who reserved a DHCP lease for it. I restarted ...
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Code to spoof MAC address on startup?

Is there a way to randomize MAC address every time on startup.
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Can’t take network interface down on Ubuntu 20.04.4 LTS

I'm trying to change my WiFi MAC address following this article: https://www.linuxshelltips.com/change-mac-address-linux/ After taking down my network manager, when I try to take down the network ...
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Can Linux do "source MAC based routing?"

I'm looking for a way in Linux to perform source-MAC based routing. My goal is to have a router with the following routing: echo 100 inbound >> /etc/iproute2/rt_tables ip rule add iif eth0 ...
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For MAC address filtering, why do we only need the mac address of the ethernet adapter instead of the laptop's mac address?

So I understand every device that has a NIC will also have a MAC address which means laptops and Ethernet adapters will also have a MAC address. And a MAC address is needed for the sysadmin to ...
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Wifi not working after I changed MAC address

I wanted to change my ip, so I looked online and saw that you can do that by changing the MAC address, so I changed my MAC address directly, but no matter what I do, none of the changes work and my ...
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Routing network based on MAC address on macOS and Windows

On Linux distros that use Gnome's Network Manager subsystem, the nmcli (Network Manager CLI) allows you to add an ethernet connection for a device with a specific MAC address using nmcli con add type ...
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Used to get a new public IP on MAC change, don't anymore? (Netis - Archer)

On my old Netis router, a really old piece of tech that came with my internet package, I could go to localhost, and change my MAC address, which would instantly provide me with a new public IP. It ...
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Is it possible to disable access to the "Router Settings" from the Wifi?

For security reasons, I would like to disable the access to the "Router Settings" from the Wifi. I already set a White-List "Accept" MAC filtering, but there is a chance that a ...
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I have an unknown device connected to my wifi and the only info it gives me is this mac adress f2:9c:10:eb:24:0b and i dont get any hitslooking it up

This mac adress is the only information I can get off of this unknown device connected to my wifi.Ive look up this mac adress and its not linked to any device. Can someone please help figure out what ...
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Automatically transferring a string from a Windows PC to a Linux server

This is my current situation: I have a PC running the latest Windows 10 and a Raspberry Pi running Raspbian. On my PC I spoof my MAC address every other day. I always need the current MAC address of ...
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Why does Cloudflare's 1.1.1.1 allow you to bypass MAC filltering?

I was trying Virgin Media's MAC filtering, and set it to not allow my laptop to use the internet at 5:00PM as a test. I was at the time using cloudflare's VPN 1.1.1.1 with Warp, and once it hit 5PM, ...
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Can someone explain my 3 MAC addresses on my router modem

I have an odd issue. On my netgear router/modem admin page I have 2 MAC addresses with last letter difference one is an A the other a B. But on my bridge router connected to the netgear one I am ...
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Windows 10-- Legacy Application cannot "see" system MAC address

I am attempting to run a legacy program (Agfa d-Workflow) which binds the software license to a MAC address. I am running Win10 but the program was originally written for Windows 2000. It is known to ...
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How can one change the MAC address of USB WiFi Adapter TP-Link Archer T3U Plus on Windows?

I use a USB WiFi Adapter (TP-Link Archer T3U Plus) with my Windows 7 SP1 x64 Ultimate. How can I change its MAC address? The TP-Link Archer T3U Plus manual (mirror) doesn't mention how one can change ...
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Easiest way to find MAC address of a device

We have installed a bunch of medical devices to a location and now we need to activate their network function. Device has an embedded OS (unknown) and only shows its IP address on its network menu ...
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Multiple ARP requests from an IP address outside my LAN using an unknown MAC address

I have a vexing recent issue on what has been, for the most part, a very reliable home network. Since it is a hobby for me, it’s probably a little more complicated than the average home, but it’s ...
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How to create a multi-homed Docker container from command-line?

How do I create 2 NICs in a Docker container, each having a different MAC address, from outside of the container, when the container is created / spawned off for the first time? That is, using the ...
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ONT doesn't answer ARP request

I've been working with a custom linux image, based on yocto, running on an industrial tablet. During my tests, I've faced some problems to connect to a wifi network after rebooting the device. Before ...
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USB Modems Duplicate MAC Address

I am having trouble with Huawei USB modems (E5576-856) that have same mac address when connected with USB. This creates mac collisions when connected on VPN due to mac duplication. Both firmware ...
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Juniper ex2200 + mac filtering

I have virtual chassis with 4 juniper ex2200. for security reason, id like to close all ports for traffic coming in for unknown MACs (i dont want anyone coming with his laptop and pluging it to the ...
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How Does a Computer Initially Connect to a Router / Network

If I have a computer with a network card, it will have a MAC address and a localhost IP of 127.0.0.1. So how does a computer with a network card discover routers and connect to them initially? I ...
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Relationship between MAC address and device [closed]

Using a device to find its MAC address is easy, but using a MAC address to find its mother/father (the device which owns the MAC address) is possible? If it is, how? Notes: I had set up a DoS ...
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finding device via Mac Address

I have a device in my home network that I am not sure what it is? I know its mac address and find the manufacturer- Aloys, Inc - I use nmap and find its OS : OS CPE: cpe:/o:linux:linux_kernel:2.6 OS ...
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Remote access to smartphone from PC by knowing IP and MAC

I'm wondering if it's possible to transfer files from my smartphone (Android 9) to my PC (Ubuntu or Windows) without installing any app on the smartphone and without touching it. I'd like to perform ...
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Can you change a mac address on a Chromebook using Linux beta? (mac spoofing)

I know there's a way to change your MAC address temporarily however I can't be bothered having to go to the store to buy a USB to back up my files so I can go into developer mode. So I was wondering, ...
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No internet connection on Kali Linux VirtualBox after changing MAC adress with macchanger or ifconfig command

i just started learning Kali Linux as part of Ethical Hacking step by step program. After installing VirtualBox and Kali on it as VM , one of the steps was learning how to 'spoof' your MAC adress .. ...
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While using phones hotspot , should the wifi mac address same as the dhcp mac address?

I have my laptop connected to internet through my mobile phone's hotspot . Now on doing ipconfig /all in cmd , it shows the same address for DHCP and DNS servers (supposedly my phone is expected to ...
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MAC address in TCP Header - HTTP Request?

In the same below, why are there MAC addresses in the respected request packets? Why and how did the client obtain the destination MAC address? At first I thought it was the router, but can this ...
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Notepad ++ extract MAC addresses from text

How to extract MAC addresses from text to get a list where each line is one MAC adress only? I try to mark MAC addresses with regex, bookmark lines and delete unmarked lines but there is still too ...
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Is it possible view the MAC address from the hard drive one an old computer?

I need to see the MAC address on a system from an old computer. I tried a lot of things in Event Viewer and also in the Regedit but I can’t seem to find it. Is there any way to do this? Is this even ...
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No internet when I change my router

I have a PPPoE DSL connection. I have one router and it connects to ISP and I have internet access. But when I change it with any other router and try to connect it using using the ISP given ...
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ARP IP addresses. Am I in trouble somehow?

I recently got a message from Norton Antivirus: New network detected and saved which confused me. I found out that I can check that with arp -a so I did. I noticed about 100 different IP addresses. Is ...
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Block connection to Wifi network by MAC address, not by SSID

The only questions similar to this I've seen related to routers, and I want to accomplish this just on my wireless card, an Intel Dual-Band 8260. I get internet through a wifi hotspot, (xfinity ...
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How to find an ip address if we have the mac address

I have my friend's mac address how can I get his IP address? Is there any command which will take mac address and give us an IP-address?
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MAC Address Spoofing causes VM Machine to lose physical connection?

I currently paid for a Network Testing/Python coding course online and one of the first programs we created was a MAC address changer. When I change the MAC address of my Virtual Machine it cuts out ...
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How to change Raspberry Pi's MAC address while connected over SSH?

I have a Raspberry Pi 4B connected over SSH (Putty with Xming server), I wanted to change the MAC address but each time when I enter the command 'sudo ipconfig eth0 down', my SSH session will get ...
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How to scan a network for MAC addresses?

From my router (running OpenBSD) I can do: arp-scan --interface=em1 --localnet And get a list of all IP addresses and corresponding MAC addresses on my network. But is it possible to scan for a ...
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Is it possible to get MAC address of a website?

I work on windows and was trying some network commands on CMD. I came across MAC addresses and was wondering if it is possible to get the MAC address of a website. I tried nslookup but it gave me the ...
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how to access and configure wifi repeater

My 5G signal does not penetrate through the whole house, so I figured I buy a WiFi repeater. This is installed and seems to work. However once I set up the WiFi inside the repeater it restarts and ...
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I don't recognize this HW address format

I'm looking at the contents of /proc/net/arp from a google wifi onhub's diagnostic report and the format of the HW address is confusing because it's missing a character and ends with an asterix. Does ...
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How to make Hyper-V not change the MAC of the default switch on every boot

Hyper-V changes the MAC-Address of its "vEthernet (Default Switch)" on every Windows boot. I can manually set it back in the "Hyper-V Virtual Ethernet Adapter Properties" under ...
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How does a network device update its MAC table?

When a network device updates its MAC table, what protocol is being called? I am pretty sure it is ARP, but correct me if I am wrong! What messages are being sent and from whom, what information is ...
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How to fix duplicate MAC Addresses on Ethernet?

For some reason, whenever I connect to ethernet on my Chromebook and my Macbook, the MAC Address is the exact same. As expected, this renders the ethernet unusable for both computers, but at least ...
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How safe it is to give my phone's MAC address? [closed]

I work at ISP company. They asked all of the employees to reveal the MAC addresses of their smart phones and the android/iPhone version. They told us that they collect data for a new project that they ...
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Same SSID different APs and MAC address filtering

I have one router and one Wi-Fi extender. The extender is only used to convert Wi-Fi to Ethernet to my desktop PC. Therefore I don't need the Wi-Fi signal from the extender, but the extender does not ...
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