User Tools

Site Tools


airtun-ng

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
Next revision
Previous revision
airtun-ng [2009/08/17 00:50]
aspj Added chapter with WDS/Bridge mode instructions and examples
airtun-ng [2015/04/12 23:15] (current)
mister_x Updated usage.
Line 8: Line 8:
 In order to perform wIDS data gathering, you must have the encryption key and the bssid for the network you wish to monitor. Airtun-ng decrypts all the traffic for the specific network and passes it to a traditional IDS system such as [[http://​www.snort.org|snort]]. In order to perform wIDS data gathering, you must have the encryption key and the bssid for the network you wish to monitor. Airtun-ng decrypts all the traffic for the specific network and passes it to a traditional IDS system such as [[http://​www.snort.org|snort]].
  
-Traffic injection can be fully bidirectional if you have the full encyption ​key. It is outgoing unidirectional if you have the PRGA obtained via [[korek_chopchop|chopchop]] or [[fragmentation]] attacks. The prime advantage of airtun-ng over the other injection tools in the aircrack-ng suite is that you may use any tool subsequently to create, inject or sniff packets.+Traffic injection can be fully bidirectional if you have the full encryption ​key. It is outgoing unidirectional if you have the PRGA obtained via [[korek_chopchop|chopchop]] or [[fragmentation]] attacks. The prime advantage of airtun-ng over the other injection tools in the aircrack-ng suite is that you may use any tool subsequently to create, inject or sniff packets.
  
 Airtun-ng also has repeater and tcpreplay-type functionality. ​ There is a repeater function which allows you to replay all traffic sniffed through a wireless device (interface specified by -i at0) and optionally filter the traffic by a bssid together with a network mask and replay the remaining traffic. ​ While doing this, you can still use the tun interface while repeating. ​ As well, a pcap file read feature allows you to replay stored pcap-format packet captures just the way you captured them in the first place. ​ This is essentially tcpreplay functionality for wifi. Airtun-ng also has repeater and tcpreplay-type functionality. ​ There is a repeater function which allows you to replay all traffic sniffed through a wireless device (interface specified by -i at0) and optionally filter the traffic by a bssid together with a network mask and replay the remaining traffic. ​ While doing this, you can still use the tun interface while repeating. ​ As well, a pcap file read feature allows you to replay stored pcap-format packet captures just the way you captured them in the first place. ​ This is essentially tcpreplay functionality for wifi.
Line 16: Line 16:
 ===== Usage ===== ===== Usage =====
  
- usage: airtun-ng <​options>​ <replay interface>​+ Usage: airtun-ng <​options>​ <replay interface>​
  
       *-x nbpps : maximum number of packets per second (optional)       *-x nbpps : maximum number of packets per second (optional)
-      *-a bssid : set Access Point MAC address (mandatory)+      *-a bssid : set Access Point MAC address (mandatory). In WDS Mode this sets the Receiver
       *-i iface : capture packets from this interface (optional)       *-i iface : capture packets from this interface (optional)
       *-y file : read PRGA from this file (optional / one of -y or -w must be defined)       *-y file : read PRGA from this file (optional / one of -y or -w must be defined)
       *-w wepkey : use this WEP-KEY to encrypt packets (optional / one of -y or -w must be defined)       *-w wepkey : use this WEP-KEY to encrypt packets (optional / one of -y or -w must be defined)
-      *-t tods : send frames to AP (1) or to client (0) (optional ​defaults to 0)+      ​*-p pass : use this WPA passphrase to decrypt packets (use with -a and -e) 
 +      *-e essid : target network SSID (use with -p) 
 +      ​*-t tods : send frames to AP (1) or to client (0) or tunnel them into a WDS/Bridge (2)
       *-r file : read frames out of pcap file (optional)       *-r file : read frames out of pcap file (optional)
 +      *-h MAC  : source MAC address
 +      *-H      : Display help.  Long form --help
 +
 +WDS/Bridge Mode options:
 +  *-s transmitter : set Transmitter MAC address for WDS Mode
 +  *-b : bidirectional mode. This enables communication in Transmitter'​s AND Receiver'​s networks. Works only if you can see both stations.
  
 Repeater options (the following all require double dashes): Repeater options (the following all require double dashes):
Line 30: Line 38:
   *- -bssid <mac> : BSSID to repeat. ​ Short form -d.   *- -bssid <mac> : BSSID to repeat. ​ Short form -d.
   *- -netmask <​mask>​ : netmask for BSSID filter. ​ Short form -m.   *- -netmask <​mask>​ : netmask for BSSID filter. ​ Short form -m.
 +
  
 ===== Scenarios ===== ===== Scenarios =====
Line 49: Line 58:
    ​FromDS bit set in all frames.    ​FromDS bit set in all frames.
  
-You notice above that it created the **at0** interface. Switch to another console ​sesssion ​and you must now bring this interface up in order to use it:+You notice above that it created the **at0** interface. Switch to another console ​session ​and you must now bring this interface up in order to use it:
  
    ​ifconfig at0 up    ​ifconfig at0 up
  
-This interface (at0) will receive a copy of every wireless network packet. The packets will have been decrypted with the key you have provided. ​ At this point you may any tool to sniff and analyze the traffic. ​ For example, tcpdump, wireshark or snort.+This interface (at0) will receive a copy of every wireless network packet. The packets will have been decrypted with the key you have provided. ​ At this point you may utilize ​any tool to sniff and analyze the traffic. ​ For example, tcpdump, wireshark or snort.
  
 ==== WEP injection ==== ==== WEP injection ====
Line 167: Line 176:
 This is how to setup airtun-ng for this scenario: This is how to setup airtun-ng for this scenario:
  
-   ​airtun-ng -t ath0 -BB:​BB:​BB:​BB:​BB:​BB -a AA:​AA:​AA:​AA:​AA:​AA -i ath0+   ​airtun-ng -t ath0 -BB:​BB:​BB:​BB:​BB:​BB -a AA:​AA:​AA:​AA:​AA:​AA -i ath0
  
 If you are able to see both sides of a WDS/Bridge network, you can enable bidirectional mode. This enables communication with both endpoint'​s networks. Be aware that bidirectional mode keeps track of clients behind each node in a list in memory, since it needs to know to which of the two endpoints it needs to send a packet to reach a certain client. If you use an embedded system, or there are large amounts of clients connected, this may slow down your machine. If you are able to see both sides of a WDS/Bridge network, you can enable bidirectional mode. This enables communication with both endpoint'​s networks. Be aware that bidirectional mode keeps track of clients behind each node in a list in memory, since it needs to know to which of the two endpoints it needs to send a packet to reach a certain client. If you use an embedded system, or there are large amounts of clients connected, this may slow down your machine.
  
-   ​airtun-ng -t ath0 -BB:​BB:​BB:​BB:​BB:​BB -a AA:​AA:​AA:​AA:​AA:​AA -i ath0 -b+   ​airtun-ng -t ath0 -BB:​BB:​BB:​BB:​BB:​BB -a AA:​AA:​AA:​AA:​AA:​AA -i ath0 -f
  
 WDS mode is fully compatible with WEP encryption, so you can use the -w and -y flags as usual. WDS mode is fully compatible with WEP encryption, so you can use the -w and -y flags as usual.
Line 197: Line 206:
  
 This loads the "​tun"​ module. ​ You can confirm it is loaded by running "lsmod | grep tun"​. ​ If it does not load or there are problems, running "​dmesg"​ and reviewing the end should show errors, if any. This loads the "​tun"​ module. ​ You can confirm it is loaded by running "lsmod | grep tun"​. ​ If it does not load or there are problems, running "​dmesg"​ and reviewing the end should show errors, if any.
 +
 +==== Error creating tap interface: Permission denied ====
 +
 +See the following [[faq#​why_do_i_get_error_creating_tap_interfacepermission_denied_or_a_similar_message|FAQ entry]].
 +
airtun-ng.1250463050.txt.gz · Last modified: 2009/08/17 00:50 by aspj