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Questions tagged [mac-address]

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

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clearing the four least significant bits of mac address

I'm setting up virtual ssid's and came across this guide https://medium.com/@renaudcerrato/how-to-setup-a-virtual-ssid-with-hostapd-804c13c9a3c2 This part clearing the four least significant bits and ...
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how do I configure a network to give different MAC addresses depending on the IP address?

I have two virtual bridges, one (vmbr0) with a primary and secondary IP address and another (vmbr1) with an internal network. vmbr1 is set up with masquerade so that the MAC address for vmbr0 is used, ...
evalprime's user avatar
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Windows 10 network adapter MAC address change

Trying to replace original MAC address of my network adapter with a custom one, but it behaves strangely: Changed MAC address (tried many custom ones, such as 0123456789AB) within adapter properties' ...
user2956477's user avatar
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Home device tries to connect directly to the Internet Service Provider, bypassing the router

I have a router ASUS RT-AC1200. Firmware is the latest: 3.0.0.4.380_10931-gfed566f. It is connected to my Internet Service Provider (ISP). The router has a static MAC address, which I don't change at ...
Yaroslav Boichuk's user avatar
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How to Block a Wifi-Router by MAC adress via terminal

I Need a Little help. Explain : i got in my Home a homespot/hotspot with „ Ssid: Vodafone homespot“. This is a Service run by every Router from Vodafone where homespot sharing is active. There are 5 ...
Levi's user avatar
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Unknown device on wifi network

I have a new unknown device with the name F4X0VG3 with a MAC address d4:54:8B:AD:17:90 showing up on my wifi network. How can I figure out what it is?
KH101980's user avatar
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How to change or clone ONU pon mac adress? And I want to know which model of ONU will get this benefit

ISP is blocking me everytime from OLT my anu's MAC address.that's why I need to clone or change my MAC address.how can i change it. I would like to know if I will get this benefit if I use ONU of any ...
freindly khan's user avatar
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Change MAC adress virtual switch Windows server with Hyper-V

I have a windows server installation in which I run Hyper-V. Hyper-V has created a Virtual switch network adapter which my Virtual Machines can use. Virtual switch Hyper-V Both of these adapters have ...
Runey's user avatar
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How do I assign a mac to an ethernet port in DHCPCD

I am running a Raspberry Pi Zero with two usb connected ethernet ports (different models, different MACs). When I cold boot MAC A is assigned to eth0 and MAC B is assigned to eth1. after a reboot MAC ...
Eric S's user avatar
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Laptop can't connect to many websites (ERR_SSL_BAD_RECORD_MAC_ALERT) from home WiFi

I'm having a pretty weird problem. At some point and without having done anything different, my laptop just can't connect to certain websites (many websites, not just 3 or 4). When I try to access ...
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Changing Mac Address with TMAC makes the mobile hotspot not work

Changing Mac Address with Technitium TMAC makes the mobile hotspot not work I have a Realtek 8811cu wifi usb adapter (Tenda U10) I changed the mac address from E8-65-..-..-..-.. to starting with 02-..-...
bhavin nor's user avatar
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I changed the mac address of my router to attempt to a get a new i.p addres, but. Now only one device gets internet

I first unplugged my modem, then plugged in a different router. I got a new ip assigned. I then connected my computer to the original router and then changed the mac address of that router to the mac ...
DARKuser99's user avatar
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2 answers
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block mac address with Iptables during attack

I have to setup Iptables to block every mac address from which 10 requests come in one minute. (ssh or http login) To block the IP is achievable with iptables -A INPUT -p tcp --dport 22 -m hashlimit --...
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Linux Bridge MAC Address flip flopping

Does anybody know why our server is flip flopping between the mac address of the main network interface (eno0) and a bridge interface (br0) on the same machine. I don't think it's affecting ...
Milonic's user avatar
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Why is MAC address required in LAN, and not just IP address?

I learned that in a local network computers that communicate inside this network not only need the IP address, but also a MAC address. Is this a relict from the early days of computer networking? ...
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Can I see the MAC adress of my router WAN port?

I have a TP-link Archer C7 router. It is managed by an external company (lets all that Company A), and I don't have admin access to it. I do have physical access, but do not want to make a factory ...
LudvigH's user avatar
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My laptop has been stolen. Is there any way to trace my laptop if I know someone is using the same Wi-Fi I use?

I lost my laptop yesterday. I’m living in hostel in which around 5,000 members are living and we all use the same Wi-Fi provided by the hostel. I don’t know the MAC address of my laptop. I tried to ...
Madhu's user avatar
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Can I get the IP address of device using MAC address? or logs of IP used by MAC address?

I been using debian linux version Stretch it seems arp command is helpful but it only collect those online devices
TheBarge's user avatar
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Mapping a MAC address of a Level2 switch to a name

With brctl showmacs br0 I can get a list of all the MAC addresses found on a bridge. To make this more human-readable, I translate the output by replacing the MAC addresses with hostnames (for fixed ...
Bram's user avatar
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What is happening with my MAC address when connecting my pc to the internet?

I want to understand how my MAC address gets shared with others (router, other devices from the local internet). Is it in the internet packet which gets send... and when? Is there a way to interfere ...
Florian-Mahlberg's user avatar
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Is there a way to determine the real mac address of a host that is using a randomized address on a wireless network?

I want to find the real mac address of a host that is using mac randomization. Is there a tool that can help me discover its real mac address? Things I've tried: Modifying my system's arp table and ...
Sir Nonchalant's user avatar
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1 answer
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How do networks identify iPhones when their MAC Addresses are constantly changing?

I found out recently that iPhones will change their MAC address every time they connect to a network. But I've found that things like internet filters are still able to identify each unique device, ...
Blue Herring's user avatar
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11 answers
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I am confused about the way a common home router works: Shouldn’t the MAC addresses be enough to forward the information to the correct destination?

From what I've understood, the way it works is something like this: Why the necessity of associating private IP addresses to each one of the addresses connected? Shouldn’t the MAC addresses be enough ...
Ceccoclat's user avatar
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Range extender with 2 almost identical mac addresses on the router

I hope it's the right section to post this question. On the wifi router I see 2 entries for my tp-link range extender with the same IP. One is with the correct MAC and I see the IP v4 and the IP v6. ...
solonely's user avatar
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2 answers
3k views

How to get wifi mac (BSSID) of router you are connected?

How to get wifi mac (BSSID) of router you are connected under Linux? Networkmanager installed.
Smit Johnth's user avatar
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3 answers
1k views

If one or more IP addresses can map to the same MAC address, why are MAC addresses necessary

If one or more IP addresses can map to the same MAC address, why are MAC addresses necessary? Even though MAC is a data link layer address and IP is a network layer protocol, why isn't an IP ...
rahs's user avatar
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Is it possible to send packet under other node's IP?

I have 3 machines on my network 192.168.2.1 => pfSense Router ( 00:0c:29:d4:1f:88 ) 192.168.2.2 => My Kali Machine ( 00:0c:29:20:f8:0a ) 192.168.2.11 => Linux ( 00:0c:29:1a:b0:f0 ) What I ...
LoneWolf47's user avatar
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What is the source ip dest ip source mac and dest mac in Gratuitous ARP response

So I am sitting at host A. And I need to send Gratuitous ARP response to Host B. in Gratuitous ARP response I dont know the mac address of Host B my computer on LAN. But can I add 0xFFFFFFFFFFFF to my ...
user786's user avatar
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1 answer
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Unable to connect iPhones after MAC address filtering to TP link router TL-WR840N

I enabled MAC address filtering on my TP link router TL-WR840N and I am unable to connect all other devices to it (Android TV, NVR, Android phones and MacBook). The only problem is I can't connect any ...
zbalouch's user avatar
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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 ...
Android's user avatar
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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 ...
max's user avatar
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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 ...
Muhammad Hammad Bashir's user avatar
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1k views

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 ...
ChristAHFER's user avatar
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999 views

Code to spoof MAC address on startup?

Is there a way to randomize MAC address every time on startup.
namakacompositionfox's user avatar
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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 ...
linuxsuperuserhsdmxd's user avatar
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0 answers
637 views

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 ...
Rusty Lemur's user avatar
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1 answer
365 views

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 ...
caruzip's user avatar
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0 answers
264 views

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 ...
yogurt's user avatar
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1 answer
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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 ...
sneed2233's user avatar
4 votes
2 answers
4k views

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 ...
Amit G.'s user avatar
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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 ...
Brandon's user avatar
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1 answer
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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 ...
Anon756's user avatar
1 vote
2 answers
739 views

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, ...
async's user avatar
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2 answers
6k views

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 ...
Jay Wise's user avatar
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0 answers
71 views

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 ...
Caleb's user avatar
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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 ...
Franck Dernoncourt's user avatar
1 vote
4 answers
13k views

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 ...
MertN's user avatar
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1 vote
1 answer
890 views

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 ...
TommyGee's user avatar
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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 ...
Harry's user avatar
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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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