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  • Improving abysmal 802.11n wireless network

    - by concept
    I am in desperate need of help to improve the abysmal performance of my 802.11n wireless network. At best I get 30Mbs (this is an internet download) from a technology that boasts 300Mbs, even worse is the LAN where to date best i have ever gotten is 1Mbs. It is literally quicker to copy the file to a USB and walk it to the other computer. Infrastructure is this AP 802.11n only broadcasting at both 2.4GHz and 5GHz Mac with 802.11a/b/g/n card is connected to the AP via 5GHz Linux with 802.11a/b/g/n card is connected to AP via 2.4GHz I have conducted the following tests (results at end of post) Internet based speed test wired and wireless LAN file copy wired and wireless I have read: http://nutsaboutnets.com/troubleshooting-wi-fi-problems/ http://www.smallnetbuilder.com/wireless/wireless-basics/30664-5-ways-to-fix-slow-80211n-- speed http colon //www.wi-fiplanet dot com/tutorials/7-tips-to-increase-wi-fi-performance.html Slow file transfer on network between two 802.11n laptops (connected directly together via access point) Wireless Network Performance Issues Slower than expected 802.11n wireless network speeds I have made the following optimizations AP broadcasts only 802.11n on both 2.4GHz and 5GHz frequencies 2.4GHz is on a channel with least interference (live in an apartment with lots of APs), this did make a 10Mb/sec improvement Our AP is the only one transmitting on the 5GHz freq. Security: WPA Personal WPA2 AES encryption Bandwidth: 20MHz / 40MHz (i assume this to be channel bonding) I have tried the following with 0 improvement Dropped the Fragment Threshold to 512 Dropped the Request To Send (RTS) Threshold to 512 and 1 Even thought of buying a frequency spectrum analyzer, until i saw the cost of them!!! Speed test results Linux Wired: DOWNLOAD 128.40Mb/s UPLOAD 10.62Mb/s www dot speedtest dot net/my-result/2948381853 Mac Wired: DOWNLOAD 118.02Mb/s UPLOAD 10.56Mb/s www dot speedtest dot net/my-result/2948384406 Linux Wireless: DOWNLOAD 23.99Mb/s UPLOAD 10.31Mb/s www.speedtest dot net/my-result/2948394990 Mac Wireless: DOWNLOAD 22.55Mb/s UPLOAD 10.36Mb/s www.speedtest dot net/my-result/2948396489 LAN NFS 53,345,087 bytes (51Mb) file Linux Mac NFS Wired: 65.6959 Mb/sec Linux Mac NFS Wireless: .9443 Mb/sec All help is appreciated, even testing methods will be accepted.

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  • MS Word 2007 Mail Merge fails on ZIP codes with leading Zeros (eg. 01234)

    - by Pretzel
    I have an Excel Spreadsheet with a ZIP code column. For some dumb reason the original spreadsheet I got had all the zip codes stored as numbers, so a ZIP code like 01234 was stored as 1234. Easy to fix with "Format Column" as "Special = ZIP Code". All values like 1234, show up as 01234. Great! When I import it into Word via Mail Merge (to print address labels), the ZIP codes on all the addresses starting with a leading zero (like 01234) revert to their old form (1234). How do I fix this?

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  • how do I match movement of an object from 2d video into a 3d package ?

    - by George Profenza
    I'm trying to add objects in a 3d package(Blender) using recorded footage. I've played with Icarus and it's great to capture the camera movement. Also the Blender 2.41 importer script works in Blender 2.49 as well. The problem is I can't seem to get 3d coordinates for objects. I have tried Autodesk(RealVIZ) MatchMover 2011 and gone through the tutorials. Tutorial 3 shows how to link a vertex from a 3d mesh to a 2d trackpoint, but the setup is for camera movement. Tutorial 4 goes into Motion capture, but it uses 2 videos of the same motion taken with 2 cameras from different viewpoints. I've tried to bypass that using the same footage twice, but that failed, as the 3d coordinate system ends up messed up. What software do you recommend for this (mapping 3d coordinates to 2d tracked points and importing them into a 3d package) ? What is the recommended technique ? Any good examples out there ? Thanks, George

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  • Any chance to extract Windows from recovery DVDs

    - by Pekka
    I have an Acer Tablet PC that came with WIndows XP Tablet PC Edition in the form of three recovery DVDs. Sadly, a mainboard fault put the machine out of business. I have now bought a used one from a different manufacturer that comes without an operating system. The recovery DVDs seem to contain three parts of a Norton Ghost image, and nothing else. The recovery DVD won't even start on a Non-Acer system. I'm a bit miffed because I legally own a Windows XP Tablet PC Edition license that I now can't use on the original machine any more. As far as I know, it's not legal in my jurisdiction for them to bind the license to a certain machine. I want to continue using the operating system on the new machine. Is there any chance of extracting usable Windows XP installation files from that image? How are such image files usually made up? Is there any free software around that can read Norton Ghost images so I can take a peek myself?

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  • Purging old Exchange email/content on SBS2003

    - by Aitch
    We have a Windows SBS 2003 server that used to manage email, calendaring and such like for a small organisation via Exchange. We successfully migrated everything to Google Apps for Business about 18 months ago. The server only provides local network services now. We have backed up and virtualized this machine and would now like to purge any residual mail to save disk space and speed up backup etc. The disk space is such that I believe the Exchange mail is still on there somewhere. I've stumbled through System Manager and poked about but cannot confirm whether this is the case. Where would this live and how might I go about it? (Disclaimer: I'm not a Windows admin, Linux is my thing...)

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  • Arguments passed on by shell to command in Unix

    - by Ryan Brown
    I've been going over this question and I can't for the life of me figure out why the answer is what it is. How many arguments are passed to the command by the shell on this command line:<pig pig -x " " -z -r" " >pig pig pig a. 8 b. 6 c. 5 d. 7 e. 9 The first symbol is supposed to be the symbol for redirected input but the site isn't letting me use it. [Fixed.] I looked at this question and said ok...arguments...not options so 2nd pig, then " ", then -r" ", 4th pig and 5th pig...-z and -x are options, so I count 5. The answer is b. 6. Where is the 6th argument that's being passed on?

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  • Excel: Edit the XML inside an XLSX file

    - by Andomar
    An Excel XLSX file is a zip archive containing several XML files. I tried to extract all the XML files, and edit xl\connections.xml using an XML editor. That's because I have to change 20+ connections to point to a different server. When I open the edited archive in Excel, it refuses the changes and repairs the file. Is there a way to edit the XML files inside an XML archive?

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  • Pinging an external server through OpenVPN tunnel doesn’t work

    - by qdii
    I have an OpenVPN server and a client, and I want to use this tunnel to access not only 10.0.8.0/24 but the whole internet. So far, pinging the server from the client through the tun0 interface works, and vice versa. However, pinging www.google.com from the client through tun0 doesn’t work (all packets are lost). I figured that I should configure the server so that any packet coming from tun0 in destination of the internet be forwarded, so I came up with this iptables config line: interface_connecting_to_the_internet='eth0' interface_openvpn='tun0' internet_ip_address=`ifconfig "$interface_connecting_to_the_internet" | sed -n s'/.*inet \([0-9.]*\).*/\1/p'` iptables -t nat -A POSTROUTING -o "${interface_connecting_to_the_internet}" -j SNAT --to-source "${internet_ip_address}" echo '1' > /proc/sys/net/ipv4/ip_forward Yet, this doesn’t work, the packets are still lost and I am wondering what could possibly be wrong with my setup. Some details: ip route gives on the server: default via 176.31.127.254 dev eth0 metric 3 10.8.0.0/24 via 10.8.0.2 dev tun0 10.8.0.2 dev tun0 proto kernel scope link src 10.8.0.1 127.0.0.0/8 via 127.0.0.1 dev lo 176.31.127.0/24 dev eth0 proto kernel scope link src 176.31.127.109 ip route gives on the client: default via 192.168.1.1 dev wlan0 proto static 10.8.0.1 via 10.8.0.5 dev tun0 10.8.0.5 dev tun0 proto kernel scope link src 10.8.0.6 127.0.0.0/8 via 127.0.0.1 dev lo scope link 192.168.1.0/24 dev wlan0 proto kernel scope link src 192.168.1.109 client uses wifi adapter wlan0 and TUN adapter tun0. server uses ethernet adapter eth0 and TUN adapter tun0. the VPN spans on 10.0.8.0/24 both client and linux are using Linux 3.6.1.

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  • Connecting a network drive only when the VPN is connected?

    - by leeand00
    I have a thumb drive that I want to be able to connect to the same place over the network at one location as it is locally. Sometimes I leave it at the other location, but usually if I'm going to back it up, I back it up locally for network traffic. Is there a way to automatically connect the thumb drive when I connect to the VPN? (Always to the same drive letter...and obviously skip connecting it if it's already plugged in locally and the VPN is connected...) I'm using a Cisco VPN Client 5.x

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  • Tool to fix video that's out of sync with audio?

    - by Javier Badia
    I'm looking for (preferably free) software for Windows 7 that will allow me to fix an AVI file that has audio out of sync with the video. I tried with Windows Live Movie Maker and VirtualDub and couldn't find out how to do it (if at all possible) on both of them. If any of those can help me, instructions for that would also be nice. Background: I have a RCA-to-USB capture card, which I'm using to transfer VHS casettes and stuff from a video camera to digital format. The problem is that the audio comes out heavily distorted. So instead I connected the audio out from the VCR directly to the computer's line in. This works, but the audio is out of sync, about half a second behind the video. I could spend time trying to fix this issuee, but I think it'll be easier to simply fix the video.

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  • OSX: Howto start VirtualBox VM on startup?

    - by snies
    The Question How do i start this Wiki VM at the startup of the OSX Server? I am running OSX Server 10.6.8 and VirtualBox 4.1.8 r75467 and a Debian Linux VM (called "wiki"). . What I tried so far Following this article: http://mikkel.hoegh.org/blog/2010/12/23/run-virtualbox-boot-mac-os-x/, i have wrote this plist and placed it in /Library/LaunchDaemons/bar.foo.WikiVirtualBox.plist: <plist version="1.0"> <dict> <key>Label</key> <string>bar.foo.WikiVirtualBox</string> <key>ProgramArguments</key> <array> <string>/usr/bin/VBoxHeadless</string> <string>-s</string> <string>wiki</string> </array> <key>RunAtLoad</key> <true></true> <key>UserName</key> <string>root</string> <key>WorkingDirectory</key> <string>/var/root</string> <key>StandardErrorPath</key> <string>/var/log/bar.foo.WikiVirtualBox.stderr.log</string> <key>StandardOutPath</key> <string>/var/log/bar.foo.WikiVirtualBox.stdout.log</string> </dict> </plist> and told launchd to start it: sudo launchctl load -w /Library/LaunchDaemons/bar.foo.WikiVirtualBox.plist . The Logfile But the VM doesn't start. A Look at tail -f /var/log/system.log shows: sudo[1909]: administrator : TTY=ttys000 ; PWD=/Users/administrator ; USER=root ; COMMAND=/bin/launchctl load -w /Library/LaunchDaemons/bar.foo.WikiVirtualBox.plist VBoxSVC[1914]: 3891612: (connectAndCheck) Untrusted apps are not allowed to connect to or launch Window Server before login. VBoxSVC[1914]: kCGErrorFailure: Set a breakpoint @ CGErrorBreakpoint() to catch errors as they are logged. com.apple.launchd[1] (bar.foo.WikiVirtualBox[1910]): Exited with exit code: 1 When i log into the server via ssh (so no login window opened) i can run: /usr/bin/VBoxHeadless -s wiki and it works. So i don't understand the error above.

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  • Networking switch setup

    - by Crash893
    I have two 48 port gigabit netgear switches with 2 SFP ports each (i also have two Mini-GBIC copper transceiver modules) Is it best to set the ports up by using the built in ports (ie plug port 1 of switchB into port 48 of switchA and port1 of switchA into the router) or is there an advantage to using the mini-gbic? (lets call the sfp ports 49 and 50) router - port 49 on switchA, port 50 switchA - port 49 SwitchB

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  • Excel Add-In not loading properly with 64-bit Excel 2013

    - by David Hyde
    I have an Excel Add-In saved to an .xla file in %appdata%\Microsoft\Addins. In the subject version of Excel it is checked on the Add-Ins list. One thing this addin does is create a drop-down menu in ThisWorkbook's Workbook_Open sub. But the menu is not created and there is no Add-Ins tab on the ribbon. No error messages. This works fine in Excel 2010 and 2007 (at least), and worked fine on the 32-bit Excel 2013 that came preinstalled on this system before I nuked it. The really maddening thing is that if I get rid of this addin and open that same .xla file, either by double-clicking or using the Open command in Excel, the menu appears as expected. I get the same behavior if I instead open the source .xls file - it all works. I've also tried saving to a .xlam file instead of .xla, but get the same bad result. Any ideas?

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  • Problems installing Adobe Premiere Elements 8 Content features

    - by Walt Maken
    I recently purchased Adobe Photoshop & Premiere Elements 8. Photoshop Elements 8 installed fine, along with the additional material available via internet download. Premiere Elements 8 installed ok from the DVD. During the Premiere Elements 8 startup process the following message appears: A reduced set of content (Instant Movie Themes, Title and Menu Templates,etc) has been installed. To install the full content set, please insert your Content DVD and run Setup.exe. If you do not have a Content DVD please visit http://www.adobe.com/go/pre_additional_downloads to download the content installer. Since I didn't have the Content DVD, I did the download, which took nearly 12 hours. The extract appeared to complete at 100%, but then immediately gave the error message "A problem occurred while extracting some files. Check available space on your computer and the write privileges on the destination folder." Why would it show this error message if it had completed the extract process 100%? What step(s) do I take now to have Content installed? Do I need to go thru the 12 hour download again or, hopefully, is there something I can do that will make it unnecessary to download again?

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  • OSX Finder - Creating New Folder with Right-Click in List View

    - by JT.WK
    I am aware that when using finder in List view, I can create a new folder by right-clicking on an empty row, and pressing 'New Folder'. However, when I happen to be browsing a folder with quite a lot of files (or just enough to invoke a scrollbar), there are no blank rows, and hence nowhere that I can right-click to create a new folder. This is not a big problem, I am just a whinger who likes consistency and find this frustrating. Yes, I am aware that I can press 'Shift + Cmd + N', or can simply change the Finder view. BUT, is there a way to do this within list view? Am I missing something obvious?

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  • Configure Windows firewall to prevent an application from listening on a specific port

    - by U-D13
    The issue: there are many applications struggling to listen on port 80 (Skype, Teamviewer et al.), and to many of them that even is not essential (in the sense that you can have a httpd running and blocking the http port, and the other application won't even squeak about being unable to open the port). What makes things worse, some of the apps are... Well, I suppose, that it's okay that the mentally impaired are being integrated in the society by giving them a job to do, but... Programming requires some intellectual effort, in my humble opinion... What I mean is that there is no way to configure the app not to use specific ports (that's what you get for using proprietary software) - you can either add it to windows firewall exceptions (and succumb to undesired port opening behavior) or not (and risk losing most - if not all - of the functionality). Technically, it is not impossible for the firewall to deny an application opening an incoming port even if the application is in the exception list. And if this functionality is built into the Windows firewall somewhere, there should be a way to activate it. So, what I want to know is: whether there exists such an option, and if it does how to activate it.

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  • Why does just splitting an Ethernet cable not work?

    - by Sin Jeong-hun
    I thought the Ethernet is logically a one-line communication bus (for argument's sake, I am excluding hubs). All machines attached on the bus hears the same signals and the machines themselves try to avoid collisions by randomly backing off. http://computer.howstuffworks.com/ethernet6.htm If so, why would splitting one Ethernet line from my home router into two and connecting two computers not work? Why do I have to add a switch to it? *What the Internet said would not work. [4 port home router] ------[one Ethernet cable]-----[simple splitter]======[two computers] *What the Internet said I should do [4 port home router] ------[one Ethernet cable]-----[switch]======[two computers] Is this because of the signal degradation (reduced electric current)? Thank you for all the answers! The reason why I did not just use the two ports of my home router is... The 4-port gigabit router is in my room, and I had put a computer in another room (also my room, though). Since a wired network is far more reliable and secure, I had bought a long Ethernet cable and and connected the computer to the router. Now I was thinking about adding another computer to that room. I could buy another long Ethernet cable, but then there will be two cables between the rooms. The one line already is a minor annoyance, so I thought if I could share the one line between the two computers in that room. A switch would work, but it requires power and is a little bit pricey. That is why I wondered why it would not work to simply split the physical Ethernet cable. Apparently I do not completely understand how Ethernet and a switch work. I just have some bit of knowledge I heard in my college class.

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  • Mounted HDD not having enough permissions from Apache/PHP

    - by Dan
    Piwigo gallery, on apache and php. The root system is a RAID 128GB. /var/www/html is on the root file system. Mounted the 320GB hdd to /var/www/html/320 using defaults, it's an ext4 fs. Put a symlink to it in /var/www/html/galleries which is read by the gallery script so I can upload images to there, then click sync. It gives me the error: [./galleries/] PWG-ERROR-NO-FS (File/directory read error) PWG-ERROR-NO-FS: The file or directory cannot be accessed (either it does not exist or the access is denied) chmod 777 set on /dev/sdb1, /var/www/html, and /var/www/html/320 as well as the symlink galleries too. All recursive. chown apache:apache to everything too. PHP just can't read/write to it. I tried with and without the symlink, I've tried everything I can think of. Nothing. Any ideas how I can give apache/php permission to read/write to this drive? With 777 permissions all around it should already be able to.

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  • Folder Disappeared In Outlook but is still searchable?

    - by Jamie T
    Hi All currently having an issue where the personal folders in outlook seem to be disappearing. We have a folder called 0 Mail Filing, it seems to have disappeared, but doing a search for mail, it finds the mail and the folder is still in inbox/0 Mail Filing. Is there anyway to find the exact location, or get the folder back. We have checked all of the other subfolders and the folder is not in any of them. We are using Outlook 2007 with Exchange Server 2003. Thanks Jamie T

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