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• Kubuntu 12.04 Won't let me search for wireless network

  - by Bora George

  Hello I'm running a brand new Kubuntu 12.04 single boot on my laptop, this is the first time I tried connecting to a wireless network. I tried using the network manager app allready on the task bar, but it doesn't let me tick the column to search for wireless networks, i.e. it will untick it automaticaly, it's dissabled by the software or the hardware, but I doubt it. I've tried searching the other questions on this site, and I can't see anything which helps with my problem. I know my wireless card is a Atheros AR9285, I don't think I installed any firmware for it, I'm sorry I can't offer more info but I'm completely new to networking and all that I have for the network to connect to are it's name and password of course.

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• Ubuntu 12.04 lts cannot build a wireless connection

  - by Jupiterr

  Hi i just got a new notebook and it came with ubuntu 12.04 lts operation system. But it can't make a wireless connection. I plugged in my Ethernet cable and i can reach the Internet with it but I need wireless connection so much. This is the first time I'm using ubuntu so i'm really confused. I can see wireless networks (including mine) but i cannot use them. It seems like it's establishing a connection but soon it gives up. Please help, I don't have much time for this and I do not have any idea about operation systems.

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• Slow wireless about 1/3 bandwidth of wired from cable modem

  - by Rhino

  HP DV6000 Wireless G Broadcom Netgear WNDR3400 router properly configured. Windows laptops using wireless G and N are considerably faster than mine. 12.04 LTS, all restricted drivers and all up to date. 50Mbps wired and 9-21 Mbps wireless on Ubuntu. 00:14.0 Bridge [0680]: NVIDIA Corporation MCP51 Ethernet Controller [10de:0269] (rev a3) Subsystem: Hewlett-Packard Company Presario V6133CL [103c:30b7] Kernel driver in use: forcedeth 03:00.0 Network controller [0280]: Broadcom Corporation BCM4311 802.11a/b/g [14e4:4312] (rev 02) Subsystem: Hewlett-Packard Company Broadcom 802.11a/b/g WLAN [103c:1370] Kernel driver in use: wl

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• atheros wireless ar9285 driver

  - by nikola

  I have been having problems with wireless on Ubuntu 10 and above, Mint 11 and above. The problem is in the driver for the wireless... I can see that there is no driver installed and yet it works but reduced a lot, for example: on windows 7 ultimate 100% on distance of 1 meter (currently running) Mint Cinnamon 15 on same distance 70% when it goes under the 40 % it simply disconnects and than takes a lot of time to connect again I am new to Linux and I don't know anything about programming, yet I love the interface and look of the OS but don't want to reject it for couple of problems. There is, however, a problem with brightness control on laptop, it shows the notification and slider but with no effect The question is: Can somebody explain to me where to download and how to install the ar9285 driver for atheros wireless card laptop acer emachines eme529? or can someone explain this to me only for the LINUX MINT 15 http://www.jrhenkelmann.net/index.php?option=com_content&task=view&id=34 because the synaptic's interface is different than of mint 15 I KNOW this is Ubuntu community but the problems persist in all Linux versions

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• How to reset wireless card settings

  - by Nissan911

  Yesterday i was playing around of the wireless settings, and set up a tftp server. Today, i found the wireless icon does not show up on the panel anymore.. monitor and bluetooth are still there... I did: ifconfig -a, and it shows: etho0 link encap:ethernet, and it has: HWaddress inet6 addresss. RXbytes 0 TX bytes: 0, but it does not even have a ip4 address, nor a mask. The other one is: l0 link encap: local loopback inet addr 127.0.0.1. mask 2550 0 0 Can anyone help me how to reset the settings for my wireless connection? Thanks

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• Need a few reboots to connect to wireless

  - by Debajyoti Nandi

  I am running xubuntu 12.10 on my msi wind U100 netbook. I have a problem with the wireless connection. Whether the wireless connects automatically to a known wifi hotspot (both at home and starbucks) is temperamental. Sometimes I need to reboot one or more times to get it connected. Otherwise, it tries and keep asking me to enter the password (which is saved and when it works it does, so the problem is not with the password). Every time my computer awakes up from sleep the same problem. I have to do a reboot to connect to wireless. I searched everywhere but found no solution. I would greatly appreciate if someone has any solution. I will gladly share the hardware/software or config info, if asked, but I don't know exactly what to share and where to find them. Thanks you for any help.

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• Wireless not functional

  - by Michael Berkenblit

  I am a complete newcomer to Ubuntu. Today I installed Ubuntu 12.04 onto an 3 or 4 year old laptop - an HP DV2221. Install went fine, except that I can't get the wireless card to operate. I see that there are drivers installed (Broadcom STA wireless) and it says they are activated, but the wireless light on the body of the computer is lit as orange, when it should be blue, and if I disconnect the Ethernet wire, there is no ability to get onto Firefox. I've looked at some of the similar questions on this site, as well as Googling the issue - mostly, I guess I don't understand how to navigate or do some of the fixes recommended - I'm fairly adept technologically around Windows, but know zilch about Linux and how to perform some of the fixes - so, if possible, please tell me how I get to the menus needed to rectify the situation.

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• Wireless/Bluetooth problems on t43p

  - by user75965

  I have been struggling to get my wireless mini pcmcia card recognised by 12.04. It suddenly stopped, mid session. I have taken it out and replaced with a couple of spares with slightly different serial numbers. One had no joy - 'unauathorised'. The other worked briefly for thunderbird but not firefox, it seemed. The network controller reads like this: 0b:02.0 Network controller: Intel Corporation PRO/Wireless 2200BG [Calexico2] Network Connection (rev 05) I have ordered a replacement from ebay, and hope I got the right one - used the the FRU number from the one that stopped working. But I have ALWAYS had no joy with my Thinkpad t43p Bluetooth and Ubuntu ( 12.04, and even 11.04 and 11.10, if I remember rightly). Do you think the Bluetooth problem will solve with a new mini pcmcia? Surely not, as it has never worked, whereas Wireless worked until a couple of weeks ago...

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• Wireless doesn't connect in Ubuntu 10.04 Lxde

  - by David

  Problem I have a Dell mini 9, and the wireless has worked without trouble in Ubuntu and Xubuntu versions 8.04 and 10.04. However, after installing lxde, the wireless doesnt connect. Network manager recognizes the local networks, and will say that it is connected, but ifconfig does not confirm the connection or the existance of a wlan0. I have another Ubuntu 10.04 notebook that works fine. My wireless device is Broadcom BCM4312 802.11b/g What I have tried I have tried to remove and install network-mananager and inxi but neither work, and sudo modprobe wl returns WARNING: All config files need .conf: /etc/modprobe.d/blacklist, it will be ignored in a future release.

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• If I enable/disable my wireless device, my computer will panic

  - by Yinyanghu

  Now, I use Debian 6.0.6 instead of Fedora 16/17. But I still sustain the problem of my wireless problem. If I enable/disable my laptop wireless device or my usb wifi adaptor, my laptop will panic. It seems like all the processes stop at that time and I have to restart my laptop directly. P.S. I think I installed the drivers correctly and the linux kernel may have some bugs. For example, when I unplug my usb wifi adaptor or I use this command, ifdown wlan0 I encounter this problem. Wireless Device: PCI: 03:00.0 Network controller: Broadcom Corporation BCM43225 802.11b/g/n (rev 01) USB: Bus 002 Device 005: ID 0bda:8176 Realtek Semiconductor Corp. RTL8188CUS 802.11n WLAN

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• Can't connect to wireless without typing sudo modprobe b43 in terminal

  - by user90889

  I just upgraded to 12.04 on an old ACER Travelmate 5320 using Broadcom 4311. I wasn't able to connect to the internet through the wireless for a few days. It didn't even display wireless networks. I was finally able to make it work by following the instructions found here: http://linuxwireless.org/en/users/Drivers/b43#supported However, each time I log on to the computer I have to go to the terminal and type sudo modprobe b43 to make the wireless work. Is there somehow I can avoid this? I have used Ubuntu for many years but always relied on other people to help me with the technical stuff. The terminal is alien to me so I literally follow online forum instructions without knowing what I'm doing. Also, I tried many many things before I managed to make it work. So I'm worried I may have installed something that now conflicts with whatever the sudo modprobe b43 does. Thank you

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• No wireless after resuming from suspend?

  - by lapor

  When I resume my computer from suspend it doesn't want to connect to any wireless connection. It looks like it is connecting, but after a while it asks me to retype a password for wireless connection. It connect after I restart it. I am using Toshiba Satellite A210 and Ubuntu 10.10 (I have the same problem with 10.04 and 11.04 beta2. 14:00.0 Ethernet controller: Atheros Communications Inc. AR5001 Wireless Network Adapter (rev 01) Subsystem: Askey Computer Corp. Device 7128 Flags: bus master, fast devsel, latency 0, IRQ 19 Memory at cfcf0000 (64-bit, non-prefetchable) [size=64K] Capabilities: <access denied> Kernel driver in use: ath5k Kernel modules: ath5k Should I file a bug?

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• Ubuntu 12.04 on Vm Player showing Wired Network Instead of Wireless Network

  - by Fak365

  I am new to Ubuntu, recently I installed ubuntu 12.04 in Vm Player (Virtual Machine) on my Dell laptop having windows 7 ultimate 32 bit for just to check the security of my wireless network and want to crack the WiFi (WPA-PSK) password but in ubuntu it does not show the wireless network it shows the 2 arrow sign as i have not connect the ethernet cable to my laptop and connected through WiFi on my main OS (windows 7) but it shows the wired network and internet is working but it does not show wifi connection. On windows 7 WiFi is connected and showing the WiFi connection and working correctly.But my main motive is to crack the WiFi password as it can't detect WiFi network so what to do? Please Help.!!thanks My Laptop Specification : Laptop : Dell Latitude D620 OS : Windows 7 Ultimate 32 bit Processor : Core Duo 2 T7200 @ 2Ghz Ram : 2 GB WiFi card : Intel Pro/Wireless 3945 ABG Virtual Machine : Vm Player V 5.0.1 If Need to Install Drivers Please Give Me Full Information how to install and which driver I should install. Thanks In Advance.

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• wireless not working, but wired does

  - by user211762

  First of all I'm new to Ubuntu, just bought a laptop with Ubuntu yesterday. I disable wireless networking in the upper right corner, and I don't have option to enable it back. I tried a lot of things and none is seems to work: I installed Wicd network manger, and it says no wireless network found, but i assure you there are several of them as my smart tv can detect them. when I type rfkill list, I get this: 0: dell-wifi: Wireless LAN Soft blocked: no Hard blocked: no when I type ifconfig wlan0, I get this: wlan0: error fetching interface information: Device not found

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• Manually re-enable wireless and bluetooth

  - by tacozmeister

  So, today, I decided to turn off bluetooth to save battery power. When I did so, it did everything like normal. Whatever. But whenever I want to re-enable Wifi and Bluetooth, it just has "Enable Wireless" and "Enable bluetooth" grayed out in the respective things on the top-right of the desktop. I am using 12.04 Precise Pangolin on a Dell laptop that has never had wireless problems before. Clicking the grayed-out part does nothing. Re-logging and restarting has no effect, and I'm on an account that has full administrative permission. My attempts: ~$ sudo dmesg | grep wlan0 [19.960211] ADDRCONF(NETDEV_UP): wlan0: link is not ready . ~$ sudo dmesg | grep blue [[nothing]] What do I do to manually re-enable wireless and bluetooth?

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• Is there really a need for encryption to have true wireless security? [closed]

  - by Cawas

  I welcome better key-wording here, both on tags and title. I'm trying to conceive a free, open and secure network environment that would work anywhere, from big enterprises to small home networks of just 1 machine. I think since wireless Access Points are the most, if not only, true weak point of a Local Area Network (let's not consider every other security aspect of having internet) there would be basically two points to consider here: Having an open AP for anyone to use the internet through Leaving the whole LAN also open for guests to be able to easily read (only) files on it, and even a place to drop files on Considering these two aspects, once everything is done properly... What's the most secure option between having that, or having just an encrypted password-protected wifi? Of course "both" would seem "more secure". But it shouldn't actually be anything substantial. That's the question, but I think it may need more elaborating on. If you don't think so, please feel free to skip the next (long) part. Elaborating more on the two aspects ... I've always had the feeling using any kind of the so called "wireless security" methods is actually a bad design. I'm talking mostly about encrypting and pass-phrasing (which are actually two different concepts), since I won't even consider hiding SSID and mac filtering. I understand it's a natural way of thinking. With cable networking nobody can access the network unless they have access to the physical cable, so you're "secure" in the physical way. In a way, encrypting is for wireless what building walls is for the cables. And giving pass-phrases would be adding a door with a key. But the cabling without encryption is also insecure. If someone plugin all the data is right there. So, while I can see the use for encrypting data, I don't think it's a security measure in wireless networks. It's wasting resources for too little gain. I believe we should encrypt only sensitive data regardless of wires. That's already done with HTTPS, so I don't really need to encrypt my torrents, for instance. They're torrents, they are meant to be freely shared! As for using passwords, they should be added to the users, always. Not to wifi. For securing files, truly, best solution is backup. Sure all that doesn't happen that often, but I won't consider the most situations where people just don't care. I think there are enough situations where we actually use passwords on our OS users, so let's go with that in mind. I keep promoting the Fonera concept as an instance. It opens up a free wifi port, if you choose so, and anyone can connect to the internet through that, without having any access to your LAN. It also uses a QoS which will never let your bandwidth drop from that public usage. That's security, and it's open. But it's lacking the second aspect. I'll probably be bashed for promoting the non-usage of WPA 2 with AES or whatever, but I wanted to know from more experienced (super) users out there: what do you think?

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• Router to WIFI Client to Router (New solution for distance when repeater doesnt help)

  - by Kangarooo

  Ethernet to TL-WR340G with WIFI enabled Using TL-WA500 tried repeater mode which was not good enough and had password problems (could not connect if using either ASCII or Normal password in one way then in repeater worked other way) and also could not forward (repeat) WPA/WPA2 security. So since this repeater can also be as client, I made it as client and used another router (TL-WR740N) to get from wire connection from that client and all was working for a little bit. Every machine is set up to be auto DHCP. 1st when setting up client mode I found it working after doing reset. Then after some tens of minutes internet stopped working. When I removed WiFi client then all went back to normal. Where is the problem and how to make this work? Ethernet- TL-WR340G(AutoDHCP) ==> wifi ==> TL-WA500 TL-WA500 wifi client mode(AutoDHCP) ==> wire ==> TL-WR740N TL-WR740N router mode (AutoDHCP) ==> My Computer In other words: TL-WR340G ) ) ) ) TL-WA500 ===== TL-WR740N ==== PC1 ) ) WiFi === Wire

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• Frequent and weird wifi disconnections

  - by Sidou

  How would you explain, troubleshoot (and solve) the following problem? Wifi ADSL modem router D-link 2640R installed in living room at about 1.8m height. Working fine, synchronising and getting/serving stable internet connection. First situation: -Laptop 01 in other end of the house, let's say in room01 southern to the living room, distant by about 15m. Getting stable signal of good to very good quality. No disconnection. -Laptop 02 in room02 opposite to room01 (5m West) which makes it almost at the same distance and direction from the router located 15m North. Getting stable signal of good to very good quality. No disconnection. Second situation: -Laptop 01 moved to room03 Northern to the living room (actually just 3m behind the wall where the router lies). Getting stable signal of excellent quality. No disconnection. -Laptop 02 still in room02 but now experiences frequent disconnections (actually almost impossible to get the Internet even though the signal level is still very good. Either no Internet with the wifi icon appearing connected to access point or no connection established at all which happens every 2 minutes and that means virtually no Internet at all as I can just get a timeframe of 1 minute or so to load any website or even get to the router's web based control panel. If Laptop 01 is completely shut down or its wifi adapters shut down or even still working but its wifi MAC address forbidden, then Laptop 02 has no problem at all. If Laptop 02 is moved to a nearer location to the router, in the living room for instance, then no connection problem occurs even if Laptop 01 is also connected. And also if we move back Laptop 01 to its original location (room 01), then no problem as well. I'm completely lost and don't know how to address this issue. I tried to change the Wifi channel and even tried the auto channel scan but that didn't solve it. I know that the problem is probably coming from Laptop 01 being in its new location or some sort of interference as the problem occurs only under the described condition but I have no idea how to solve it! I also scanned the neighborhood for wifi jam using InSSIDer, there are few other access points but they don't seem to affect the situation. Any ideas about the steps to follow or tools to use ?

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• How to connect to internet 2 or more pcs with an usb wifi adapter

  - by bhaoahd

  In one pc I have an USB Wifi adapter (Realtek RTL8187L Chipset), from there a 10 meters cable to an outdoor antenna. With that I connect to a public Access Point. Now I want to be able to connect more computers to internet using that same connection that comes from the outdoor antenna, what options do I have to do this? I do have another usb wifi adapter with a small omni antenna, and a router encore ENHWI-G/A. This router can be used as a Wifi AP, but it needs a modem that works with the RJ45 connector. Is there a way I could take internet from the outdoor antenna, and create another AP indoor using that router to "repeat" that wifi that comes from the outdoor antenna? If creating this second AP is not possible, should I use some sort of local network between computers, connect my main PC with the outdoor antenna, and share the connection through the lan? (I would really prefer to have a second AP indoor so I can connect other devices like a Palm, but I am not sure how could this be possible with this router and the usb wifi adapter)

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• Is it better to use a crowded 2.4GHz Wi-Fi channel 1, 6, 11 or "unused" 3, 4, 8, or 9?

  - by Luke

  I understand that 2.4GHz Wi-Fi channels overlap, and that the only non-overlapping channels in the US are 1, 6, and 11. Generally, my signal strength on channels 1, 6, and 11 are much stronger than my neighbors' on the same channel. However, several of the channels may have 4 or 5 others on that same channel. In this scenario, is it better to use 3, 4, 8, or 9? Or is it better to use the crowded channels 1, 6, and 11? As a secondary question, does it even matter that my signal strength is much higher than theirs? Related: Why use wifi channels other than 1, 6 or 11?

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• No more internet connection after update in 14.04 with Intel Dual Band Wireless AC 7260

  - by luis

  My Dell XPS 15 (haswell) was working fine until I stupidly accepted recently to apply Ubuntu updates. Since then, my wifi does not work (it shows "device not managed" when clicking wifi icon in toolbar). Even USB to Ethernet adapter does not seem to work. Bluetooth at least "sees" other bluetooth devices around... See below output from dmesg (dmesg |grep iwl) : [ 886.462459] iwlwifi 0000:06:00.0: irq 51 for MSI/MSI-X [ 886.462561] iwlwifi 0000:06:00.0: Direct firmware load failed with error -2 [ 886.462562] iwlwifi 0000:06:00.0: Falling back to user helper [ 886.463284] iwlwifi 0000:06:00.0: loaded firmware version 22.1.7.0 op_mode iwlmvm [ 886.475345] iwlwifi 0000:06:00.0: Detected Intel(R) Dual Band Wireless AC 7260, REV=0x144 [ 886.475433] iwlwifi 0000:06:00.0: L1 Enabled; Disabling L0S [ 886.475684] iwlwifi 0000:06:00.0: L1 Enabled; Disabling L0S [ 886.689214] ieee80211 phy0: Selected rate control algorithm 'iwl-mvm-rs' Below the output from modinfo iwlwifi: filename: /lib/modules/3.13.0-29- generic/kernel/drivers/net/wireless/iwlwifi/iwlwifi.ko license: GPL author: Copyright(c) 2003-2013 Intel Corporation <[email protected]> version: in-tree: description: Intel(R) Wireless WiFi driver for Linux firmware: iwlwifi-100-5.ucode firmware: iwlwifi-1000-5.ucode firmware: iwlwifi-135-6.ucode firmware: iwlwifi-105-6.ucode firmware: iwlwifi-2030-6.ucode firmware: iwlwifi-2000-6.ucode firmware: iwlwifi-5150-2.ucode firmware: iwlwifi-5000-5.ucode firmware: iwlwifi-6000g2b-6.ucode firmware: iwlwifi-6000g2a-5.ucode firmware: iwlwifi-6050-5.ucode firmware: iwlwifi-6000-4.ucode firmware: iwlwifi-3160-7.ucode firmware: iwlwifi-7260-7.ucode srcversion: 1E6912E109D5A43B310FB34 alias: pci:v00008086d0000095Asv*sd00005490bc*sc*i* (a pack of lines of kind "alias: pci:xxxxx...." that I guess are not helpful) alias: pci:v00008086d0000095Bsv*sd00005290bc*sc*i* depends: cfg80211 intree: Y vermagic: 3.13.0-29-generic SMP mod_unload modversions signer: Magrathea: Glacier signing key sig_key: 66:02:CB:36:F1:31:3B:EA:01:C4:BD:A9:65:67:CF:A7:23:C9:70:D8 sig_hashalgo: sha512 parm: swcrypto:using crypto in software (default 0 [hardware]) (int) parm: 11n_disable:disable 11n functionality, bitmap: 1: full, 2: disable agg TX, 4: disable agg RX, 8 enable agg TX (uint) parm: amsdu_size_8K:enable 8K amsdu size (default 0) (int) parm: fw_restart:restart firmware in case of error (default true) (bool) parm: antenna_coupling:specify antenna coupling in dB (defualt: 0 dB) (int) parm: wd_disable:Disable stuck queue watchdog timer 0=system default, 1=disable, 2=enable (default: 0) (int) parm: nvm_file:NVM file name (charp) parm: bt_coex_active:enable wifi/bt co-exist (default: enable) (bool) parm: led_mode:0=system default, 1=On(RF On)/Off(RF Off), 2=blinking, 3=Off (default: 0) (int) parm: power_save:enable WiFi power management (default: disable) (bool) parm: power_level:default power save level (range from 1 - 5, default: 1) (int) I downloaded the latest versions of iwlwifi firmware from git (git clone git://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git; copy iwlwifi-3160-9.ucode iwlwifi-7260-9.ucode iwlwifi-7265-9.ucode to /lib/firmware and reboot) but as you can imagine it did not help. Update #1: Downloaded from http://wireless.kernel.org/en/users/Drivers/iwlwifi?action=AttachFile&do=get&target=iwlwifi-7260-ucode-22.15.8.0.tgz and copied the file into /lib/firmware. After reloading it with modprobe, it seems to be OK: [ 14.761283] iwlwifi 0000:06:00.0: enabling device (0000 -> 0002) [ 14.761472] iwlwifi 0000:06:00.0: irq 51 for MSI/MSI-X [ 14.772478] iwlwifi 0000:06:00.0: loaded firmware version 22.15.8.0 op_mode iwlmvm [ 14.800274] iwlwifi 0000:06:00.0: Detected Intel(R) Dual Band Wireless AC 7260, REV=0x144 [ 14.800349] iwlwifi 0000:06:00.0: L1 Enabled; Disabling L0S [ 14.800657] iwlwifi 0000:06:00.0: L1 Enabled; Disabling L0S [ 15.007048] ieee80211 phy0: Selected rate control algorithm 'iwl-mvm-rs' However, clicking in wifi in the toolbar still shows "device not managed". Any clues? Many thanks! Luis

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• How do I get wireless to work on a Dell Mini 1018 with Realtek RTL 8188CE Network Adapter?

  - by Laurence Nagel

  My Dell Mini 1018 used to work fine with Ubuntu 12.04 with no problems connecting with the wireless card. Then I made the big mistake of attempting to disable WiFi by right-clicking on the wireless applet and un-checking "Enable Wireless." Since then, I cannot get wireless working again. The wireless applet reports that "wireless is disabled by hardware switch" but there is no hardware switch on this computer. Issuing a rfkill list yields the following: 0: dell-wifi: Wireless LAN Soft blocked: yes Hard block: yes 1: phy0: Wireless LAN Soft blocked: no Hard blocked: yes I'm in way over my head, and my computer is now useless. Help!!!

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• Wireless cycling between connected and disconnected

  - by Tony Kilgore

  My friend has a Acer Aspire 5733Z-4851 it keeps disconnecting and connecting to his wifi but his hard wire will run just fine. Any suggestions? All the codes: lspci: 00:00.0 Host bridge: Intel Corporation Core Processor DRAM Controller (rev 02) 00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated Graphics Controller (rev 02) 00:16.0 Communication controller: Intel Corporation 5 Series/3400 Series Chipset HECI Controller (rev 06) 00:1a.0 USB controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 05) 00:1b.0 Audio device: Intel Corporation 5 Series/3400 Series Chipset High Definition Audio (rev 05) 00:1c.0 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 1 (rev 05) 00:1c.1 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 2 (rev 05) 00:1d.0 USB controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 05) 00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev a5) 00:1f.0 ISA bridge: Intel Corporation Mobile 5 Series Chipset LPC Interface Controller (rev 05) 00:1f.2 SATA controller: Intel Corporation 5 Series/3400 Series Chipset 4 port SATA AHCI Controller (rev 05) 00:1f.3 SMBus: Intel Corporation 5 Series/3400 Series Chipset SMBus Controller (rev 05) 00:1f.6 Signal processing controller: Intel Corporation 5 Series/3400 Series Chipset Thermal Subsystem (rev 05) 01:00.0 Ethernet controller: Broadcom Corporation NetLink BCM57780 Gigabit Ethernet PCIe (rev 01) 02:00.0 Network controller: Atheros Communications Inc. AR9285 Wireless Network Adapter (PCI-Express) (rev 01) ff:00.0 Host bridge: Intel Corporation Core Processor QuickPath Architecture Generic Non-core Registers (rev 02) ff:00.1 Host bridge: Intel Corporation Core Processor QuickPath Architecture System Address Decoder (rev 02) ff:02.0 Host bridge: Intel Corporation Core Processor QPI Link 0 (rev 02) ff:02.1 Host bridge: Intel Corporation Core Processor QPI Physical 0 (rev 02) ff:02.2 Host bridge: Intel Corporation Core Processor Reserved (rev 02) ff:02.3 Host bridge: Intel Corporation Core Processor Reserved (rev 02) lsmod: Module Size Used by snd_seq_dummy 12798 0 rfcomm 46619 0 bnep 18140 2 bluetooth 209199 10 rfcomm,bnep parport_pc 32688 0 ppdev 17073 0 lp 17759 0 parport 46345 3 parport_pc,ppdev,lp binfmt_misc 17500 1 ums_realtek 17949 0 snd_hda_codec_realtek 77876 1 uas 17844 0 coretemp 13400 0 snd_hda_intel 33491 4 snd_hda_codec 134212 2 snd_hda_codec_realtek,snd_hda_intel snd_hwdep 13602 1 snd_hda_codec snd_pcm 96580 2 snd_hda_intel,snd_hda_codec snd_seq_midi 13324 0 snd_rawmidi 30512 1 snd_seq_midi uvcvideo 76749 0 videobuf2_core 32851 1 uvcvideo videodev 120309 2 uvcvideo,videobuf2_core videobuf2_vmalloc 12860 1 uvcvideo videobuf2_memops 13368 1 videobuf2_vmalloc snd_seq_midi_event 14899 1 snd_seq_midi snd_seq 61521 3 snd_seq_dummy,snd_seq_midi,snd_seq_midi_event snd_timer 29425 2 snd_pcm,snd_seq arc4 12529 2 snd_seq_device 14497 4 snd_seq_dummy,snd_seq_midi,snd_rawmidi,snd_seq psmouse 95552 0 ath9k 131308 0 tg3 148780 0 snd 78734 17 snd_hda_codec_realtek,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_seq_device microcode 22803 0 mac80211 539908 1 ath9k ath9k_common 14055 1 ath9k ath9k_hw 395218 2 ath9k,ath9k_common ath 23827 3 ath9k,ath9k_common,ath9k_hw i915 520629 3 soundcore 15047 1 snd serio_raw 13215 0 cfg80211 206566 3 ath9k,mac80211,ath snd_page_alloc 18484 2 snd_hda_intel,snd_pcm intel_ips 18049 0 lpc_ich 17061 0 drm_kms_helper 46784 1 i915 drm 275528 4 i915,drm_kms_helper mei 40690 0 i2c_algo_bit 13413 1 i915 joydev 17457 0 acer_wmi 32453 0 sparse_keymap 13890 1 acer_wmi mxm_wmi 12979 0 mac_hid 13205 0 wmi 19070 2 acer_wmi,mxm_wmi video 19335 2 i915,acer_wmi usb_storage 48838 1 ums_realtek sudo lshw -C network: *-network description: Ethernet interface product: NetLink BCM57780 Gigabit Ethernet PCIe vendor: Broadcom Corporation physical id: 0 bus info: pci@0000:01:00.0 logical name: eth0 version: 01 serial: b8:70:f4:9a:35:b6 size: 10Mbit/s capacity: 1Gbit/s width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=tg3 driverversion=3.123 duplex=half firmware=sb latency=0 link=no multicast=yes port=MII speed=10Mbit/s resources: irq:44 memory:d3400000-d340ffff[/QUOTE][QUOTE]*-network description: Wireless interface product: AR9285 Wireless Network Adapter (PCI-Express) vendor: Atheros Communications Inc. physical id: 0 bus info: pci@0000:02:00.0 logical name: wlan0 version: 01 serial: 68:a3:c4:eb:60:7d width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless configuration: broadcast=yes driver=ath9k driverversion=3.5.0-19-generic firmware=N/A ip=192.168.0.168 latency=0 link=yes multicast=yes wireless=IEEE 802.11bgn resources: irq:17 memory:d2400000-d240ffff)

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• How can a Cisco Aironet wireless card connect to a WPA encrypted network?

  - by Aibara Iduas

  I have a Thinkpad T40 running Ubuntu 10.10. I want to connect to wireless networks with WPA encryption; they appear in the network list, but are grayed out. The card does support WPA, since it works in Windows. In 10.10 the wireless works just fine with unprotected and WEP networks, but cannot connect to any WPA networks. The card is a Cisco Aironet Wireless 802.11b. I've been reading a lot of forum posts trying to find a solution, but either encounter threads where no solution was found or answers longer apply (most date from 2007, since this isn't the newest of computers). Here is the output of sudo lshw -c network: *-network:1 DISABLED description: Wireless Interface product: Cisco Aironet Wireless 802.11b vendor: AIRONET Wireless Communications physical id: 2 bus info: pci@000:02:02.0 logical name: eth1 version: 00 serial: 00:02:8a:78:6a:44 width: 32 bits clock: 33MHz capabilities: pm vpd bus_master cap_list rom ethernet physical wireless logical configuration: broadcast=yes driver=airo latency=64 maxlatency=4 mingnt=4 multicast=yes wireless=IEEE 802.11-DS Thanks, any help would be greatly appreciated!

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• Why can't we just use a hash of passphrase as the encryption key (and IV) with symmetric encryption algorithms?

  - by TX_

  Inspired by my previous question, now I have a very interesting idea: Do you really ever need to use Rfc2898DeriveBytes or similar classes to "securely derive" the encryption key and initialization vector from the passphrase string, or will just a simple hash of that string work equally well as a key/IV, when encrypting the data with symmetric algorithm (e.g. AES, DES, etc.)? I see tons of AES encryption code snippets, where Rfc2898DeriveBytes class is used to derive the encryption key and initialization vector (IV) from the password string. It is assumed that one should use a random salt and a shitload of iterations to derive secure enough key/IV for the encryption. While deriving bytes from password string using this method is quite useful in some scenarios, I think that's not applicable when encrypting data with symmetric algorithms! Here is why: using salt makes sense when there is a possibility to build precalculated rainbow tables, and when attacker gets his hands on hash he looks up the original password as a result. But... with symmetric data encryption, I think this is not required, as the hash of password string, or the encryption key, is never stored anywhere. So, if we just get the SHA1 hash of password, and use it as the encryption key/IV, isn't that going to be equally secure? What is the purpose of using Rfc2898DeriveBytes class to generate key/IV from password string (which is a very very performance-intensive operation), when we could just use a SHA1 (or any other) hash of that password? Hash would result in random bit distribution in a key (as opposed to using string bytes directly). And attacker would have to brute-force the whole range of key (e.g. if key length is 256bit he would have to try 2^256 combinations) anyway. So either I'm wrong in a dangerous way, or all those samples of AES encryption (including many upvoted answers here at SO), etc. that use Rfc2898DeriveBytes method to generate encryption key and IV are just wrong.

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