Questions tagged [mac-address]
A MAC address is a unique identifier for network adapters or network interface cards.
408
questions
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25 views
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 ...
0
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1answer
30 views
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, ...
0
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2answers
42 views
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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0answers
39 views
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 ...
0
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1answer
35 views
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
0
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1answer
79 views
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: ...
0
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0answers
34 views
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 ...
0
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0answers
30 views
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 ...
1
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1answer
88 views
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 ...
0
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1answer
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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0answers
33 views
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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2answers
2k views
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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0answers
67 views
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 ...
1
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0answers
72 views
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 ...
3
votes
1answer
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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0answers
62 views
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 ...
0
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3answers
116 views
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 ...
8
votes
4answers
2k views
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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3answers
240 views
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 ...
0
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2answers
74 views
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!) ...
0
votes
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 ...
2
votes
2answers
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 ...
0
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0answers
515 views
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:
...
0
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0answers
311 views
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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0answers
14 views
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 ...
11
votes
3answers
2k views
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 ...
1
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1answer
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 ...
0
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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 ...
0
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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, ...
0
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0answers
117 views
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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1answer
53 views
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 ...
-1
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2answers
108 views
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 ...
0
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1answer
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 ...
1
vote
1answer
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? ...
0
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1answer
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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0answers
53 views
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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0answers
98 views
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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0answers
104 views
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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0answers
148 views
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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0answers
24 views
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 ...
1
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1answer
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-...
-1
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1answer
168 views
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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0answers
4k views
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 ...
-2
votes
2answers
190 views
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 ...
0
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1answer
40 views
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 ...
2
votes
1answer
779 views
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 ...
0
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3answers
846 views
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, ...
-2
votes
1answer
78 views
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 ...
-1
votes
1answer
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 ...
0
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2answers
755 views
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 ...
