0
votes
0answers
9 views

/etc/ethers is not being read by dnsmasq

I recently configured dnsmasq on Raspbian, and everything was working perfectly except that /etc/ethers wasn't being read (yes, I did uncomment read-ethers and remember to restart dnsmasq) - the ...
0
votes
1answer
62 views

Know the MAC address in the network without touching the router

I'm new to network programming and I don't know if this is the right place where to ask. I have a small router with a proprietary control panel (= no openwrt or similar). I'd like to know ...
0
votes
1answer
127 views

Use multiple devices with an ISP with captive portal

Here are the facts that will help you understand the scenario: The ISP provides wireless broadband. It gives a device(installed on the roof) from which a LAN wires runs to your computer. The ISP ...
0
votes
1answer
68 views

How can I connect to a router through a switched ethernet network?

I have a computer and a router connected at different positions to a switched ethernet network. I want to connect them as if I had plugged my computer directly into the router. As I understand it, ...
0
votes
0answers
61 views

How can I change the MAC address of hosted network?

I am on a MAC-filterd network. I have a pc and a laptop. I started a hosted network on my laptop. The Laptop has Windows 8. I set up a hosted network on this laptop to connect a smartphone. So the ...
1
vote
2answers
374 views

How to find MAC address of a mobile phone which is in range of my Wi-Fi network but not connected

It is clear that some big malls are tracking some Wi-Fi enabled mobile phones. How can it been done? I have the similar issue: How to get the MAC address of a mobile phone when it comes near to my ...
1
vote
2answers
18 views

Is MAC compulsary for a NIC?

Is it possible for a NIC/ network adapter to communicate with internet if it is not assigned a MAC address ?
2
votes
6answers
317 views

Can I create an Ethernet network without using IP

As I understand from the ISO-OSI model, MAC addresses operate on a different layer than IP addresses. This is clear to me. I can accept that Ethernet (LAN) just does not make use of IP addresses to ...
0
votes
1answer
56 views

Why is the IP and host specified in the /etc/hosts not pinged as expected?

I have an entry in my /etc/hosts file which points to each host on my LAN. I've completed specified all my hosts and corresponding host mac addresses in my Time Warner supplied router. I've created ...
0
votes
6answers
2k views

How does a router find the MAC address of next hop router?

I know that in an Ethernet LAN, the ARP protocol is used to get a MAC address from an IP address. How does my router get the MAC address of another router on an external network if ARP is not ...
0
votes
2answers
104 views

Query MAC address of Powerline Ethernet Adapter

I have a computer connect to the Internet using Powerline Ethernet adapters in this fashion: {Internet} --- [Router] --- [Powerline Adapter A] +++ [Powerline Adapter B] --- COMPUTER Where --- is an ...
0
votes
2answers
60 views

What will happen if a bridge got a wrong mac record?

Let's say there is host H1, H2, switch S1 S2, and S3, bridge B1, B2. It is connected like this: H1 - S1 - B1 - S2 - B2 - S3, | H2 H2 is sending frames to H1. Then, ...
0
votes
1answer
91 views

CE interface in Solaris 10 drops mac address (per ifconfig)

I recently installed Solaris 10 1/13 and proprietary TCP PEP software on a new hard drive within an old Sun v210. When the PEP software starts, the Sun's CE0 interface loses its "ether" address, ...
1
vote
0answers
50 views

Windows - MAC address whitelist on wired network?

In Windows (XP or 7), is it possible to configure either Windows, a software firewall, or network cards such that the computer will only communicate with specific known MAC addresses (e.g. the MAC ...
0
votes
1answer
41 views

Does a network bridge maintain the topo a bridged lan?

As the title suggest. Let's say we have switch A, B, C and A connect to B with bridge D, and B to C with E. A <--> D <--> B <--> E <--> C Does D know the mac of nics ...
2
votes
2answers
437 views

Does a switch know the mac address of other port of a bridge?

Let's say we have switches A and B, they are connected by bridge C. Does A knows about the mac of nics connected to B? Is it true that every time when nic on A want to send a frame to nic on B, the ...
1
vote
1answer
48 views

Is it possible to sync specific router settings across multiple routers?

I recently purchased a second Linksys wireless routers set up on the other side of my home and I am wondering if it is possible to somehow sync particular settings between the two? For instance what ...
0
votes
1answer
651 views

The same MAC address twice on network?

Recently the Wifi network at our small company was messed up in a strange way. When I did a arp -i en1 -a I did in fact see the same MAC address listed twice. When I inquired with a ...
0
votes
0answers
58 views

Duplicate MAC address on two separate Ceton home theater PCs

I have two separate Windows 7 PCs that both use the Ceton InfiniTV 4 PCIe tuner card. The Ceton software bridges the network card with the tuner card. The resulting network bridge on both machines ...
1
vote
1answer
273 views

arp command returning weird info for Apple routers

When I use arp -a command, my two Apple routers (Extreme and Express) return weird results, unlike my other results. The IP address isn't a LAN IP address like the other results and the MAC address ...
1
vote
0answers
57 views

Two wireless extenders with same mac address…How to assign IP address dhcp

I have two wireless extenders, and they both have the exact same mac address (same make and model) Now, they work fine in the network, I just wanted to know how can I assign them specific IP ...
-3
votes
1answer
362 views

How to block a MAC address from connecting with my computer? [closed]

How can I block a certain MAC address from connecting to my computer? In fact this computer is in the LAN, and maybe has a virus.
87
votes
13answers
10k views

What is the exact use of a MAC address?

I understand that IP addresses are hierarchical, so that routers throughout the internet know which direction to forward a packet. With MAC addresses, there is no hierarchy, and thus packet forwarding ...
0
votes
0answers
87 views

Parallels Desktop VM appears as having the same MAC address as host

On Parallels Desktop (OS X) my guest VM (Win 7) is set up to use bridged networking. It would normally show up in my router's DHCP page with its own unique MAC address, and thereby would allow me to ...
3
votes
1answer
220 views

Relation between a packet and a frame over the network

I am learning how networks work and I have a question. What is actually sent over the network? A packet/datagram or a frame? I believe it is a packet. If so, let's say Computer A wants to communicate ...
4
votes
2answers
530 views

How is ARP about two VMs running on VMWare?

I know that systems in network connect together with IP and Mac address ,But insofar as i now all of OSs running on virtual machine use a common network card.I want to know how another systems connect ...
-2
votes
1answer
885 views

Change Broadcom Wireless adapter MAC addres to any address

I need to change my MAC address of Broadcom 802.11n Network Adapter to address of my choice - I need to mask myself as another device in the network. The conflict of the devices will not happen. Under ...
0
votes
1answer
10k views

How to get an IP address from a MAC address? [duplicate]

I have an ipscanner, but not every device is showing up. If I know a device is on the LAN, and I know its MAC address, how can I get it's IP address?
1
vote
2answers
1k views

Easy way to get mac address of network card

I use a lot of scripts that involve the Mac addresses of my network cards. Is there a file I can read or a command that I can use to JUST get the Mac address? I don't want any headers or anything, ...
3
votes
4answers
3k views

Why do we need IP addresses to communicate within the local network segment?

Because MAC addresses are only usable across the local network segment, we use IP addresses to communicate with other segments via routers. Meanwhile, for local targets, ARP is used to translate IPs ...
0
votes
0answers
73 views

Find mobile device on network

I'm trying to write a small program that will poll the network for certain IP addresses or MAC addresses (though MAC doesn't seem to show up past my WAP). My networking isn't very strong but many ...
0
votes
1answer
90 views

Is my MAC monitored? [duplicate]

Possible Duplicate: Is your MAC address revealed when you hit up a website? Is the MAC address traceable to the ISP? Or any website? If so can we hide the MAC address from a second person? ...
0
votes
1answer
399 views

How to share network connection (without mentioned issues) between tho computers with the same MAC address?

Well, I'm using a network connection where IPs are provided by DHCP locked with MAC addresses of the machines. As there are a lot of computer and other devices connected, there isn't enough addresses ...
8
votes
3answers
2k views

How is the MAC address on a computer determined?

While imaging some computers today, I started to wonder... what if two LAN MAC addresses on two different computers matched?... That would cause some problems. I later came to understand that the MAC ...
1
vote
2answers
4k views

How should I reserve IP addresses for my home LAN?

My Netgear router supports MAC-based IP reservation, and I'm setting up my very first home LAN where I want multiple Ubuntu servers to be given dedicated IP addresses. This is a consumer-grade router, ...
2
votes
1answer
634 views

Can an Intel 82577LM Gigabit Network Connection be spoofed?

I need to tell someone my MAC address imminently so I can be added to their router, but I am not at my computer. My laptop is a Dell Latitude E6510, running Ubuntu 12.04 with an Intel 82577LM ethernet ...
-1
votes
2answers
827 views

What's the limit of a home router's MAC address table?

I am considering creating a large LAN (possibly greater than 255 computers) using home wireless routers such as Linksys WRT54G as switches (DHCP off). What, roughly, is the size or limit of the MAC ...
1
vote
1answer
3k views

No IP address given to router until after cloning MAC address from another computer

This problem had me occupied most of the day until I finally solved it just a little while ago. Unfortunately I still don't understand why the problem surfaced in the first place or why my final ...
1
vote
2answers
779 views

Why does my MAC address reset after reconnecting?

I use Ubuntu 12. I'm changing my MAC address with ifconfig wlan0 hw ether xx:xx:xx:xx:xx:xx, which works. However when I restart my connection, my computer resets the MAC address to my original MAC ...
0
votes
1answer
200 views

NAT on MAC-filtered network

My ISP (Hyperion S.A.) provides internet using a UTP cable with MAC filtering. I'm trying to set up a router so that I can connect multiple computers to the network. Most computers would connect ...
1
vote
2answers
232 views

What does `ec` mean in `HWaddr ec`?

When I do ifconfig on my laptop I get HWaddr ec and than an address, this is next to eth0. Note that my IPv4 address only appears next to eth1 so I assume my laptop uses the eth1 network interface. I ...
1
vote
1answer
9k views

What does `Type: IP (0x0800)` in the Ethernet II part of a ping packet mean?

If I ping to another pc in my network I send a packet that consists out of an ICMP part, a IPv4 part and a Ethernet II part. I can see this using the packet analyser 'wireshark'. Now the Ethernet II ...
1
vote
2answers
2k views

What's the MAC Address of my Ethernet adapter?

I have purchased a Dell Inspiron N5010 (with Windows 7). It works all fine but I need to know the MAC Address of the Ethernet adapter. I have tried IPconfig /all, but it does not show my Ethernet ...
1
vote
1answer
773 views

How do I get my original MAC address?

I am using Windows 7 Home Basic. My laptop's MAC address was changed by a hardware support person to facilitate my Internet connection. How can I get my original MAC address.
2
votes
1answer
18k views

How can I determine the MAC address for a NIC in CentOS without using ifconfig?

CentOS 5.5 One of my CenTOS systems recently booted with the following error: "Bringing up interface eth0: Device eth0 has difference MAC address than expected. ignoring." When I run ifconfig -a ...
0
votes
1answer
685 views

Another user in my network is using my IP and MAC address - what can I do?

These days I had problem with my internet connection. I have a static IP connection, but some time ago I couldn't access the internet. A friend helped me and we found out that the IP and MAC-address ...
0
votes
3answers
4k views

Theory regarding MAC and IP address in network packet and frame content?

Okay, network theory and protocol questions for you guys: Assuming a router is using NAT, is a device's MAC address every actually exposed to the Internet? Or, does the router transmogrify (wow, ...
2
votes
6answers
444 views

On a switched network, why do unicast packets not addressed to me reach my NIC when I'm in promiscuous mode?

When I'm connected to a switch, the switch knows which MAC address belongs to which port. So even when I'm in promiscuous mode, why do I receive unicast packets that are addressed to other MAC ...
2
votes
4answers
4k views

A Utility to Spoof MAC addresses in OS X?

Is there a menu bar style tool, or maybe a GUI program that would allow me to switch / spoof MAC addresses for the Airport / WiFi connection on OS X?
2
votes
3answers
2k views

Permanently spoof MAC address on OSX

I'm changing my MAC address for my MacBook's AirPort because the list of devices my router can hold (only 25!) is full. Therefore, I used ifconfig and the tool ChangeMac. Everytime I restart the Mac ...