Questions tagged [mac-address]
A Media Access Control address (MAC address) is a unique identifier assigned to network interfaces for communications on the physical network segment.
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Why couldn't MAC addresses be used instead of IPv4|6 for networking? [closed]
I am reading up on TCP/IP and other related protocols and technologies. MAC addresses are described as being (reasonably :) unique, and as having a large possibility space (several hundred trillions), ...
101
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6
answers
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What range of MAC addresses can I safely use for my virtual machines?
I want to assign my virtual machines MAC addresses so that I can configure DHCP reservations for them so that they always get the same IP address regardless of which host hypervisor they are running ...
25
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4
answers
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multiple MAC addresses on one physical network interface (linux)
Simple question:
How can I setup multiple MAC addresses on one physical network interface (linux)?
Why?
My ISP is checking ip<->mac on GW and I d like to route traffic through my "linuxbox" and ...
23
votes
4
answers
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Duplicate MAC address on the same LAN possible?
Let's say someone is on the same network as me and spoofs their MAC address to match mine:
Is this possible? Can two or more clients with the same MAC address be on the same network at the same time ...
7
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2
answers
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VirtualBox Import & Same Mac Address
Exported Virtual Box VM (CentOS 5.5 with Guest Additions Installed) - Success
Imported CentOS VM Successfully on another Windows Machine via Windows Batch
Problem :
VM After Import retains the same ...
4
votes
1
answer
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Assign DHCP IPs for specific MAC prefixes on Windows Server 2008 R2
I'm running Windows Server 2008 R2 for my DHCP server. We are about to switch over to a VoIP system and Cisco VoIP phones. I would like to assign a specific range of IPs to these phones which will ...
35
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13
answers
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how to generate a random MAC address from the Linux command line
How do I generate a random MAC address from the Linux command line?
I search for a solution that only requires standard tools commonly found on the Linux command line.
The MAC address will be used ...
11
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5
answers
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Can I use nmap to discover IPs and mac addresses?
When I need to locate the IPs of devices by their mac address on a
Windows system, I normally use Advanced IP Scanner (from radmin.com)
to scan the network, then I use arp -a to list the mac addresses....
10
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3
answers
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iptables, allow access from certain MAC addresses
Presently, I limit which clients can access my server by using IP addresses via iptables, only approved IP addresses can connect.
However, the problem with this is if a client is on a laptop and goes ...
9
votes
2
answers
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Assign DHCP IPs for specific MAC prefixes
I'm running a ISC DHCPd server for my network serving a number of subnets. One of the things I would like to do is assign a specific range of IPs to hosts with a common MAC prefix (ex. 00:01:02). Also,...
6
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1
answer
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Ubuntu Linux - two interfaces, same subnet, different vlan - MAC/ARP issues
I'm attempting to setup a server that needs to have interfaces on the same IP subnet, but different VLANs:
eth1.102 Link encap:Ethernet HWaddr 00:50:56:b1:00:0f
inet addr:10.1.1.6 ...
6
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1
answer
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Why are eth0 and vmbr0 (bridge) having the same MAC addresses?
I configured my Debian (with KVM on board) as following:
/etc/network/interfaces:
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet manual
auto vmbr0
iface vmbr0 inet static
address 176....
4
votes
2
answers
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ARP responds with single MAC address on Linux server with multiple interfaces on the same network
Linux server has 2 active network interfaces:
IF:eth1 IP:192.168.1.1/24 MAC:11:11:11:11:11:11 (1GbE)
IF:eth2 IP:192.168.1.2/24 MAC:22:22:22:22:22:22 (10GbE)
The idea is that the ...
4
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2
answers
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Physical interface MAC rather than macvlan MAC is sent as ARP response [closed]
On Arch Linux ARM (Raspberry Pi) Kernel 4.4.37, I created a macvlan e.g.
ip link add link eth0 mac0 type macvlan
The macvlan virtual NIC then appears in the list so I assign it an IP address, and ...
3
votes
2
answers
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How to get a report of all mac addresses on another subnet?
We have an MPLS consisting of two branches: Location1 and Location2.
I am using the Softperfect netscan to report all ip addresses and mac addresses of devices on Location1 where my workstation is ...
3
votes
1
answer
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hostapd: mapping MAC address to VLAN ID (static mapping via accept_mac_file)
I want hostapd to assign each station a given VLAN based on MAC address. BTW, my network is quite small. Using RADIUS would be an overkill.
According to the hostapd manual:
Optionally, the local ...
2
votes
1
answer
9k
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Assign two static IP addresses to one mac address
Can Isc-dhcp-server give two static ip addresses to one mac address?
I have several Genexis terminals in my network. Each terminal have two interfaces, one for public traffic and one for a management ...
2
votes
0
answers
2k
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Filtering traffic by MAC address with nftables
TL;DR: when spoofing MAC addresses, how can I make sure the real addresses won't be leaked to the rest of the network using nftables ?
Context
For network security training purposes I am currently ...
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Connectivity issues when setting guest MAC to the same as the host MAC on ESXi 5
I am using VMWare ESXi 5.
The ESXi 5 host has a NIC with the MAC XXXX:XXXX:XXXX
I have created a console port for that card.
I have added a new guest named COMP and manually assigned the MAC address ...