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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Capture a packet at the MAC layer [migrated]

I want to implement a security solution similar to MACsec that captures a packet in its entirety (including the MAC header) at an intermediate network node (e.g linux based switch), perform some ...
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2answers
74 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
84 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
72 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
71 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
201 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 ? ...
74
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6answers
11k views

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
947 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
322 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
294 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
221 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 ...
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2answers
401 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
101 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 ...
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2answers
5k 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
329 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 ...
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5answers
3k 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 ...
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1answer
336 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, ...
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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 ...
4
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6answers
1k 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
188 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 ...
6
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2answers
1k views

Devices with cryptic names and Chinese ip addresses connected to my router

Please see image. Does anyone have any idea of whats going on? They come and go as attached devices in my attached devices list. I also attached my routers log for you all to see. ...
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1answer
887 views

How the shopkeepers are getting MAC address of wifi enabled smartphones

It is clear that some big mall's are tracking all the wifi enabled mobile phones before they are connected to the network..how can it been done? I have the similar issue.. how to get the MAC address ...
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1answer
1k views

How to prevent DHCP Starvation attack?

All this while, I assumed that switchport security is enough to prevent DHCP dos attack. If I set it maximum 1, there can be no more mac addresses packets. But, a friend told me that using the tool, ...
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1answer
42 views

Allow access only for some Mac Ids

There is an application which shows a login page. However, I do not want people to login through any machine. I want to restrict login to a few Mac Ids. Is there a way to do this? There is probably a ...
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6answers
2k views

Defamatory post - obtaining evidence tracing perpetrator right to his laptop

A month ago, someone posted an ad with my personal details, including my home address, my phone number and my photo on an ad with very a very defamatory write up. What followed was a week of calls ...
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1answer
235 views

Is it possible to block requests for my MAC address? [closed]

If a java application makes a request for my MAC address can I block it in any way? Are there any security programs which can do this? -- What I am asking is if there is anyway I can prevent Java ...
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3answers
6k views

Getting access to MAC address of access point from a device wired to the network

My home network consists of a router (with wired and wireless connections), and a separate access point used to repeat the router wireless signal. A device is further wired to the access point; it ...
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0answers
25 views

MAC changer and VPN can be trusted? [duplicate]

I must spoof my identity for some reason. Are Technitium Mac Address Changer App on windows and VPN is a trusted way to be anonymous?
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4answers
1k views

Security provided through MAC filtering: Wired vs. Wireless Networks

My question refers to the following article on Wikipedia: MAC Filtering. The article states: MAC filtering is not effective control in wireless network as attackers can eavesdrop on wireless ...
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2answers
644 views

Is it possible to detect when a device has been MAC filtered on a Wi-Fi network?

Is it possible to detect when a device has been MAC filtered on a Wi-Fi network? I don't know if it's in the 802.11 standard, or if it's just implemented by ignoring the client network packets.
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2answers
171 views

Is it possible to assign MAC-address-specific passphrases for a WiFi network?

Private network access security can be defined by a unique WPA2 passphrase to grant access to devices and MAC address filtering to control authorized devices. Nowadays mobile devices are legion, so if ...
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1answer
365 views

Is it possible to spoof the mac address of a wireless adapter so that windows sees the spoofed mac as the physical?

I know that its possible to spoof a mac address out to a network. But is it possible to spoof the address, so that the Windows operating system and applications running on Windows see a spoofed ...
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1answer
333 views

Sending a skype message by ip or mac addresses [closed]

If I know someone's ip, mac addresses and a computer name in a local wifi network, and also that there is skype running on their computer (and port), can send them a message through skype? Can I find ...
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2answers
546 views

MAC spoofing preventing connection

I'm attempting MAC spoofing on a network I own. I'm connecting to a NETGEAR WNDR4300 wireless router from an Ubuntu Linux machine. The network uses WPA2-PSK [AES] security. Connecting to the network ...
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2answers
2k views

Storing the MAC Address of a computer in Active Directory

I’m considering enabling WoL (Wake on LAN) on the workstations on my network. In order to boot a workstation using WoL I require its MAC address. I could store the MAC address in a database, however ...
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2answers
1k views

In a LAN environment, can you fake the IP address while also being able to receive the response?

Looks like nmap could fake source IP address, and getting a valid response, but only in LAN environment. I'm not sure how it works, here's my thought, You created a packet with fake IP address and a ...
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1answer
3k views

stay anonymous in wireless network even if you are part of it

Even though router knows you are always there, what are some other things we can do rather than changing MAC address Ok the thing is there is wireless access point(router) and a user(owner of router) ...
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1answer
613 views

Disabling built-in Wi-Fi adapter and protecting Wi-Fi's MAC address on a laptop

I have an XP laptop with Wi-Fi issues - it connects / disconnects intermittently. Anyway, I bought a USB Wi-Fi that works well. My security question are: Is there a way to completely disable the ...
18
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3answers
9k views

Router password vs MAC filtering?

I just bought a Galaxy S4, and it didn't connect to the WIFI in my house (I have a 14$ router). After a bit of testing, I've decided to leave my connection open without a password, but added the ...
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3answers
12k views

Can a website still detect my real MAC address even if I use different virtual machine each time I visit the website?

Suppose I use a proxy and a different virtual machine each time I visit a particular website, will a website still be able to detect my MAC address and/or uniquely identify me? Assume that the website ...
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2answers
2k views

How to allow only some specific computer systems to access website? [duplicate]

I need a process to allow only certain computer systems access to the website irrespective of the network they are using. Much like a Licensing system, I can provide a private key or something ...
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2answers
1k views

How can Bank of America tell that I'm logging in on a computer I haven't used with them before?

When you sign into Bank of America for the first time on a computer that you haven't used with them before, they detect this and force you to answer one of your security questions. I think I've seen ...
3
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1answer
411 views

What general security issues could arise from using UUID version 1 which exposes the MAC address?

I'm coding GENERIC_WEB_SERVICE, which could potentially be running as multiple instances on multiple machines down the line. I'm using UUIDs as identifiers, and haven't settled yet on whether to use ...
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1answer
2k views

Will my USB modem send my MAC address to my ISP?

Will a USB modem send my computer's MAC address to the Internet service provider when I am using it? I mean, if two computers use the same USB modem will the Internet service provider know that two ...
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1answer
4k views

MAC spoof not working?

I have set up our home router to only allow certain MAC addresses to connect. One way to test if the filter is working is to spoof a MAC address not in the list and trying to connect to the router. So ...
3
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3answers
833 views

unknown MAC address in the LAN, DD-WRT router

I am using a linksys router with DD-WRT firmware with a WiBro internet connection, the ISP uses a hub with multiple user connected to it. The issue is that an unidentified MAC address seems to pop up ...
3
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1answer
844 views

Identifying device based on the MAC address

Suppose we know that MAC address A belongs to a certain device (say an iPhone 5), and MAC address B also belongs to an iPhone 5. If we have a MAC address C which is in between A and B, does this ...
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1answer
492 views

How to write Snort rules based on MAC address?

I would like to create Snort rules based on MAC addresses instead of IP addresses. Most devices on the network are DHCP assigned, and I would like to ignore certain traffic (ex: Dropbox) for some ...
2
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1answer
2k views

How to view which mac addresses are connected to some AP?

I set up an open AP. I know I can view mac addresses of connected users via AP's console (local console). this is not what I need. I use tool like Netstumbler or inSSIDer on my Win 7 machine to see ...