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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MAC address filtering in Linux

I'm a new system administrator of an existing Linux network. Apparently there is MAC address filtering there. How could I allow a specific MAC to connect to the network? The INPUT, FORWARD and OUTPUT ...
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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 ...
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How to prevent response to who-has requests on virtual eth interface?

we use small embedded X86 linux servers equipped with a single physical ethernet port as a gateway for an IP video surveillance application. Each downstream IP cam is mapped to a separate virtual IP ...
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Is is possible to to make several different IP point to the same machine? [closed]

If the answer is possible,how? DNS is not for this kind of job,obviously. UPDATE Can someone answer this question: domain name : IP -> DNS; IP : Mac -> ??
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Changing MAC address on the Fly on old kernel 2.6.x

I'm doing some research on old kernels and running the following on 2.6.7 or 2.6.8 gives a resource busy error. But on 2.6.28 the command works as expected. How would I determine which kernel allowed ...
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Does Mac address base restriction is possible over Internet?

I want to restrict the access into my server on MAC Address base over internet... does it possible??? or there any other way of restriction over internet instead of IP address possible?? (My users ...
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bad switchs duplicate my ip

I had a large area LAN. There were many switch and AP on it, then somehow I couldn't ping my servers, and it's said that the IP was duplicated. I use arpwatch and found out that one of the switch ...
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What does the MAC setting on an interface do to the ability to transmit frames?

I'm told that an interface can transmit a frame no matter what the OS has set for the interface's MAC. I'm also under the impression this is how VMs do host-bridging. If that is so, then what uses the ...
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What does ifconfig promisc mode do, or promiscuous mode in general?

This is what man ifconfig has to say about it. [-]promisc Enable or disable the promiscuous mode of the interface. If selected, all packets on the network will be received by the ...
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In Ubuntu, ensure that the same NIC gets assigned the same interface each time it comes up

I'm running an Ubuntu 9.10 server that has multiple NICs in it. I'd like to make sure that each time the kernel boots up, the NIC with MAC address 01:23:45:67:89:ab gets assigned to eth0 and the one ...
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Can one identify the MAC addresses participating in a wireless network?

Specifically I'm trying to track a portable device by MAC; it may be participating in either an open 802.11b network or one with WPA. Is it possible to monitor these networks for the presence of the ...
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Can I get the Network Adapter type (wired / wireless) from its MAC address?

I know I can get the card manufacturer ID from the MAC address, what about the "type" ?
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Will MAC filtering increase Wifi security?

I've always thought that you should enable MAC filtering to increase Wifi security (in addition to using WPA2). Now I've found this article (Wireless LAN security hall of shame) that says MAC ...
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Exchange server (apparently) changing MAC address

Occasionally, I stop being able to access our Exchange server from my PC. Just my PC - everyone else carries on without incident, but I can't ping the Exchange box, log in with Outlook or get to the ...
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Is there a way to determine if a certain MAC address is on the local network from a Synology Cubestation, which doesn't have arp?

I have a bit of a strange problem, I am trying to determine if a certain MAC address (my xbox 360) is on the network (i.e. on) The problem is i'm doing it from my Synology Cubestation, which is a ...
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Odd traffic behavior of statically entered mac addresses over cisco 3750 vlans

At my workplace we use cisco switches to a implement a custom traffic delivery mechanism at layer 2. Custom software puts specific destination macs on ethernet frames and vlans segregate the traffic ...
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What security problems are caused by public MAC address knowledge?

What types of attacks are made possible or worse by having knowledge of a target computer's MAC address? I am planning on using a type 1 UUID generator that includes the generating computer's MAC ...
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cloning mac address of physical server converted into vmware server

We've recently converted a physical Windows Server 2003 into vmware using P2V. However, one of the pieces of software on the 2003 machine are still looking for the old server's network MAC address in ...
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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). ...
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router setup with server checking MAC addresses

I am running my own router on my university's network. The university checks to make sure the mac address of the computer is registered before allowing traffic to go through. What I've done is setup ...
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Docking Station MAC

Would an HP notebook docking station have its own Ethernet MAC address independent of the internal Ethernet MAC on the laptop itself? I'd test it myself, but the answer decides whether or not we even ...
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connecting a switch behind a MAC Address filtering router

I have a home 802.11N + ethernet router (D-link DIR-655) with MAC filtering enabled. I am trying to connect a switch to one of the ports (D-Link DGS-2208) and connect two devices to that switch. ...
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Connectivity problems - ARP, MACs and IPs

I'm trying to diagnose some connection issues I was having last night while setting up my new PC based router. For a while everything was working perfectly, but then suddenly I found that I couldn't ...
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Find the network card mac address in Windows

How can I find the network card mac address in Windows (7)?
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how would it be possible to discover a cable modem's MAC remotely?

i was reading the back archives of a canadian privacy law blog, and he linked to a judicial decision. apparently as part of an investigation in which were used yahoo chat and google's old 'hello' ...
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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 ...
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MAC Address Spoofing/Changing Software

What is the best MAC address changing/spoofing/editing program available for windows, mac and linux?
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VirtualBox cloned Ubuntu Server network error

I run a number of virtual servers on my network and I want to be able to easily clone base installations of Ubuntu Server. I use the VBoxManage command to clone the actual hard disk and I then create ...
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Why did I have to clone the MAC address?

I have a Zoom X5 ADSL modem/router and a DI-524 router. I needed to turn the Zoom X5 into a modem only and use the DI-524 for router functions (DHCP Server and NAT). What drove this configuration is ...