A Media Access Control address (MAC address) is a unique identifier assigned to network interfaces for communications on the physical network segment.
1
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1answer
39 views
Redirect traffic on port 80 into apache for unknown macs, and into squid for some macs
I have a linux box behaving like a router that handles two network interfaces: eth0 for internet and eth1 for LAN.
I set up iptables in order to redirect all the web traffic coming by the LAN into a ...
0
votes
0answers
17 views
How do clients “recognize” network servers for automount purposes?
Say I have two media servers on a single subnet. They have the same name, hardware, setup.. etc. Except for any UUIDs/MACs, they are the identical.
How does my client tell them apart, especially ...
0
votes
1answer
44 views
Possible MAC conflict in ESX
I have two virtual machines that are 10.1.1.10 and 10.1.1.20 in an ESX.
I try to access theses machines by another network 192.168.1.0/24.
The problem is that when I can ping one machine, I can not ...
0
votes
0answers
50 views
Broadcom NetXtreme II GigE Teaming Does Not Use Unique MAC, Causing Collisions
I currently have a new Dell server on my local (inside) network that I have setup to use three of the four nics to create a team. Examples below.
NIC_1 - mac: 000000000001 - ip: n/a
NIC_2 - mac: ...
0
votes
0answers
14 views
Cisco 860 router series enabled MAC address filtering & set client count
Using a cisco 860 router, presuming a wireless network has been setup and activated. What commands can be entered to A) enable MAC address filtering, and B) Set the maximum client count
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votes
2answers
36 views
MAC Addresses (in devices) [closed]
In what type of hardware are MAC addresses used besides routers?
For example, could a MAC address be in printer or in a mobile phone?
Yes, I am talking about Ethernet MAC addresses.
Can you please ...
1
vote
4answers
177 views
Cisco Switch: trigger mac-address table update
If I run show mac-address-table dynamic I get a bunch of mac addresses on that table. But due to the aging parameter, I don't see the mac addresses of all possible devices on the network that come ...
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votes
1answer
71 views
Same MAC but different IP on router [closed]
If a device has same mac address but different IP on home router,
is this some sort of error or hacking? What is going on?
I can't attach a pic so I've listed below. Computer name for second doesn't ...
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votes
1answer
108 views
Get the MAC address of another PC by physically connecting its RJ45 cable into a linux ethernet port [closed]
Aim:
To guess the MAC address of a PC without any other thing than a straight RJ45 cable, and a linux laptop.
I figured it would be possible to guess the MAC address of any computer by connecting ...
-1
votes
2answers
141 views
clone ip and mac addr on wlan
what will happen if i clone another pc on a wlan network?
consider the following scenario.
PC1(victim) mac1 ip1
PC2(attacker) mac2 ip2.
I set mac2 = mac1 and ip2 = ip1
i ran the following ...
2
votes
2answers
96 views
Solaris doesn't know which MAC address to use to send an UDP multicast message
I have a pair of Solaris 10 boxes which are supposed to send multicast UDP packets to a group of hosts. One of them works just fine, whereas the other one does not.
The problem with the second ...
0
votes
0answers
12 views
w2k8 r2 single ip dhcp reservation for wireless and wired interfaces [duplicate]
Possible Duplicate:
Reserve a single ip for a wired and wireless NIC of the same machine
I am a bit new to Windows Servers, I'm coming from BSD world.
I have a lot of laptop users at my ...
0
votes
1answer
117 views
Switch CAM table and ARP messages
When the switch CAM table is empty and it receives an ARP message, does it add to the CAM table the source MAC address ?
In Packet Tracer I saw that it does add it, but I read in some book that the ...
-5
votes
3answers
93 views
Can I set my local MAC and IP as my router's so I could sniff it's traffic? [closed]
MAC and IP Address of my gateway/router is:
00-0C-42-54-D5-37
192.168.0.1
My laptop MAC and IP Address is as follows:
00-0C-42-54-D5-35
192.168.0.101
They are both different from each other. I ...
-1
votes
1answer
27 views
Loop Mac-adress to a given ip [closed]
I'm asked to set up a loop on a mac-adres towards ip 127.0.0.1.
I'm not sure what they mean by this?
How do I set up a loop on a mac-adress and what will this do?
thanks,
0
votes
3answers
464 views
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 ...
2
votes
1answer
85 views
Cisco switch:change mac type from dynamic to static in console
How to change mac from static to dynamic in mac-address-table (switch)?I find this official source but still not understand what options I must choose.
Something like this:
switch(config)# ...
-1
votes
1answer
58 views
how to block mac address with portsentry
I use portsentry to block ip address who trying to scanning. Now how do I want to block mac address who trying to scanning. Can I use portsentry, or possibly other tools?
2
votes
4answers
185 views
Newbie questions on MAC and high availability failovers
I am reading about High Availability and I can not understand the following I read:
On failover the primary IP migrates to the backup server BUT so must the MAC address.
Specifically I read that ...
2
votes
1answer
66 views
MAC and IP address text-identicon as avatar
I would like to create something like identicons but not with images but with a unique word for each IP-Addresses and MAC-Addresses.
create an easy to remember alias for a mac address, that is unique ...
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votes
2answers
96 views
Why do we need logical addressing [duplicate]
Possible Duplicate:
Why couldn’t MAC addresses be used instead of IPv4|6 for networking?
If physical address or Mac address is unique why do we need logical addressing?
This because ...
0
votes
2answers
210 views
What is the Cisco iOS (CLI) command to display a WAP's Radio MAC address?
I can't believe I'm unable to find this with teh g00glez or by RTFMing, but does anyone know how to display the MAC address of a Cisco WAP's Radio (wifi connection) from the command line?
show ...
-5
votes
2answers
294 views
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 ...
-2
votes
2answers
110 views
Host spreads wrong MAC Adress of router on the WIFI [closed]
Strange things are going on our network.
Since yesterday a host which is actually not on our subnet spreads wrong ARP Replys on our network. To be precise, only on the WIFI. If I connect my Laptop to ...
1
vote
2answers
129 views
Find IP address from a MAC address
Is there anyway to find the IP address of a MAC address using a command? I was thinking something like arping might work but can't seem to find much information on it.
0
votes
1answer
607 views
Ping server NETBIOS name returns wrong IP and “Destination host unreachable”
Problem server is Windows 2008 R2 VM running on VMWare ESXi 4 host. Single network adapter manually assigned single IP address (192.168.1.11).
When I ping the server from any other network computer, ...
133
votes
13answers
19k views
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), ...
0
votes
1answer
51 views
How to fix Parallels Management Node if DHCP server filters MAC address
I'm evaluating Parallels Server on Mac OS X Lion Server, and during installation it sets up a "Management Node" VM for managing the other VMs. The problem is that my DHCP server is filtering MAC ...
3
votes
1answer
448 views
How do I find out which physical port my ethersvi MAC address corresponds to on a Cisco switch?
I'm doing a layer2 network map (my first) and this is the first virtual mac I've encountered.
From the mac address table of switch1, I have
VLAN 1 6416.8d98.52c0 DYNAMIC Te0/1
and on the ...
-1
votes
2answers
89 views
How does a device search for available wifi networks? [closed]
Say you have a wifi device (D) and a wifi router (R) that have never shared radio waves before, and are within range. How does D discover that R exists? Does R constantly broadcast a message with its ...
4
votes
2answers
575 views
Can I create a pf rule involving MAC address instead of IP?
The title is self explanatory.
I want to create rules in pf running on OpenBSD 4.9 for perticular MAC address, something like
pass in on eth0 from mac 00:04:34:5f:34:33 to mac 34:32:34:06:5e:22
I ...
1
vote
3answers
314 views
Get the MAC addresses of all the machines connected to a LAN when NO machines have got an IP address yet
Here is the real scenario. I have say 4 machines not having any IP address yet connected to a switch. In one of the machines (OS=CentOS), I would install a DHCP server and would provide the other ...
-1
votes
2answers
362 views
Tie SSH key with MAC address
I have a ubuntu server which I scp files to often. It is setup for password-less authentication using a key I have on the server. Is it possible to tie a mac address to the key so that only my client ...
1
vote
2answers
646 views
ISP login, MAC spoofing, WiFi and multiple devices
I have a Tikona Digital Broadband (WiMax based) Internet Connection which allows limited number of devices to be connected at a time and also requires that the users login with username and password ...
1
vote
1answer
68 views
Is it possible to distinguish traffic from different computers from behind a router?
The mac address would be that of the router, I presume. But could I distinguish the ip addresses of the computers behind the router, or could I only see a global ip address that belongs to the router?
...
1
vote
1answer
579 views
Using Ipset and Iptables for MAC address filtering
I use MAC address filtering on my Linux router. Here is what I have done:
iptables -A INPUT -i eth5 -m mac --mac-source 00:07:e9:84:2b:99 -j RETURN #User: Someuser
iptables -A INPUT -i eth5 -j DROP
...
1
vote
2answers
236 views
How can I separate a VMWare Server from the host's MAC Address on my router?
I'm running a Debian LAMP Server in VMWare Player, using a bridged connection.
However, on my router the VM is showing up with the same MAC Address... therefore I can't set the VM to a static ...
14
votes
3answers
865 views
Look up manufacturer based on Mac Address?
I want to incorporate into a piece of software the ability to look up a manufacturer based on a mac address. By googling "mac address lookup" and similar, I have noticed several websites that make ...
1
vote
2answers
117 views
Cloning IP address and/or MAC address for server fail-over
I am currently providing some web applications to my customers (apache/php/mysql on Windows server). I'm looking to provide some sort of fail-over server in the case my server has a hardware failure. ...
0
votes
0answers
104 views
is it possible to change mac address of Network card inside a vps (keeping internet connection)
i want to change the mac address of Network card inside my own vps (virtual private network - windows server 2008 in Switzerland).
is it possible to do this job without losing remote and internet ...
0
votes
2answers
2k views
Query a Windows DHCP server : find MAC from hostname
From my computer, I want to query my DHCP server to find a specific mac adress.
I want to enter the hostname to search, and getting back the Mac address.
Something like :
netsh dhcp server scope ...
-1
votes
1answer
251 views
Assign arbitrary MAC address in VirtualBox VM
Is it possible to assign an arbitrary MAC address to an VirtualBox virtual machine instance? This answer suggests that it is only possible to generate MAC addresses where the most significant byte is ...
7
votes
2answers
2k views
NIC Teaming with Broadcom on HyperV 2008 R2
I have a HyperV cluster made up of 3 hosts. Each host is connected to both of my Nexus 5548 switches running in an etherchannel. LACP on the switch and NIC teaming using Broadcom 802.3ad on the server ...
6
votes
1answer
1k views
Is bonding mode=5 a solution against MAC flapping?
There is two are interconnected Cisco WS-2950T.
By the one GBIC port on first switch connected a first NIC of bonding interface, and by the one GBIC port on second switch connected a second NIC of ...
-4
votes
1answer
154 views
The Public FREE WiFi project [closed]
i am trying to make a server for free wifi access to all customers in my restaurant.
How i plan it:
i have fast server
wireless card
Connectify PRO with wich i will make it as hotspot
so server ...
2
votes
1answer
1k views
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 ...
0
votes
1answer
505 views
Managed Ethernet switch per-port MAC address translation?
Just a shot in the dark here, but I thought I'd ask in case anyone has some ideas:
I've got a testing scenario where some (GUI-less/embedded) IPv6 devices are going to be temporarily plugged into the ...
3
votes
2answers
448 views
Using DHCP with Multi-Homed NICs
I am trying to steer away from our current manual addressing system and embrace the decades-old wonder of DHCP. In our domain and even at my home network DHCP is great - I can use address reservations ...
1
vote
2answers
701 views
MAC Address of device when turned off?
Is it possible to get a list of MAC addresses of devices connected to a network, even though the device is currently turned off? The device has power so I could do a wake-on-lan. I'm trying to get ...
9
votes
2answers
447 views
MAC addresses on dual-NIC mainboards
Here's a weird problem.
We've got a number of devices with dual-NIC mainboards. Some are Realtek NICs, which suck. Some are Intel e1000s, which don't.
I've just noticed on 2 machines, one is an ...
