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  • Does anyone know where I could find a 2 input USB voltage meter?

    - by John O
    What we really need is a tiny UPS, of sorts. We'll be hooking up a solar cell and a battery to a single board computer. Currently, that SBC is a custom Pic32 device, and it does it's own UPS and voltage monitoring duties. I've been tasked with trying to replicate all of its features with off the shelf products... and for the most part I've succeeded. But I don't currently have any way to switch between two sources of juice, or monitor when they're getting low. These guys have something: http://www.mini-box.com/picoUPS-100-12V-DC-micro-UPS-system-battery-backup-system I really like it, the price is well within the budget. We might even work it in though it does 12V and I'll probably be using 5V... there are enough engineers on hand to figure out something. But I'd still have no idea what the voltage was for the PV or battery. I was hoping that there was some simple little USB multimeter thing that I could use to monitor this with, but I can't seem to come up with anything. I've found all sorts of cool hardware, but nothing that will help us. Does anyone know of anything?

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  • Rebuilding RAID1 in Ubuntu

    - by John Utech
    I had my second HD in my RAID1 come up with bad sectors. So I got another drive and pulled out the bad sector drive and put the new drive in. With the original working RAID1 drive in the computer it failed to boot. I manually copied everything from the old drive over via a Gparted Live CD. Still no booting. Kind of scratching my head here as I can see that both of the drives have data on them but are unable to get either of them to boot. I used a Ubuntu live CD and couldn't even manually mount either of the drives, which I thought was really the odd part. Not sure where to go from here.

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  • Viewing local websites on my iOS device over Wi-fi

    - by John
    Trying to view some local html/css/js files in a mobile browser on my iOS device. Thought maybe file-sharing would be an option, and is, but I'm not completely satisfied with it. Any time I try to do the following an error occurs. Web sharing is on and available at http://192.168.1.101/~user but I have to manually copy the files in. If I try to symlink a folder in so that the address could be viewed at ''~user/some_dir by issuing $ ln -s /Users/user/dev/some_dir ~/Sites/ then I get a 403 forbidden error. I've tried to remedy this by modifying a user.conf file in /private/etc/apache2/ and using the following syntax: <Directory "/Users/user/Sites/"> Options Indexes MultiViews SymLinks AllowOverride None Order allow,deny Allow from all </Directory> but nope, still doesn't work. I get a 403 error. If I try to symlink each individual file in instead of using a directory as a sub-directory, same error. Any help would be greatly appreciated! I'd just like to symlink directories into the ~/Sites one and browse them on my iOS device over wifi. I'm on OS X 10.7 Lion trying to connect with iOS 5.

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  • Windows 7 to search a network drive

    - by John
    Is there any way that I can have windows 7 clients be able to go to "start" and type in the name of a file that is located on a network drive? I have read that this is possible through indexing, but to get through the indexing steps I need to make files available offline. This network drive I speak of has about 2tb of files on it. How in the heck can I keep all this straight. I imagine there would be syncing errors everywhere if I were to make all of these files available offline. Not to mention not all files being current due to the large amounts of files. Anyone have suggestions?

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  • How can one restrict network activity to only the VPN on a Mac and prevent unsecured internet activity?

    - by John
    I'm using Mac OS and connect to a VPN to hide my location and IP (I have the 'send all traffic over VPN connection' box checked in teh Network system pref), I wish to remain anonymous and do not wish to reveal my actual IP, hence the VPN. I have a prefpan called pearportVPN that automatically connects me to my VPN when I get online. The problem is, when I connect to the internet using Airport (or other means) I have a few seconds of unsecured internet connection before my Mac logs onto my VPN. Therefore its only a matter of time before I inadvertently expose my real IP address in the few seconds it takes between when I connect to the internet and when I log onto my VPN. Is there any way I can block any traffic to and from my Mac that does not go through my VPN, so that nothing can connect unless I'm logged onto my VPN? I suspect I would need to find a third party app that would block all traffic except through the Server Address, perhaps Intego Virus Barrier X6 or little snitch, but I'm afraid I'm not sure which is right or how to configure them. Any help would be much appreciated. Thanks!

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  • Troubleshooting Network Speeds -- The Age Old Inquiry

    - by John K
    I'm looking for help with what I'm sure is an age old question. I've found myself in a situation of yearning to understand network throughput more clearly, but I can't seem to find information that makes it "click" We have a few servers distributed geographically, running various versions of Windows. Assuming we always use one host (a desktop) as the source, when copying data from that host to other servers across the country, we see a high variance in speed. In some cases, we can copy data at 12MB/s consistently, in others, we're seeing 0.8 MB/s. It should be noted, after testing 8 destinations, we always seem to be at either 0.6-0.8MB/s or 11-12 MB/s. In the building we're primarily concerned with, we have an OC-3 connection to our ISP. I know there are a lot of variables at play, but I guess I was hoping the experts here could help answer a few basic questions to help bolster my understanding. 1.) For older machines, running Windows XP, server 2003, etc, with a 100Mbps Ethernet card and 72 ms typical latency, does 0.8 MB/s sound at all reasonable? Or do you think that slow enough to indicate a problem? 2.) The classic "mathematical fastest speed" of "throughput = TCP window / latency," is, in our case, calculated to 0.8 MB/s (64Kb / 72 ms). My understanding is that is an upper bounds; that you would never expect to reach (due to overhead) let alone surpass that speed. In some cases though, we're seeing speeds of 12.3 MB/s. There are Steelhead accelerators scattered around the network, could those account for such a higher transfer rate? 3.) It's been suggested that the use SMB vs. SMB2 could explain the differences in speed. Indeed, as expected, packet captures show both being used depending on the OS versions in play, as we would expect. I understand what determines SMB2 being used or not, but I'm curious to know what kind of performance gain you can expect with SMB2. My problem simply seems to be a lack of experience, and more importantly, perspective, in terms of what are and are not reasonable network speeds. Could anyone help impart come context/perspective?

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  • Is there any way to remotely configure a Microsoft Lync account?

    - by John O
    There are no perl modules for Lync. No open source clients. Windows Powershell can do some things with it, but only on the server on which the server software is installed. It would be useful to be able to forward a certain desk phone number (we use Lync for voip) to a personal cell phone. We can do this from our own desktop machines, but only using the Lync client. It would be nice to be able to have a cron script run that just did rotations, I wouldn't have to carry around the lousy on-call phone with me. communicator.exe doesn't take any useful parameters. Nor are there any obvious function names in the DLLs that would let me just use rundll32.exe to accomplish this. There is a Lync SDK, but no examples of changing phone forwarding, and my Windows 7 machine refuses to install the Silverlight SDK dependency for some reason I can't fathom. Does anyone have any other ideas how I might accomplish this?

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  • How can I disable chrome extensions (when Chrome is unresponsive)?

    - by John
    I'm having a problem where Chrome won't ever fully start (cursor just spins indefinitely and can't use the any menus or buttons in Chrome). I think it is due to an extension I installed but since the browser is unresponsive, I can't do anything through Chrome itself. Is there a flag to disable all extensions for Chrome or a config file I can manually edit to disable extensions so I can figure out what exactly is causing it? I'd prefer to not have to blow it away and reinstall as I might just install the offending extension again (assuming that is what is causing the issue).

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  • Tracking down laptops Google has never heard of

    - by John
    Using MS tools to get information on PCs using our software, our customers have sent several Lenovo systems which have names we simply cannot find using Google... no search results at all. Considering these names/ids are returned by querying the system directly, not asking the customer to write it down by looking at the box, this seems odd. The ones we have so far (more than one of each) are: Lenovo 2241BL9 Lenovo 6463Y4H My guess is these are Thinkpads after Lenovo took over the brand, but can anyone help me out with this detective work? edit: the 2nd one does turn up some driver downloads and this page, but it's unclear what any of that means. Is the 6463y4h just a T61? http://smolts.org/reports/view_profile/%20ThinkPad%20T61

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  • What is the correct way to distinguish services to which RADIUS request belongs?

    - by John
    If I have 1 generic RADIUS server and a number of clients (VoIP server, VPN server, WIFI access point) how to distinguish senders (NAS) of access and accounting requests? I didn't found anything helpful by reading all related RFCs, there just NAS-IP-Addess or NAS-Identifier is required, but this attributes usually represents IP address of the NAS and this address can not be used as a robust identifier, because it's often possible to fall into the case when 2 different NASes are running on the same server and this attributes can not be customized. Any ideas?

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  • my HP desktop with Windows Vista wont boot

    - by John
    It continues to loop to a BSOD and I cant get a dos prompt or repair screen, I dont have recovery disks but I have brought up a window, black, with gray title bar that is labeled Edit Boot Options, below that it has Edit Windows boot options for: Windows Vista (TM) Home Premium Path: \WINDOWS\system32\winload.exe Partition:1 Hard Disk: 1549f232 and then it has a place to enter something starting with one of these [ and one or two lines down it has ] what do i enter in this space and is there something i can enter that would help solve my boot up issues

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  • Best way to backup Active Directory with a single domain controller

    - by John Hall
    I have a domain with about 15 users and a single Windows Server 2008 domain controller. Some recent issues with my RAID controller have made me reconsider how I go about securing the AD data. Currently I run a System State Backup nightly. However, it seems that it is impossible (or at least difficult and unsupported) to restore that to any other machine than the one from which it was taken. Adding a second DC to the domain seems expensive and overkill for such a small network. Is there no other way to backup the AD data?

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  • Does Xenapp require Windows Terminal Services (Remote Desktop) licenses?

    - by John Virgolino
    We have a Xenapp 5.x server running for over a year now. It does not have any purchased Terminal Services (Remote Desktop) licenses installed. It is running on a Windows 2008 Server box. I am aware that Terminal Services runs fine for about 3 months and then supposedly stops issuing licenses. On occasion, Xenapp stops working and we see lots of License errors in the event log, although not necessarily every time. In most cases, a reboot or 2 resolves the problem. We figured it was because of the lack of TS licenses. I spoke with Citrix and they said we had to have the licenses, but it begs the question that if we have to have the licenses, how does it work the majority of the time without them!!?? I have not received a straight answer yet and before I tell my client to shell out more money, I need to understand the technical reasoning for how this is actually working if we are breaking the rules here. We will buy the licenses if necessary, but there has to be an explanation for this. I am hoping the community can help where Citrix apparently cannot. Thanks much!

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  • Best way to restrict FTP access to a single directory?

    - by John Debs
    I have a VPS running Ubuntu 10.04, and I'd like to give someone SFTP access to a single directory, but prevent them from seeing anything else on the system. What's the best way to pull this off? I considered removing "everyone" permissions from everything on the system, but that seems like a really blunt tool for this problem (and one that'll cause other issues) - I'm hoping there's a better option here. Edit: I appreciate the answers! (And I learned a bunch reading/researching through them). I ended up finding and using this guide from Linode as it spelled all the steps: http://library.linode.com/security/sftp-jails/

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  • How to issue machine certificates to Android devices trying to connect to L2TP VPN (L2TP/IPsec with Certificate)?

    - by John Hendrix
    I are trying to find a way to connect Android devices to our VPN box running Windows Sever 2008. We manage to configure a couple Android devices to connect via PPTP. However, I would like to be able to connect using L2TP/IPSec with certificates instead. I've managed to export and apply the Enterprise CA's certificate on the Android phone, but are totally lost on how to issue a machine certificate to the Android phone. Is it even possible? If so, what are steps I should take to issue the machine certificate and enable the Android phone to connect via L2TP/IPsec with certificates? Thank you for your help!

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  • Broken screen on laptop?

    - by John
    I recently damaged the screen on my HP Notebook...now my main concern is that I have Roboform installed and on my taskbar. The trouble is, because the screen is totaled, I can't see anything, and I discovered, to my horror, that I haven't backed any of the IDs and passwords up to a text document. Of course, I cannot access any of my content that hosts an ID name and password at all unless I can access Roboform that is installed on the notebook! Now hopefully I have ordered a SATA/USB cable to access the hard drive that I now removed form the notebook will I be able to access roboform that way and ALL the log-in details?

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  • Arduino IDE "launch 4j" error

    - by John
    I have a computer running Windows XP. I am trying to run the Arduino IDE 0022. I double-click on arduino.exe, it waits about 30 seconds on the load up title screen, and then it gives me this error: Launch 4j: an error occurred while starting the application My only choice is to click "OK"; the error goes away, and the Arduino IDE closes. If I try to delete the Arduino files (to try overwriting with some different files), I get an error that doesn't allow me to do so: Cannot delete awt.dll: Access denied Make sure the disk is not full or write protected and that the file is not currently in use. The only way to delete the file is by restarting the computer. So something must still be trying to run after that first error. I have noticed in Task Manager that some Java programs are still running: javaw.exe (3 processes) I think this is a problem with Java, but I checked and updated all of my Java software and it is all up to date. I have looked on other forums for this issue and none of them seemed to help. From the forums I have tried: Different Arduino IDE versions Updating Java Opening arduino.exe as Administrator Nothing has worked. Anyone have any suggestions?

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  • computer reboots randomly, can't find ssd

    - by John Barry
    My comp's been restarting at random times, and when it comes back the SSD drive can't be found by the BIOS and it doesn't boot. Powering down and starting up again fixes it 90% of the time, with a second reboot occasionally required. Does not seem to be heat related; it's never happened with me actually on the computer. It has happened while acting as the squeezebox server, however. It's a Sandy-Bridge i7 arch if that helps. To add: I've also run Windows Memtest and it came back with no issues.

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  • iptables redirect single website traffic to port 8080

    - by Luke John Southard
    My goal is to be able to make a connection to one, and only one, website through a proxy. Everything else should be dropped. I have been able to do this successfully without a proxy with this code: ./iptables -I INPUT 1 -i lo -j ACCEPT ./iptabels -A OUTPUT -p udp --dport 53 -j ACCEPT ./iptables -A OUTPUT -p tcp -d www.website.com --dport 80 -j ACCEPT ./iptables -A INPUT -m conntrack --cstate ESTABLISHED,RELATED -j ACCEPT ./iptables -P INPUT DROP ./iptables -P OUTPUT DROP How could I do the same thing except redirect the traffic to port 8080 somewhere? I've been trying to redirect in the PREROUTING chain in the nat table. I'm unsure if this is the proper place to do that tho. Thanks for your help!

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  • scsi and ata entries for same hard drive under /dev/disk/by-id

    - by John Dibling
    I am trying to set up a ZFS pool using 4 bare drives which I have attached to my Ubuntu system via a SATA hot swap backplane. These are Hitachi SATA drives. When I list the contents of /dev/disk/by-id, I see two entries for each drive: root@scorpius:/dev/disk/by-id# ls | grep Hitachi ata-Hitachi_HDS5C3030ALA630_MJ1323YNG0ZJ7C ata-Hitachi_HDS5C3030ALA630_MJ1323YNG1064C ata-Hitachi_HDS5C3030ALA630_MJ1323YNG190AC ata-Hitachi_HDS5C3030ALA630_MJ1323YNG1DGPC scsi-SATA_Hitachi_HDS5C30_MJ1323YNG0ZJ7C scsi-SATA_Hitachi_HDS5C30_MJ1323YNG1064C scsi-SATA_Hitachi_HDS5C30_MJ1323YNG190AC scsi-SATA_Hitachi_HDS5C30_MJ1323YNG1DGPC I know these are the same drives because I wrote down the serial numbers, and all the other drives in this system are either Seagate or WD. The serial number for the first one, for example, is YNG0ZJ7C. Why are there two entries here for each drive? More to the point, when I create my ZFS pool which one should I use; the scsi- one or the ata- one?

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  • SQL Server Licensing

    - by John
    We are looking at moving our fractured code base that uses MySQL in some places and SQL Server in other places. I'm suggesting that for our purposes we don't need anything that MySQL can't do. The argument is that we have to have SQL Server anyway because we have Exchange and SharePoint. I always thought that SQL Server didn't require a separate license when using Exchange or SharePoint (WSS version). We are also using TFS. If there is a server product from Microsoft which requires the use of SQL Server then doesn't it come with some form of licensing for SQL Server? Can anyone lend some insight to this? Thanks!

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