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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Unknown MAC in network

A few days ago, I noticed an unknown MAC address in the statistics page of my home router. The OUI lookup yields Cisco as manufacturer. However, I don't have such a device in my network -- actually, I ...
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21 views

unknown mac addres on my connection hotspot to my laptop

I had a ip address and a mac address on my WiFi ,how do I find out who it is? The ip was in Italy I am in Australia
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Few questions about MAC addresses and related material [migrated]

I have a few questions, but all under the same umbrella topic. If I find out a MAC address of a machine on a LAN, and I spoof my MAC to match that particular machine and join their LAN, how will ...
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6answers
112 views

Does MAC address filtering provide security? [duplicate]

Sometimes I need to configure the router and choose which devices can connect to my network (MAC address filtering). For example, limit connections to 3 specific machines. But for an advanced user, it ...
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1answer
54 views

Can the MAC address be “hidden”? ie that the information is not even delivered [closed]

Along with the above question, I would also like to know how can the MAC address be properly changed? Moreover, can it be replaced by a casual sequence or there are specific addresses to use? Finally, ...
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1answer
79 views

Could this piece of code be harmful ?

I just wrote these 2 functions in C#.net and it can get any user's system IP and MAC address. Isn't this harmful since I got help from microsoft documentation. Could these lead to potential damage or ...
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1answer
100 views

Is it good idea to use a access point MAC address as wifi password?

I realized that one network I'm connecting with is using a MAC address of one of its interfaces. If an attacker would know that fact, could he somehow obtain the MAC address wirelessly and break ...
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3answers
95 views

Can WiFi detect you even if you aren't connected

I've read that the way WiFi works is that your computer sends out requests looking for any WiFi it recognizes. I use a MAC spoofer but if there is a WiFi in range before I have time to spoof my MAC ...
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2answers
200 views

Deauth all users on AP except yourself

I am looking to create a small first project to further my self education into infosec. I will be putting this on my Github. My idea is to create a script that automates the process of deauthing all ...
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1answer
66 views

Static MAC address on Switches and routers

I was having a discussion with a friend of mine in IS industry and he insisted that setting static MAC addresses (i.e. port security) on devices were a effective way to block MAC spoofing. I found ...
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1answer
115 views

What attacks or exploits are possible when MAC address, IP, and Port of a WiFi access point are known? [closed]

I just accepted a position at a small firm and was testing the previous WiFi setup for flaws and exploits that were possible. We have two AP's for business and guest connections, everything checks out ...
3
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2answers
92 views

Is another MAC address generated when a wireless is created using the same device for LAN?

I notice that the devices listed on the wireless system listed a MAC address that is supposed to be the router but it is not the same # that is on the router case. It differs by one one digit, ...
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2answers
142 views

How to find the ip address of a wifi router while I have it's MAC address?

I have a wifi scanner which shows me the MAC addresses of the wifi routers nearby. It displays SSIDs in one column and MAC addresses in another column. I want to know the ip address of the router. ...
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1answer
137 views

Mac overflow (flooding)

On a recent switch, is mac flooding still a vulnerability to be careful of? If that attack is patched on most of them, then on which type of switch is it still vulnerable?
3
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1answer
706 views

How can Port Stealing be used as a MiTM attack?

I read about and tried a lot of MiTM attacks but I just don't get how Port Stealing can be used as a MiTM attack. In my understanding one can "steal" a Port by sending Ethernet Frames faking the ...
10
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4answers
4k views

How to break MAC address filtering?

If a MAC filter prevents you from connecting to a network, how can you break it or include your device's MAC in that filter?
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1answer
164 views

Locking Linux system to work on certain hardware only

Is there a way of locking a Linux system to work with a specific (pre-defined) hardware only? I am developing a commercial product and want to make it a bit harder for someone to clone the whole ...
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0answers
19 views

Is Android WLAN MAC Address vulnerable? [duplicate]

What can a person do if he/she has WLAN MAC Address of my Android Device? What can be done to save my personal information?
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1answer
169 views

Does a VPN Provider Know My MAC Address?

I know MAC is a layer 2 address, so it's only sent to the next router in the chain. Does a VPN provider get that information when I'm connected to their service? Is their router considered the next ...
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5answers
201 views

Reasons for gathering MAC address list

Suppose there is a password-secured WiFi network that exists to provide users with Internet access only. Edit: Consider a guest/mobile-BYOD network as an example. Since filtering access to a WiFi ...
4
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1answer
259 views

How does detecting promiscuous mode using an ARP test work?

I have read that we can detect whether a system is running promiscuous mode by sending out an ARP request with a fake broadcast address e.g FF:FF:FF:FF:FF:FE.This will be blocked by all NIC's ...
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1answer
81 views

MITM sniffing packets

I fail to understand how a MITM attack sniffs packets and modifies them.In the case of ARP spoofing although the attacker has spoofed the MAC address of a host, how does he modify it as the IP layer ...
2
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2answers
182 views

Is there any way to determine the location of a laptop based on its MAC address or serial number?

If I have the MAC address and S/N of a Lenovo 3000 Laptop, is there some way for me to find exact street location of this laptop ? This machine was stolen from me last year and was my back up machine ...
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2answers
465 views

How can I find out who is behind a Mac address? [closed]

I was connecting a bluetooth device to my tablet and noticed that when scanning for the devices one "device" was actually a Mac address. We (me and my husband) have been under a hacker attack already ...
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1answer
708 views

How does Amazon Fire TV know my name/account? [closed]

I bought a Fire TV stick and inserted it into the HDMI-port of my TV. I was presented with a dialog to select my wireless router so it can connect online. Just after I did that, it asked me if I am ...
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1answer
2k views

Tracing stolen android tablet via MAC address [closed]

I lost my tablet , but I can see that the tablet is connected to the network on my router: :So I know the MAC address but I am unable to trace my tablet using this information and I am running out of ...
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2answers
2k views

Is my WiFi connection protected?

In my college the WiFi is open type connection and before I connect to it using my laptop with windows 8.1, it displays message "Other people might be able to see info you send over this network " ...
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2answers
205 views

Can changing a MAC address give an attacker more leverage in a network?

Security lessons force us to use limited users (Standard User) on Windows networks. I found that an administrator account can change his MAC address from Control Panel\Network and Internet\Network ...
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1answer
549 views

At Starbucks, is my MAC address sent when I accept the terms of service for free Wifi? [closed]

Recently, I overheard by chance some technically savvy guys saying that when you accept the terms of service in order to use the "free" WiFi at Starbucks (which you pay for when you buy some coffee), ...
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1answer
331 views

How to retrieve the MAC address of a remote IP [closed]

I have an IP address, and I want to find the corresponding MAC address. The IP address is in the same city, so we're connecting to the same network. How do I find the corresponding MAC address?
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2answers
146 views

Is there any security in locking down a router by MAC address for wired clients?

At our office we have a router on the table, and the powers that be want to lock it down by MAC address to stop people from plugging in cables for other computers i.e. intruders. Given that resetting ...
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1answer
205 views

help identifying an IP address from email sent from my gmail account

Someone sent the following email from my gmail account. I believe it was hacked and if I can find the IP address I may be able to identify the person who did it. Here is the information. Please let me ...
17
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0answers
2k views

What can the school do with my MAC address? [duplicate]

At my school they are requesting my MAC address so that I can use the schools Wi-Fi. Now I understand that the school can see what sites I am going to while I'm at school. But can the school see what ...
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1answer
157 views

Is the MAC address encapsulated in the Internet packets? [duplicate]

This might be a stupid question, but what is the range of the MAC addresses? Are these somehow leaking to the Internet with packets that a user sends (so they know where to return)?
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1answer
179 views

Identification info that my wireless card sends to the (wifi) network

Are any other identification information that my wireless card sends to the Wi-Fi network apart from the MAC address ? If so are they changeable? Let's say, for example, that I connect to a Wi-Fi ...
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2answers
4k views

Can 2 devices have same host-name on same network? [closed]

I can see one unknown android device on my network, but it has same host-name as my android device. QUESTION 1.Is this possible that on same network two different devices can have same host-name ? ...
81
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7answers
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Is it dangerous to post my MAC address publicly?

When posting questions, it is often quite useful to include debug output. However, it sometimes include the MAC address of my laptop, router, or both. What are the possible dangers of releasing these ...
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2answers
4k views

Can viruses steal MAC addresses? Why is MAC address bad?

Can downloaded executables get my MAC address and send it to somewhere else? Also, why is it a security risk to have someone else use my MAC address, considering that it can be spoofed?
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2answers
3k views

Is it possible to retrieve MAC address of a host using Tor?

I know that Tor is used for anonymity while browsing in the Internet. I heard that by using Tor, it is possible to hide my IP. But is it possible to hide my MAC address also?
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1answer
506 views

Is there a way to identify the location of a person trying to intrude your wifi network? my wifi router is picking up his attempts

Aug 30 20:28:09 dropbear[6799]: Child connection from ::ffff:5.10.69.82:38463 Aug 30 20:28:11 dropbear[6799]: login attempt for nonexistent user from ::ffff:5.10.69.82:38463 Aug 30 20:28:12 ...
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2answers
1k views

Can attackers be traced if they used public WiFi

I always thought it's possible to track attackers unless they try to hide their identities using some form of "physical" disguise. No matter how many proxies you use even TOR seems to be traceable by ...
5
votes
2answers
1k views

Is it possible to ping a LAN card through its MAC address? [duplicate]

As you can start a PC through its 'WAKE ON LAN' feature on private networks, can you trace someone's online status through their MAC address over the internet ?
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1answer
350 views

How can spoofing a certain MAC address enable sending probe requests that I was never connected to?

I was wondering how could my computer that uses a spoofed MAC address be sending probe requests for APs that I was never connected to? Note: The other computer with the original MAC address I was ...
29
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3answers
14k views

How can a webpage get the MAC address?

I was logged on to my router and filling out some information. I clicked a button and a field was automatically filled in with my computer's MAC address. How is this possible? Does it present a ...
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1answer
671 views

How can I trace MAC address of not asosciated devices in my WiFi network?

I'm looking for hints to solve my problem. I would like to trace all devices that are in my surroundings. I know how do it when someone already access to my WiFi network, but I'm also interested to ...
4
votes
5answers
4k views

Is MAC address filtering effective on a wifi router? [closed]

I want to improve the security of my home wifi. My neighbor wants to crack my Wi-Fi password with a nutcracker. I tried to activate the protection by MAC address, but now my laptop and smartphone ...
1
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1answer
2k views

MAC-address restricted port forwarding

I have an ASUS RT-AC68U router and would like to set up port forwarding, but I would like to restrict which MAC addresses can connect through that port. My use case is that I'll have a live camera, ...
23
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1answer
1k views

Does TCP/IP protocol offer a reliable way of determining who the actual sender was?

So I'm just poking around the TCP/IP protocol using a Ruby library called PacketFu, and it seems to me that in each packet, it is possible to set all of the following Source IP Destination IP Source ...
5
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6answers
5k views

What can my university see if they have my MAC address?

when i first got to my university i had to provide my MAC address to get access to the internet. What i want to know is what information can they get from having my MAC address linked to my name. i ...
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1answer
518 views

DOCSIS modem only authenticated by MAC?

Is a DOCSIS modem only authenticated by the CMTS by a MAC address or are there any other AAA techniques? In that case, how do I prevent other customers from spoofing my modem's MAC address? Cable ...