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• Securing data sent to an unencrypted WiFi AP

  - by David Parunakian

  The business plan of a project I'm involved in assumes selling certain WiFi-enabled devices to end users. All these devices originally have an unencrypted connection and a standard SSID. The problem is that although the user can connect to it and set both a new SSID and a WPA passphrase, these are being sent to the AP in plain text and thus can be intercepted by anyone nearby with a sniffer. What's the best solution to this problem, and why? Initially set up an encrypted wireless network at the device and supply the user with a printed passphrase Buy an SSL certificate for the AP's default IP address or local domain name (the APs aren't supposed to work as a router and have a captive portal & dnsmasq installed, so all of them can pretend to be myunit.example.com, as far as I understand) Something different Thank you.

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• Second partition with Windows 7 unmountable

  - by Florian Pilz

  I'm using GRUB2 to dualboot Ubuntu and Windows 7. I installed Windows 7 some days ago and rewrote GRUB2 to cope with the dualboot. Everything went fine till yesterday - I could boot into both OS. Since this morning my laptop restarts every time I choose Windows 7 from the menu. Ubuntu is still working. As I tried to mount the partition with Windows 7 on Ubuntu it gave me return code 2, so this isn't working as well. I tried to reinstall GRUB2 to the MBR but it didn't help. I also tried to repair Windows 7 boot with it's install DVD, while trying so it showed me the following error: "Status: 0xc000000f Info: Boot selection failed because a required device is inaccessible." Tanks in advance

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• How do I restore a non-system hard drive using Time Machine under OSX?

  - by richardtallent

  I dropped one of the external drives on my Mac Pro and it started making noises... so I bought a replacement drive. No biggie, that's why I have Time Machine, right? So now that I have the new drive up and initialized, how do I actually restore the drive from backup? Time Machine is intuitive when it comes to restoring the system drive or restoring individual folders/files on the same literal device, but I'm a bit stuck in how to properly restore an entire drive that is not the boot drive. I saw one suggestion to use the same volume name as the old drive and then go into Time Machine. Haven't tried that since the information is unconfirmed. For now, I just went to the Time Machine volume, found the latest backup folder for that volume, and I'm copying the files via Finder. Of couse, I expect this to work just fine, but I feel like I'm missing something if that's the "proper" way to do this.

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• How do I recover from a Linux CentOS 4.6 Operating System Crash

  - by Greg Omebije

  Our x86 Linux server running CentOS4.6 has crashed. The machine boots only to the Grub prompt. We have tried using the "rescue mode" to recover the System, but it hasn't worked. How can we fix this problem, so that the machine boots normally? How can we fix this problem to the point were we can recover our files from the server Our Linux Server Configuration: Dell PowerEdge 1950 Intel Xeon 2 HDD (146GB each) 4GB RAM Hardware and Software raid setup CentOS 4.6 We used Sysrecord to boot the computer: the following are the output of fdisk -l Disk /dev/sda: 293.3 GB, 292326211584 255 heads, 63 sectors/track, 35539 Cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0x00000080 Device Boot Start End Blocks Id System /dev/sda1 * 1 13 104391 83 Linux /dev/sda2 14 17769 142625070 8e Linux LVM

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• Enable automatic driver install in Windows XP

  - by Peter

  When Windows detects new hardware (be it graphic card or USB Peripheral) it automatically installs driver and if it can't find a driver it shows "Found New hardware wizard" that allows you to manually select a driver. My problem is that this "Found New hardware wizard" shows up every time when I plug a new device and I have to click Next Next Next.. until it finishes installation. It's just like in Windows 98 ;) I want to fix it to the way it's supposed to be. It's got nothing to do with "Windows Update" and "Driver Signing" settings in "System properties - Hardware" tab, those are on default settings. Here is the same problem I have, but those replies ale completely useless

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• Should I remove all unmanged switches from my network?

  - by IMAbev

  I have a office network with approx 150 devices (computers/printers/ip phones). Almost all of the end point devices have straight run Cat5e from my Hp switches directly to the device. IP phones for each end user sit between the hp switch and computer. (hp switch - in to phone out of phone in to computer) While I have gotten rid of most of them, I still have a couple linksys unmanaged switches that split off to 2 or more devices. I have heard various reasons for removing these switches but not entirely sure if it actually degrades the network. I agree that eliminating these switches certainly cleans up the network from a management standpoint. Are these unmanaged switches bad for my network? Is there a clear advantage to having 'home run' cable runs to each of my end point devices?

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• Forcing logon to Air Watch server upon joining wifi

  - by DKNUCKLES

  I'm setting up a wireless controller that I would like to leave as unsecured. When a user connects to this network they need to be forwarded to a specific page where they can authenticate with the Air Watch system they have in place. Once authentication takes place, a profile will be downloaded to their device and we can administer the devices accordingly. I'm mulling over how I can force the page to the user when they log in. The methodology I'm thinking about working with is creating a NAT rule for that VSC that would forward all port 80 and 443 traffic to the airwatch server. Once they authenticate, a profile will be downloaded which will connect the devices to an Virtual Access Point who's SSID isn't broadcasted. Is this methodology correct or can someone think of an easier / more efficient way of accomplishing this? The controller is an HP MSM720 for what it's worth.

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• No sound on Debian unstable Intel Corporation 82801JD/DO (ICH10 Family) HD Audio Controller

  - by Dave Roger

  I have no sound on my Debian unstable. # cat /etc/issue Debian GNU/Linux squeeze/sid # lspci |grep -i audio 00:1b.0 Audio device: Intel Corporation 82801JD/DO (ICH10 Family) HD Audio Controller (rev 02) # lsmod | grep -i snd snd_hda_codec_realtek 235506 1 snd_hda_intel 19907 0 snd_hda_codec 54244 2 snd_hda_codec_realtek,snd_hda_intel snd_hwdep 5380 1 snd_hda_codec snd_pcm_oss 32591 0 snd_mixer_oss 12606 1 snd_pcm_oss snd_pcm 60471 3 snd_hda_intel,snd_hda_codec,snd_pcm_oss snd_seq_midi 4400 0 snd_rawmidi 15515 1 snd_seq_midi snd_seq_midi_event 4628 1 snd_seq_midi snd_seq 42881 2 snd_seq_midi,snd_seq_midi_event snd_timer 15582 2 snd_pcm,snd_seq snd_seq_device 4493 3 snd_seq_midi,snd_rawmidi,snd_seq snd 46446 11 snd_hda_codec_realtek,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_seq_device soundcore 4598 1 snd snd_page_alloc 6249 2 snd_hda_intel,snd_pcm # cat /proc/asound/version Advanced Linux Sound Architecture Driver Version 1.0.21. # uname -r 2.6.32-5-amd64

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• CentOS - massive usage on loopback interface

  - by Matthew Iselin

  Hi, I have a CentOS installation which is running fairly smoothly. Today I ran ifconfig mainly to see what sort of usage has been coming across the ethernet interface, and to also check my link speed. This is what I ended up seeing for the loopback device: lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:10301085132061223274 errors:0 dropped:0 overruns:0 frame:0 TX packets:13981054163812689233 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:11783901785008000095 (0.6 EiB) TX bytes:10333501021200548281 (0.9 EiB) This just feels completely wrong - almost an EiB of data? Any assistance in tracking down the source of these statistics would be greatly appreciated.

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• multi boot: xp + xp + xubuntu, how to?

  - by Jassano

  My laptop (with a single harddrive) currently has xp + xubuntu dual boot. I want to make that triple boot: xp + xp + xubuntu Please don't ask why, take it as given. How can I accomplish this triple boot? I tried using gparted to add a partition (worked!), used dd to clone the xp install to the new partition (worked!), edited grub (my bootloader) to list a third entry pointing to the correct device (worked!). But regardless of which of the two xp entries in grub I select I still get booted into one and the same XP. The files for the other XP show up under D: so I know they're there alright. I have edited the boot.ini on the new partition so everything looks to be in order. What do I need to do to change that and make both xp instances bootable in this scenario?

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• NetBSD as VMware workstation guest: `startx` hangs and maxes all CPUs utilization

  - by Howard Guo

  I am using VMware workstation 8. I have attempted to install and run NetBSD 5.1.2 and 6.0. Installations all went OK and the system was usable until I install a window manager. After installed xfce4, in NetBSD 5.1.2, I could startx and used xfce4 two times, however consecutive startx will hang and max all CPU to 100%. In NetBSD 6.0 RC2, I could not even start xfce4 once, startx hangs and max all CPU to 100%. I have tried to use both vmwlegacy and vmware device drivers, they don't help. I have also tried both 32bit and 64bit NetBSD, they behave in the same way. I also tried to catch the output of startx, however system was already hanging before the output gets flushed. Apparently no one else has encountered these troubles on Google search, did I miss any configuration piece? Any other suggestions please?

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• What ssh command would I use to set up "backwards listening"

  - by Nathan

  Machine A is behind a firewall. I have physical access to it, but I want to log into it remotely, and I do not have access to the firewall settings. Machine B is remote, and not behind any firewall. (It's my linode) Machine C is the mobile device I'm going to attempt to ssh into A from. Is there an ssh command that I can run from machine A that connects to machine B and stays open, that will allow me to log into A from C, via B? From the manual I'd guess it would be to run the follwing on A ssh -R *:9999:localhost:22 me@B and then run this on C ssh me@B -p 9999 but the previous command reports "Connection refused."

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• Problem Assigning Static IP to CentOS Server

  - by nategood

  We have a sandbox server running CentOS that we run inside our office. Our ISP has assigned us a block of 5 static IPs. We now want to assign it a static IP. DEVICE=eth0 BOOTPROTO=none # have also tried "static" here HWADDR=00:13:72:*:*:* ONBOOT=yes TYPE=Ethernet NETMASK=255.255.255.0 IPADDR=173.*.*.161 GATEWAY=10.1.10.1 /etc/resolv.cnf is also set with the appropriate name servers from our ISP. When I ifdown eth0 then ifup eth0 I get... SIOCADDRT: Network is unreachable When I switch to DCHP, the machine has an IP assigned and there are no connection problems. Any ideas?

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• Cisco Secure ACS 4.2 + TACACS+ - installed together or?

  - by Lance

  I'm tasked with installing Cisco Secure ACS (4.2 as its windows based). Do you install TACACS.net or something similar with ACS or does ACS facilitate the TACACS+ authentication? I can get my device to authenticate against a tacacs.net installation without much trouble but can't seem to figure out how one plugs ACS in, per se. I've installed ACS on the same server (is this my problem?) but no matter what I do I can only get my TACACS+ users to authenticate. Any helps/tips would be greatly appreciated!

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• Boot from VHD with windows7 - bcdedit trouble

  - by Michiel Overeem

  I'm running Windows7 Enterprise, x64 version. I've created a windows7 vhd file with help of the following blog post hanselman blog After that, I've added it to my boot menu with help of another blog post hanselman blog This worked great. After that, i've upgraded my hdd. With help of clonezilla i've copied the old disk to the new disk. Next step was to copy the vhd to another partition. Then i updated the boot menu. However, the step C:\>bcdedit /set {guid} device vhd=[driveletter:]\<directory>\<vhd filename> fails with the message An error has occurred setting the element data. The request is not supported. what is happening?

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• Can't connect to wireless router anymore due to data rate problem

  - by Jay White

  I was playing around with my wireless router, and switched the mode to a fixed mode B. Now< I can no longer assoicate to the AP. Windows does not give any particular error message, but with wireshark I see that the returned error is that the client does not support the necessary data rate. My wireless card is type n, and it is set to mode a/b/g compatible. I tried setting ot to just b, however this made no difference. How can I set the data rate of my card so that I can connect again to my AP? I would prefer not to just reset the device, as there has been some configuration done that would be a pain to redo, and as well I do not have the ISP password handy. Regardless I would like to understand this situation better.

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• Mac OS X - rmdir fails with "Operation not permitted" for a folder created by a PC on a removable dr

  - by maxint

  Hello. I have a problem (using Mac OS X 10.5.8) with the access rights of a folder that was presumably created by a virus on a disk-on-key drive when I used it with a PC. I can't remove the folder or change it's name. In Finder's Info window the Lock box is unchecked and uncheckable - if I try to check it it flips back to off. Please see the details: MaxBookAir:GARMIN'S maxint$ rmdir winamp_cache_0001/ rmdir: winamp_cache_0001/: Operation not permitted MaxBookAir:GARMIN'S maxint$ MaxBookAir:GARMIN'S maxint$ mv winamp_cache_0001 test mv: rename winamp_cache_0001 to test: Operation not permitted MaxBookAir:GARMIN'S maxint$ MaxBookAir:GARMIN'S maxint$ GetFileInfo winamp_cache_0001 directory: "/Volumes/GARMIN'S/winamp_cache_0001" attributes: avbstclinmedz created: 12/23/2009 14:34:52 modified: 02/13/2010 22:52:36 MaxBookAir:GARMIN'S maxint$ MaxBookAir:GARMIN'S maxint$ stat -x winamp_cache_0001 File: "winamp_cache_0001" Size: 32768 FileType: Directory Mode: (0777/drwxrwxrwx) Uid: ( 502/ maxint) Gid: ( 20/ staff) Device: 14,5 Inode: 7439 Links: 1 Access: Wed Dec 23 00:00:00 2009 Modify: Sat Feb 13 22:52:36 2010 Change: Sat Feb 13 22:52:36 2010 MaxBookAir:GARMIN'S maxint$ MaxBookAir:GARMIN'S maxint$ stat -r winamp_cache_0001 234881029 7439 040777 1 502 20 0 32768 1261506600 1266081756 1266081756 1261559092 131072 64 32768 winamp_cache_0001 MaxBookAir:GARMIN'S maxint$ MaxBookAir:GARMIN'S maxint$ ls -lTd winamp_cache_0001/ drwxrwxrwx 1 maxint staff 32768 Feb 13 22:52:36 2010 winamp_cache_0001/ MaxBookAir:GARMIN'S maxint$

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• NAS + XBMC combination

  - by Hendrik

  I currently own a WD Sharespace and I am not too happy about it. It will freeze constantly and its rather slow. I've been thinking of replacing it. I also own a WD HD Live, and it works like it is supposed to, but recently I've seen XBMC in action and I was quite impressed. I've been wondering lately about the possibility of replacing both products with one new device: a fast reliable nas which I can install XBMC on and is capable of rendering video and has an HDMI out. Do any such devices exist for sale or is the only way to build one from scratch? I've seen HTPC's for sale but I've never seen any of them with a raid setup. I've also read about building your own NAS with freeNAS but those setups dont allow you to run XBMC. Does anyone have experience with this?

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• USB hard drive doesn't graceful power off after eject on Windows 7

  - by Sim

  I have a couple of Seagate FreeAgent Go external USB hard drives and would like them to gracefully power off after ejecting in Windows 7. With Windows XP a few seconds after they are ejected they gracefully power off. When ejecting them on Windows 7 they just stay on and have to be physically disconnected before they lose power. I have checked the hard drive removal policy and it is set to quick removal. I have also looked in the Seagate forums but I couldn't find any info on this so I thought I'd ask the SuperUser community on any ideas why the difference and how to get the same behaviour in Windows 7 as in XP? Update: I am finding that this also happens with USB thumb drives as well. My current theory is that there were changes to the driver model with Vista/Win 7 that haven't been reflected in the device drivers yet. So things that worked under XP don't under Win7 as the drivers haven't been updated for the new model. Does that sound right?

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• RDMA architecture - do you need adapters on both ends?

  - by Bobb

  I know Linux can use RDMA NICs like Solarflare... I just found Intel has something like that NetEffect cards. But Intel is talking all about clusters.. Can someone please explain. If I want low-latency networking and install RDMA NIC on my server. Is there limitation on where the cable can go? Is there a specific device expected on the other end? Is it special RDMA switch or RDMA adapter before switch or what? Why is this cluster talk? What if I want a single server with Windows (I can install HPC Windows or Windows 2008 R2)?

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• SElinux stopping LVS from working with https

  - by J Hoskins

  LVS/piranha is setup and trying to get it to balance https instead of http. Setup https testing with wget - idea from this link. Works when I do it at the command prompt. With SELinux enforcing, the wget fails to run due to the lack of access to /dev/random. (Error - Could not seed PRNG; consider using --random-file. Disabling SSL due to encountered errors.) wget runs as system_u:system_r:piranha_lvs_t:s0 but the file/device /dev/random has system_u:object_r:random_device_t:s0 Also, wget is trying to getattr and read. How do you allow wget to use /dev/random so it will do ssl?

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• Proxy Appliance

  - by Kumar

  I'm looking for a way to set-up a web proxy at home. Hopefully there's a solution I can use to do this. Alternatively, do you have any ideas for setting up one at home using a proxy with an auto updating list? UPDATE - AutoUpdating list so the new sites are categorized and downloaded and the filtering is done by category instead of per site e.g. peerblock works this way Appliance as in a small dedicated hardware or device to perform this task, like WD TV live or Acer Aspire Revo with the media center edition I'd be ok with setting up Squid / Linux / SquidGuard even if i'm not familiar with *nix but ideally a small form factor pc with dual nic's would be ideal so it can be out of sight for the most part !

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• Cannot resize OS X partition

  - by joshhunt

  I am trying to resize my existing Mac OS Extended partition on my Macbook to install Windows 7 (using steps similar to these), but when ever I go to apply the changes, I get this error: Partition failed Partition failed with the error: The partition cannot be resized. Try reducing the amount of change in the size of the partition. The total capacity of the hard drive in question is 260GB, with the entirety being taken up by the OS X boot partition. There is I am aiming to shrink that partition down to 60GB. How can I fix this problem? I have been reducing the amount of change by 10GB each attempt, but it still is not working. I assume the problem is that there is not a large amount of continuous space on the device. Is there some way to can do a manual defrag that would rectify this problem?

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• Turning a log file into a sort of circular buffer

  - by pachanga

  Folks, is there a *nix solution which would make the log file act as a circular buffer? For example, I'd like log files to store maximum 1Gb of data and discard the older entries once the limit is reached. Is it possible at all? I believe in order to achieve that a log file should be turned into some sort of special device... P.S. I'm aware of misc logrotating tools but this is not what I need. Logrotating requires lots of IO, happens usually once a day while I need a "runtime" solution.

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• spoolsv.exe consumes all CPU and RAM resources

  - by pcampbell

  Consider a Windows 7 x64 installation with 2 printers installed. The system has 8GB installed RAM. One printer is a Brother laser MFC-8220 Printer via TCP/IP, and the other is a CutePDF printer. Problem: the spoolsv.exe regularly eats obscene amount of memory and CPU when the machine is idle. Usually the device is powered off. Turning it on has no effect on the RAM or CPU usage. The first consideration was that perhaps a print job has previously been sent to the Brother, but the queues are empty, and no jobs are waiting. These screenshots do not show, but regularly the spoolsv service will consume all 8GB and climb to use 95-100% of the CPU. The two printers - a Brother and the CutePDF printer both have 0 documents in their respective queues. Question: what measures can I take to ensure the spoolsv.exe doesn't consume inappropriate amounts of CPU and RAM?

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