Hello, I want to use wpa_supplicant to encrypt a ad-hoc network with WPA. Each device is also a router (using babeld). With encryption the support for unicast packages drops. I've used tshark to monitor the traffic of two devices (A and B): when A wants to ping B it broadcasts a ask for the MAC-address of B. B sends the MAC-address successfully but A doesn't care. I see the reply of B in tshark (running on B), but the ARP-package doesn't show up on tshark on A. this only happens with wpa_supplicant enabled. The wpa_supplicant.conf looks like this: ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev update_config=1 # use 'ap_scan=2' on all devices connected to the network ap_scan=2 network={ ssid="mesh-wpa" mode=1 frequency=2432 proto=WPA key_mgmt=WPA-NONE pairwise=NONE group=TKIP psk="secret passphrase" } and the /etc/network/interfaces like this: auto lo iface lo inet loopback iface eth0 inet dhcp allow-hotplug wlan0 iface wlan0 inet static address 192.168.13.37 netmask 255.255.255.255 # Load WPA-Supplicant for WPA in Ad-Hoc Mode wpa-driver wext wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf iface default inet dhcp I'm using two RaspberryPis with Raspbian Linux 3.6.11+. Here is the device descriptor of the wlan usb stick: lsusb -v -d 0cf3:9271 - http://pastebin.com/nfvVp80u the output of wpa_supplicant -i wlan0 -D wext -c /etc/wpa_supplicant/wpa_supplicant.conf brings: ioctl[SIOCSIWPMKSA]: Invalid argument ioctl[SIOCSIWENCODEEXT]: Invalid argument ioctl[SIOCSIWENCODEEXT]: Invalid argument wlan0: Trying to associate with SSID 'mesh-wpa' ioctl[SIOCSIWGENIE]: Operation not supported wlan0: Association request to the driver failed wlan0: CTRL-EVENT-CONNECTED - Connection to 00:00:00:00:00:00 completed (auth) [id=-1 id_str=] wlan0: Trying to associate with SSID 'mesh-wpa' ioctl[SIOCSIWENCODEEXT]: Invalid argument ioctl[SIOCSIWENCODEEXT]: Invalid argument ioctl[SIOCSIWGENIE]: Operation not supported wlan0: Association request to the driver failed wlan0: CTRL-EVENT-CONNECTED - Connection to 00:00:00:00:00:00 completed (reauth) [id=0 id_str=] -Mark -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html