Questions tagged [mac-address]

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

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rhel + Device xxxx has different MAC address than expected

in messages file we have the following error ERROR : [/etc/sysconfig/network-scripts/ifup-eth] Device papa2 has different MAC address than expected, ignoring. is it minor alert , and we should ...
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Can an ISP lock your Cable Model MAC?

I was with Spectrum for few years. Recently, I moved to a new location where Spectrum does not have service, so I had to move my cable modem (which I bought, not rented), an Arris Surfboard SB6183, ...
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Who does this IP belong to, possible spoofing attack?

I am currently using a TalkTalk router to access my home network. I've had issues previously with my connection being either slow or cutting out fully (not a common issue). I download XARP ...
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Network not working after changing MAC

I changed MAC address of my virtual computer with OS Ubuntu. (ifconfig enp0s3 hw ether 12:23:34:45:56:67) After that I was no more able to communicate with any network devices. Is there anything I ...
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I have been port scanned repeatedly by an address in the Netherlands - I can only block by MAC address - how can I find it?

I can only block inbound traffic by MAC address. How can I find the MAC address for a computer in the Netherlands. 185.202.1.161 is the bad guy
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How can I permanently change the mac address on a Linux 3.3.8 device without macchanger?

I'm trying to permanently modify my MAC address on a device running Linux 3.3.8 I cannot get macchanger to install either. When I try it with ifconfig eth0 hw ether [MAC_ADDRESS] I get ifconfig: ...
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DHCP Client List include different IPs for the same MAC. Is it a bug?

Previously I tried to ask this on Network Engineering but they closed as off-topic. I relied on this meta topic when posting there. I have an issue with Netis N4 Wireless Router which looks like a ...
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MAC Address issues while running DHCP server inside Ubuntu virtual machine

I have a Linux based gateway device which I can ssh via Ethernet. Its network interface is configured as DHCP client(I cannot change this config). As I do not have an Ethernet switch/router , I need ...
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What is my LAN card's MAC address?

EDIT: I meant wifi card, not LAN card. I want to connect wifi devices (printer, phone, etc) to my Windows 10 laptop. I want to used a reserved DHCP address on my router for the wifi card (not LAN ...
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228 views

Is the MAC address of the TAP-Windows adapter visible to the network?

When using the TAP-Windows adapter v9, such as when connecting with the OpenVPN GUI, does a router see the MAC address of the hardware Wi-Fi network card and the TAP adapter or just the Wi-Fi network ...
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Find Mac Adress Of Dead Motherboard

My Motherborad is Dead..But i Can Access in Drive C: (Drive c: in h.d.d) How can I access log file mac adress in drive c? My router only log file for past 1 month i want LOG for past 4 month ago ...
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How to know the device type using MAC address?

I would like to know what these devices are. Is there any easy way to tell by the MAC addresses listed? In particular the device with the address 88:6B:0F:5A:5D:18.
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Is it possible to have “on the fly” MAC spoofing with IPv6 for encryption/anonymization purposes?

I am in school for network security and advanced Cisco, and one of my classes this semester we picked up on IPv6 as part of the MS Server 70-741 Exam. When reading through the textbook and noticing ...
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Docker network equivalent of virtual machine bridged network mode

I want to deploy a Docker container within a network that appears accessible with its own link layer device / MAC address, the equivalent of a virtual machine with a bridged mode network adapter. In ...
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355 views

How to change MAC Address on windows 10 without third party software?

I have a Surface Pro 7 Model 1866 i5 and was wondering how I could change the MAC Address. I can view the MAC Address using the getmac and ipconfig /all commands in powershell and cmd to view my MAC ...
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how to bind ip with mac address

how to bind a ip address with mac address. I am trying to bind a pc with its mac address to always obtain a particular ip address from its vlan. The pc is connected to a 2950 switch which is then ...
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Learning MAC address of next hop without knowing IP address

Say we have a LAN - 5 hosts connected to a switch. I have not configured any IP address to any of the hosts. Can I communicate with another host machine by sending L2 traffic - L2 header and data ...
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Identical MAC Addresses on Network

I have a network wired connected heatpump with a static IP address on my LAN, my son's Nintendo Switch has an identical MAC address. Even though it connects via Wi-Fi from an access point, it refuses ...
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How to defeat mac address filtering on a wifi router

This question concerns a wifi router that has MAC address filtering enabled. For reasons beyond the scope of the question, the filtering can't be disabled. I have access to the router and can manually ...
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Do routers necessarily conceal mac addresses?

According to this answer, routers can conceal multiple devices before an ISP and make it look as if there is only one device (the router), with one mac address (just only the router's mac address!) ...
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1answer
51 views

Connection errors after changing MAC address on Wifi adapter linux

I've looked everywhere for anything on this but i can't find anything! Whenever i edit the mac address on my ALFA USB network adapter(using macchanger or from network-manager), I can't connect to ANY ...
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552 views

why is my router mac address off by 1 digit

I have a router. It shows the mac address as d4:b2:7a:a6:3d:04 however when I run arp -a from a server on the network, the mac address of the router shows as d4:b2:7a:a6:3d:5 Is this wrong? Did it ...
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Instructions to spoof MAC address in OS X High Sierra not working

I am following these instructions to spoof MAC address in High Sierra OS X: https://blog.macsales.com/43777-tech-101-spoofing-a-mac-address-in-macos-high-sierra/ but I get unexpected errors such as: ...
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How do I change my Wifi MAC address using terminal emulator and root?

I have researched many different ways of changing my wifi MAC address through terminal emulator with root, but none of these have worked so far. The command that I have bben trying was: su (as a ...
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How to share internet via Hotspot on windows when lan internet is MAC adress filtered?

I am using the internet via Lan on my laptop with windows 10. when I use normal software to share the lan internet through hotspot ( so I can use on my mobile) my mobile connect but does not have data ...
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IEEE Registration Authority mac prefix

I'm analyzing a big list of devices, and trying to detect the type of each one of them using different data. one of the data types I have is MAC Address, and i encountered the following mac address ...
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237 views

OpenVPN MAC filtering - adding multiple MACs?

I was following this OpenVPN document, and I've managed to enable the MAC filtering feature. How do I add multiple MACs for a single user to the database? Example command I would use to replace the ...
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1answer
188 views

Do routers forward MAC addresses to modems?

I found this question, but I'm still wondering if there were a way that a router could forward a laptop's MAC address to the modem, and if the modem could forward it to the ISP. Are there routers and ...
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1answer
169 views

MAC address randomization

I have some kind of problem. Im trying to make auto light switcher, when me or one of my family members come home.I have an esp8266 nearly situated to my house and sniffing MAC addresses of people, ...
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Finding device (manufacturer) details with its device type for the MAC address of a laptop/phone/iPad?

Is there way to find the Device (Or Device manufacturer) details with the MAC address of that device? I need this, to check whether the connected MACs are Laptop (PC)/Mobile Phones/Tablet (iPads).
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Setting up a virtual machine in a client's environment

I'm a junior penetration tester and recently went into the client's office in order to test an internal server of theirs. They gave me their laptop with Windows installed that is connected to the AD ...
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Up-to-date OUI database online? [closed]

Is there an up-to-date searchable database of OUIs? Was looking for our "Roomba" vacuum cleaner. Both netstat -rn and arp -a showed all our tablets, phones, laptop, router, and two others. The ...
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637 views

nmcli cloned-mac-address for *all* connections

How can I clone the mac address on my linux system using the nmcli command such that it's cloned for all wifi connections? I'm having issues with Network Manager overriding the mac address that I set ...
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184 views

Sustaining Internet access while changing my MAC address

I have noticed whenever I change my MAC address, I loose internet access until my wifi re-connects. My question is, is there any way to avoid losing internet connection when changing my MAC address? ...
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552 views

802.1X bypass / MAC spoof prevention

I was wondering if it's possible to prevent MAC spoofing / 802.1X bypass techniques as described here: https://www.defcon.org/images/defcon-19/dc-19-presentations/Duckwall/DEFCON-19-Duckwall-Bridge-...
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How to fill all of these fields in QoS?

I want to make the internet speed of a specific user on my router slow, but i have no background about these things. Can you tell me what should i put on each field?
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Router sending DHCP NAK to PC, but only when switching operating systems

Here's the situation: I have a PC with a single ethernet interface, with a single MAC address. On my router (a Linksys E4200 with stock software), I have a DHCP reservation set to the MAC address ...
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My IP changes every 10 seconds while connected to internet

I am not a network engineer, I just wanted to check if port 16000 is open for me. I went to https://www.yougetsignal.com/tools/open-ports/ and it showed my IP as 103.5.xx.xxx. However after 15-20 ...
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I need to create a dummy network adapter with a specific.customizable MAC address

I am trying to put a band aid on a very flawed piece of software, and need to create a dummy network adapter in Windows that will have a MAC address matching one of my real network adapters. This ...
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Router's associated IP/MAC: associated client's name not resolved?

The picture below is a partial screenshot of IP&MACs associated to our company's router. In the first line the client device name is 'resolved' as 'RNP931A07'. However, in lines 2 and 3 you can ...
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874 views

When is the broadcast MAC address and broadcast IP address used in a network?

I know that to discover the unknown details (IP/MAC) in a network the broadcast address is used. For example: DHCP client broadcasts request to get network detail from DHCP server, one host gets MAC-...
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Find my stolen Mac mini by MAC address

My Mac mini was stolen from my office and I think it was stolen by one of my colleagues. All of them are software engineers and I think the thief will install a fresh version of macOS on the stolen ...
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How to make sense of MAC addresses of synology NAS cluster?

I'm using the following command to find out MAC addresses of the synology NAS cluster (two physical machines): arp -a This shows me 4 different MAC addresses associated with the cluster. I assume ...
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Avoid: Getting duplicate MAC address, with MAC address randomizer?

First of, a little context as to why I ask this question: I'm currently researching how I can get more "anonymous" online, not because I'm doing anything I need to hide, but simply because I value my ...
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Windows 10 PC not being issued IP after OS reinstall

The issue: My router will not issue me a DHCP IP to connect via the ethernet adapter Devices involved, in order of connection: My PC (ethernet adapter on Asrock AB350 Pro4 motherboard) A powerline ...
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ARP cache MAC and Docker

When I run cat /proc/net/arp I see two entries* bound to : IP address HW type Flags HW address Mask Device 35.224.99.156 0x1 0x0 00:00:00:00:00:00 ...
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network issue after using macchanger. no internet, no ipv4

I used macchanger with these commands: sudo ifconfig eth0 down sudo macchanger -r eth0 sudo ifconfig eth0 up I am using it with virtualbox on a local network, I've never had issue with that before, ...
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A single MAC Address on my network shows with 2 IPs

I have a network monitoring app on my phone that shows each IP, MAC, and type of device on my network. While inspecting, I noticed that my laptop's MAC Address is repeated in two IPs. I do not run any ...
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4k views

Huawei HG8245H MAC Address Change (Clone)

My last router had an option to clone/change my router's MAC Address (did this in order to change my public IP Address for x,y,z reasons) On this specific router "Huawei HG8245H"(which is a 2in1 ...
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How to change the MAC address of a networking interface on FreeBSD 11.1

I'm trying to change the MAC address of my network card (a generic card using an Intel chipset) on my. system that is running FreeBSD (FREEBSD 11.1-RELEASE-p7). I get the following output when I ...

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