Questions tagged [mac-address]
The MAC address is the network address of an interface at data link layer in IEEE 802 networks such as ethernet.
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How are USB devices uniquely distinguished?
For experimentation purposes I have bought some pairs of wifi and bluetooth devices and I plan to get some more.
However when two or more of the same type are plugged in to the hub lsusb lists ...
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dnsmasq.leases write wrong parameter (opensuse)
I'm running platform tests on several computers. The dnsmasq.leases is writing a strange parameter when I test with Opensuse OS. Can anybody help me?
1681465068 00:04:5f:41:3a:d9 55.0.168.110 cpru201 ...
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Virtual Box host Linux Lite - Guest Windows 7 - unable to browse internet, but network connectivity (ping) works
I have looked everywhere for a solution, but none of them seems to be able to solve my problem. I am using Bridged adapter, with the host adapter wlp3so (the wifi adapter), Promiscuous mode "...
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1
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USB LTE modem without MAC address?
I'm connecting a linux machine using a nowadays popular Huawei Brovi E3372-325 LTE USB Stick to the internet. The special requirement is that incoming ssh/ping/NTP/... connections must reach my linux ...
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macchanger's effect disappears when wifi connection is back up
When I installed macchanger package I set it to change mac address everytime an interface is down. However I noticed that my IP address was not changing. So I examined my mac address.
When connected ...
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How do I set a static MAC address for the default gateway on startup?
I need to set the default gateway's MAC address statically.
I used the command:
arp -s <ip> <mac>
That works, but on reboot the entry is back to being dynamic.
I have tried:
Writing the ...
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1
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How to tell qemu to randomly assign MAC addresses
I'm starting three Qemu VMs, each with several network interfaces. The network interface config looks like this:
-nic user,hostfwd=tcp::"${ssh_ports[$machine]}"-:22,model=virtio-net-pci \
-...
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How can I make Linux generate different MAC addresses for different bridge devices which are on different PCs?
I have just upgraded two servers from Debian 10 (Buster) to Debian 11 (Bullseye). Afterwards, I could not reach either of them via the network any more. After some investigation, the following problem ...
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Find out what keeps changing my MAC address on reboot
Some time ago I installed macchanger to play around with some wifi stuff. Soon after that I uninstalled it again (with giving 'purge' to apt), together with everything else I installed before around ...
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Why did the mac address of bond changed on CentOS7 after reboot
I have two interfaces bonded together in LACP mode (mode=4 <=> 802.3ad) in bond0 :
The mac address of bond0before reboot :
$ cat /sys/class/net/bond0/address
xx:xx:xx:xx:xx:bf
The mac address ...
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MAC based routing with nftables and ipv6
I want to match every traffic from a server but it is at the same interface.
MAC 88:7e:25:d3:90:0b > ens19 > table 147
Therefore I made this nftables rule
table ip filter { # handle 3
chain ...
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1
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461
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Unique Mac address for Secondary IP address?
Using one Ubuntu machine with one physical NIC, I want to make it seem that there are two or more additional machines on my real network, all controlled by this one Ubuntu machine.
For example, I have ...
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1
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maching source MAC address in nftables
I want to match all data from ens19 with the mac address 88:7e:25:d3:90:0b use table 147.
My idea is to mark the data from 88:7e:25:d3:90:0b and give it a fwmark 14. Then use ip rule to the specified ...
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Why is this MAC address iptables whitelisting not working?
This is on a router. I have $mac as the MAC of one client and $set is an ipset of type hash:net. My intention is to deny access to all networks in $set, except for $mac who can access the networks.
-A ...
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Get MAC address before network is ready
I created a script to set a bunch of computer hostnames to the last 8 digits of the MAC address. The MAC address is a unique number baked into every computer, so it works well.
I created a systemd ...
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What caused the ethernet mac address to change after an update of my linux system?
I recently updated my machine and after a reboot I discovered that my ethernet mac address had changed. The router settings for that machine were no longer implemented as it was viewed as a different ...
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2
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Bridge gets random MAC instead of port address
I have a fresh install of Debian 11 and did a bridge setup:
auto br0
iface br0 inet dhcp
bridge_ports eno1
What I expect is that br0 has the same MAC address as eno1 but it gets a randomly ...
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Run a terminal command when device connects to a WiFi network
I spoof my MAC address on a public WiFi network that I use often, but I do not want to have my MAC spoofed on my home network. I was thinking that a way to automate this is to have the computer ...
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Delete illegal router from network
I have a default gateway with IP address 192.168.1.1 and MAC address 5c:77:76:6e:0d:7b. It is my only wi fi modem router from which I receive internet.
But in input nftables logs I saw another one ...
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how do i get interface name, ip and mac from active interface only (except lo)
I use this command to get the name of my network interfaces and their mac address
ip -o link | awk '$2 != "lo:" {print $2, $(NF-2)}' | sed 's_: _ _'
out:
enp2s0 XX:XX:XX:XX:XX:XX
wlp1s0 YY:...
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Loop through MAC addresses, how to handle both numbers (0-9) and letters (a-f) in a "for" loop
I've a script with this code
for i in {2..9}
do
grep "Node${i}\|01, source address = 00:00:00:00:00:0${i}" t1.txt > t2.txt
done
Is it possible to expand the loop ...
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How to filter (rate-limit) traffic through a bridge, using nftables, depending on whether or not the traffic originated locally?
I'd appreciate some help with understanding how traffic filtering in a bridge works, especially for packets / Ethernet frames which originated locally. To explain the problem, I'll shortly describe ...
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Network driver didn't actually change to the new MAC
whenever I try to change my MAC address I get "Network driver didn't actually change to the new MAC!!" error. I have tried;
macchanger wlan0 down
macchanger -r wlan0
Output:
Current MAC: ...
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MAC address spoof of a wifi connected device, not the network interface of the PC
Some devices are known to data hosts by their MAC. If you physically replace that device and it has a new MAC the host will not accept the data. All the router will do is spoof the network interface ...
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Detecting IP/MAC spoofing using iptables
Is there any way to detect IP or MAC address spoofing with iptables?
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Unable to connect via SSH to when eth0 is disconnected
I've seen a few similar questions, to this one, but have not found a solution. I'm working on a Raspberry Pi and wiring up a second Ethernet port (ultimately it will be the only port on a Pi Zero, ...
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Read MAC using Buildroot 20.20 NVMEM_IMX_OCOTP on i.MX7s
We are migrating from Buildroot 2018.02.9 (linux-4.14.85) to Buildroot 2020.02.2 (linux-5.4.40), and have found that we can no longer read the MAC address on an I.MX7s SoC. The following indicates why:...
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Find the IP address of a newly-booted Raspberry Pi
I've attached a Raspberry Pi running Ubuntu to my home network with a cable. It is booted up and connected to the network. The Pi has no keyboard, mouse, or monitor. If I know the IP address that was ...
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How to find where zoom is getting MAC
It looks like based on stdout output after running a malicious app called zoom, that it gathers the currently used MAC Address. I am looking to block this functionality via AppArmor, however I cant ...
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Changing of MAC Address with Network Manager on Debian 10
Looking at syslog files on Debian 10 form a previous session I have noticed a MAC Address change and I do not know why it is happening. Any ideas on how to stop this?
Jun 8 15:43:46 NetworkManager[...
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mac address of usb ethernet device changes each time on reboot on raspberry pi 3b running raspbian
Mac address of embedded usb ethernet device (smsc95xx driver) is being changed on each reboot
- its happening despite adding to the /boot/cmdline.txt smsc95xx.macaddr=00:11:22:33:45:67 - I know that ...
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Does a DHCP server assign MAC addresses to network computers?
I have been working on basic Linux network configuration. I am aware that IP addresses, default gateways, subnetmasks etc are assigned by a DHCP server but am unsure if MAC addresses are assigned by ...
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How can I 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
I get
ifconfig: SIOCSIFHWADDR:...
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Macchanger works until connecting to network in Debian 10 [duplicate]
I’ve been trying to test out my MAC spoofing abilities on my home network using Macchanger. When not connected to WiFi, it works just fine. I can bring the interface down using ifconfig, change the ...
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SSH with MAC based filtering using iptables - recommended?
I have a server in an internal network (login there via VPN) from where I login to the server via SSH with OpenSSH public/private key authentication. From a security point of view, I want to tie the ...
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Can I remotely connect my office system "PC-A" to another neighbouring office system "PC-B" through mac address?
System description
I have two Ubuntu (Mate-flavour) systems in my office "PC-A" and "PC-B".
previously(4 days ago) I was able to remotely connect both the PC from home.
both are connected with the ...
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1
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Changing `iptables` rules by `MAC` address
I'm using a gateway connected to VPN to do forwarding with the port of an industrial LAN element.
I use iptables forwarding to access port 80/443 of my gateway in the browser to show me the contents ...
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0
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Pinging default gateway on a Linux virtual machine
I have two question about the network. I started to ping my router from my Linux virtual machine and I have intercepted these ICMP frames. I noticed that the destination MAC address is not my router ...
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Upgrading stretch to buster interface MAC issues
After upgrading Debian from stretch to buster I am encountering weird behaviour of the ethernet interface.
This installation runs on a Hyper-V host.
After rebooting, the mac address reported by the ...
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How to change eth0 MAC address only using a text editor?
I am running OpenWrt (=Busybox per SSH) so my amount of binaries is limited. I would like to change my MAC address only using a text editor like nano.
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Is it necessary to down/up interface during MAC address change?
I'm using SuSE 12.2 with custom kernel 4.4.21 (minor changes related to real time environment).
Is it really necessary to down/up the interface during the MAC address change? What I observed is that ...
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Attempting to use airmon-ng returns error
So im trying to use airmon-ng so i can get some mac addresses and deauth them 'with permission, ofc' im on Nethunter and airmon returns this
ls: cannot access '/sys/class/net': No such file or ...
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3
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bash script to get MAC address and paste it to ifconfig file after HWADDR
Is there a way to get the MAC address from ifconfig and append after HWADDR in ifconfig-eth0 file? I have used awk command to show MAC address but couldn't figure it out to hold that information and ...
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getting MAC address of system: eth0 vs PredictableNetworkInterfaceNames
I wrote some C code having a rudimentary software licensing function within, where the executable will only run if the MAC address of the system I whitelisted in my C code. I only want this to work ...
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Host key verification failed after changing MAC address
I changed my MAC address, I believe using sudo ip link set dev interface address XX:XX:XX:XX:XX:XX, in order to be assigned a new local IP address to fix some network issues I was having. This worked ...
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Read a json file and run a command in Bash
I wanna block a mac address which downloaded value is over "20480":
The json file:
{
"client_length": 3,
"clients": {
"ac:07:5f:77:40:e9": {
"id": 1,
"ip": "192.168.5.40",
...
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setting/using MAC that is multicast and local
is it possible to set a MAC address using ifconfig where it has a 11 in the least significant bits of the first octet?
For testing I want to do
ifconfig em1 hw ether 13ffffffffff
using 12ffffffffff ...
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DHCP lease table in router shows weird entries when connected to Linux server
I have a domestic server where a MitraStar ADSL router is connected to a bunch of mobile devices plus two desktop machines (one Linux and one Windows) connected by Ethernet cables. IP address 192.168....
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systemd macchanger start job hanging
I am running Arch Linux and I have set up systemd to change my MAC address on startup with macchanger
# /etc/systemd/system/macspoof@.service
[Unit]
Description=macchanger on %I
Wants=network-pre....
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3
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Replace MAC address with UUID
I am looking for a way to mask the client MAC address every time it appears in a logfile before using the logfile to present data to a customer (GDPR rules).
I can identify the MAC string using regex,...
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