81
votes
Accepted
School asked us to submit our MAC addresses
I think you should ask why they want to use the MAC address, not necessarily for privacy reasons; "why do you need the MAC Address?" I think it's a reasonable question to ask them.
Firstly, they will ...
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70
votes
Unknown suspects hijacking our WiFi. Caught their MAC addresses
Physically finding them is not easy. If you are really willing to catch them, buy a couple ESP8266 modules (search eBay for them), research this project a little, drop a couple modules around and you ...
- 53.5k
63
votes
Bypass MAC address internet time filtering?
You can defeat your brother's access restrictions, either by a timing-attack or side-channel attack.
In a timing-attack, you wait for a sufficient time, your brother will remove the MAC filtering for ...
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52
votes
Accepted
Identification of a laptop using a spoofed WiFi MAC address
Detecting and blocking spoofed MAC addresses is a losing game. As Toni pointed out, the attackers could just start copying MAC addresses of real devices so you would have no practical way to stop them....
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42
votes
Unknown suspects hijacking our WiFi. Caught their MAC addresses
So the question is how to find their physical address location based on the mac address?
You can't, IP addresses and MAC addresses do not carry any location information.
Your access point may be ...
- 6,898
33
votes
School asked us to submit our MAC addresses
For a school, having all student device MAC addresses (unique hardware identifier) is a way to filter out a lot of unwanted traffic from the LAN. Even if outside devices from non-students spoof a ...
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26
votes
School asked us to submit our MAC addresses
Well, the school already has your MAC address since you've connected to their access points in the past. What they don't (necessarily) know is the association between your MAC addresses and your real ...
- 465
20
votes
Unknown suspects hijacking our WiFi. Caught their MAC addresses
Change your WiFi Password - make sure it's strong.
Make sure you are using WPA/WPA2
Check your "plugged in" devices. They show up in the MAC list as well, and just because something says "Android" ...
- 357
19
votes
Bypass MAC address internet time filtering?
You could change your MAC address to something different. If he simply blacklisted your MAC addresses, it should be sufficient enough to generate a random address. If he whitelisted his own addresses, ...
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18
votes
Identification of a laptop using a spoofed WiFi MAC address
Just use authentication like a great deal of local coffee shops here do.
Their usual strategy is to change the password every day and post it on a note near the cash desk. Or print it on the receipts. ...
- 3,488
17
votes
Unknown suspects hijacking our WiFi. Caught their MAC addresses
MAC addresses are tied to equipment manufacturers. So MAC address can tell you the vendor that produced the device that is accessing your network, and not a bit more. You can use that page for a ...
- 397
10
votes
Accepted
Cannot identify or block unknown MAC addresses
Four possibilities come into mind for your slow internet.
Your neighbors are using your wifi (e.g., you are using weak security on your router like WEP or are using very weak guessable passwords - ...
- 39.3k
10
votes
Identification of a laptop using a spoofed WiFi MAC address
This is a theoretical technique and may not be practical without putting in sufficient effort to develop and test your own detection tool. I'm leaving this here because it is a possible technique and ...
- 66.4k
8
votes
Accepted
Cannot identify or block unknown MAC addresses (Part 2)
Those 5 MAC addresses all are in the 00:FF domain, which are traditionally used for bridged/routed adapters. They aren't assigned to any individual vendor by the IEEE. In this case, you have two ...
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8
votes
Accepted
How to find remote routers mac address?
One important followup question is: Which MAC address? The router will most likely have at least one MAC address for the WAN side and one for the LAN side.
Should the vendor have chosen to create ...
- 5,482
8
votes
Accepted
What does two IP-addresses using the same MAC-address mean?
I would read your logs as follows:
192.168.1.64 is the IPv4 address the physical interface with MAC 00:1f:f3:5a:77:9b is using. I would tend to assume the IP was handed out via DHCP, but you would ...
- 3,651
7
votes
Accepted
MAC overflow (flooding)
Yes, this it still is a threat and this is why:
MAC flooding is based on the overflow of the CAM Table (Content Access Memory). The CAM table assigns physical ports to MAC addresses. The CAM table ...
- 4,313
7
votes
Accepted
MAC randomization for Bluetooth?
For bluetooth low energy (BLE), this site mostly explains the problem:
https://blog.bluetooth.com/bluetooth-technology-protecting-your-privacy
To safeguard user privacy, manufacturers can make use ...
- 301
5
votes
Accepted
Deauth all users on AP except yourself
A rather quick Google search for "python wifi deauth" reveals several results for your question.
WiFi Jammer seems to do the job:
Continuously jam all wifi clients and access points within range. ...
- 5,841
5
votes
Unknown suspects hijacking our WiFi. Caught their MAC addresses
If you want to find the source you need to triangulate the wifi signal with an access point, either the router itself or perhaps something small like a raspberry pi or laptop configured to look like ...
- 151
5
votes
Bypass MAC address internet time filtering?
Reset the router.
MAC blocking is not an effective means of censoring internet access if you already have physical access to the router, which is likely since you live in the same home.
There is ...
- 1,705
5
votes
Accepted
Are there security reasons for prohibiting universal mac address modification?
It is difficult to answer this question, because we don't have any insights on the way of thought of those at MicroSoft.
However, as you said, there are two types of MAC's: a universally-administered ...
- 2,055
4
votes
Accepted
How can Port Stealing be used as a MiTM attack?
The behavior you describe is true. However, the trick is that the attacker software will not keep the stolen port for itself, it will proceed in the following loop:
Steal the port,
Receive some data,
...
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4
votes
Is it dangerous to post my MAC address publicly?
Some Belkin routers set a default WPA password that could easily be derived from the router’s MAC address, and if you have one of those routers, then publishing your MAC address is an obvious security ...
- 10.2k
4
votes
With Nmap it is possible to scan according mac address?
This is a one-liner to find the IP of a Synology NAS by MAC address in the local network:
nmap -sP 192.168.1.0/24 | grep -B 2 "00:11:32:XX:XX:XX" | head -n 1 | cut -d " " -f 5
...
- 41
4
votes
Accepted
With Nmap it is possible to scan according mac address?
Keep in mind that nmap is an IP based scanner. Based on the information that you have provided, I would suggest using nmap to perform a host discovery i.e. identifying active hosts in a network. This ...
- 7,417
4
votes
Accepted
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.
That depends on the configuration of both the access point (AP) and your device.
Most ...
- 44.6k
4
votes
Cannot identify or block unknown MAC addresses
Before you spend more time trying to fix the anomalous MAC address issue I'd suggest verifying it's the problem. Can you use wireshark to actually check that traffic is passing to/from the devices?
(...
- 41
4
votes
Accepted
Is there any way to scan a host with nmap without arp respond?
Nmap by default performs ARP scan at the discovery stage but if you want to disable it explicitly then you have to specify --disable-arp-ping. As you said that You have specified -Pn then it's for ...
- 106
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