To bypass such "protection", first we use the passive technique consists in waiting until some eligible clients connect to the point. Such an event will generate packets Probe Request probing and Probe Response answer probing , which contain the SSID of the network and thus reveal its presence. Access to all stations packages Deauthentication cancel authentication. Deauthentication attack , and 5 is the number of packets to be sent. The last option, -a, allows you to specify the MAC address points.
Access, which is our goal. Sending packages Deauthentication forces on all eligible client disconnects and reconnects to the point. To make it easier to observe what is happening, you can program Wireshark create a filter that will let in only packages Deauthentication. Packages Probe Response answer probing , transmitted by point.
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An example of the this session, we can see in the program Wireshark, as shown in the figure below. When the authorized client reconnects to the point. To see all frames sent to and from the point. First, we need to change the configuration of the access point in order to enable MAC address filtering. Then, to the list of authorized MAC addresses you have to add the MAC address of the laptop, which will be the object of attack.
In the case of our example router, the whole process is as follows:. If you enable MAC address filtering to the point. Access will be able to connect only those clients whose addresses are on the list of authorized MAC addresses.
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If you attempt to connect take client whose MAC address is not on the list of qualified, such operation finished in failure. If the client's MAC address is not on the list of authorized clause. Access sends information to the client about the lack of authentication, which looks more or less as shown in the figure below. By using options bssid you will be able to monitor only the selected point. Option -c 11 switches the wireless network adapter on channel 11, or channel, which is running the point. Access and connected thereto.
As a result of execution of such orders you will get a list of MAC addresses of clients associated with the point. From that moment the MAC address that you specified as an argument to the -m option, will be the new "fake" at the interface wlan1mon. How you can see, from this moment, using fake MAC address legitimate customer, you can easily connect to a point. Connecting to the point. Access open access. First, you need to configure point. Wireless Lab network access in order to work in the authentication mode with open access.
In our case the whole operation boils down to include in the Wireless Security wireless security option Disable Security Off collateral. Now connect the points. Here Print screens do not meet because my router no longer has the option WEP.
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First, we need to configure point. Wireless Lab network access in order to work in the authentication mode with shared key. In our case the whole operation boils down to the selection in the Wireless Security WEP and authentication using a shared key Shared Key. Now connect the authorized client to the point. Access using a shared key you selected in step 1. To bypass the authentication of the shared key, you need to start listening and capturing packets transmitted between points. Access and its customers. In addition, you should also keep a file on disk dump all the packages involved in the authentication process.
Good to know that a good solution would be to store individual session packet capture in separate files, so you can calmly analyze individual sessions for a long time after their completion.
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When you are ready you can patiently wait for eligible clients connect to the point. When authorized clients connect to the point. The captured stream key ang. Keystream is stored on the disk in the current working directory in a file called preceded by the word keystream. In our case, the stream key has been saved in a file called keystreamDE Access sends the message to the client about the successful completion of the process. Access faked request association ang. Association Request , which also is successful. If you now check the contents of the log in your point.
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We learned a lot about acting authentication in wireless networks. We learned here that hiding the SSID network is a typical example of the use of methods of protection by secrecy ang. Security by obscurity , which in practice is easy to break and does not provide network virtually any security. Is not it also provides MAC address filtering, because wireless networks MAC addresses authorized clients can be easily intercepted by passively listening for traffic. This is because the MAC addresses of the received packets are not encrypted.
Authentication open access does not actually provide any authentication. Authentication of the shared key is much more difficult to bypass, but using the right tools, it is possible to acquire the captured packet stream key and use it to generate the response to subsequent requests sent by point.
With this solution, you can pass the authentication process and connect to the point. Do zlokalizowania pkt. W terminalu wpiszmy: airodump-ng wlan1mon. Teraz skonfigurujemy pkt. As before, here also do not provide you any images, because they do not have the router WEP encryption options. First, we need to using a Web browser to connect to the management interface point.
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In the case of sample points. In addition, we also need to choose the length of the WEP key. Select WEP key length of bytes. Option Key Type is set to bit, and as WEP, let's use the following string of hexadecimal values: abcdefabcdefabcdefabcdef Of course, in their laboratories you can use other settings. After completing the configuration point.
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Now you can proceed to configure the appropriate computer through which you perform the attack. In the terminal window, turn on the network interface wlan1.
The commands will create the interface wlan1mon operating in monitor mode. To check if the interface wlan1mon was created correctly, you should use the command iwconfig.