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  • How do I tunnel an HTTPS proxy through a virtual machine (VMWare)

    - by Kyle
    I have a personal setup at home using VMWare Workstation. I also have a set of Virtual Private Machines that run Squid, and therefore provide me HTTPS proxy tunnels. Using Proxifier, I can tunnel all traffic for given applications through these tunnels. However, I also have a few virtual machines for dev/staging/experimentation/etc. I generally just use NAT to provide Internet access to the machines, and if I need to use these proxies, I can just setup Proxifier (or a Linux equivalent) to pipe the traffic through them. No problem. But... I got to thinking: Wouldn't it be great if I could assign these proxy tunnels to a virtual machine, so that when I start up the VM, it has instant-on access through the tunnel and not my local connection? (EDIT: Of course, it would USE my local connection, but it would tunnel traffic through the proxy.) To be more clear: I want a solution that binds the proxy to a VM, so that when I start the VM, I don't have to use a proxy client to connect to the tunnel - I am already piping all traffic from that VM through that proxy. I did a bit of searching, and the closest thing I could find was this: How to route public static IP to a virtual machine on a vmware ESXi host? Which wasn't all that applicable. The proxies are protected by user/pass but do not filter by IP. Again, they are HTTPS proxies setup through Squid. Any ideas on how to make this happen? Thanks a ton.

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  • Preparing a hyper-v VM image

    - by Anteru
    We have a Hyper-V Windows Server 2k3, and we're hosting multiple VMs on it. However, right now, we always start the VM creation right on the server, i.e. when preparing a new Ubuntu image, I just install it into a new VM and set it up and when I'm happy we store the disk image. I wonder if there is a way to prepare a hyper-v image locally on my desktop machine instead? I'm running Windows 7, and I would love to be able to set up a VM so that we can copy the image over to the server and be done with it. This is for linux images only, and we definitely need the hyperv network integration. Is there a recommended way how to prepare hyperv images without running a hyperv instance somewhere?

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  • Cannot ping a VM from a Hyper-V host

    - by user1688175
    I am facing a weird situation in my network environment. My infrastructure looks like this: I have a D-LINK DIR-635 acting as my default gateway (192.168.0.1) A physical Windows 2012 Server (192.168.0.10) with the following roles: DHCP, DNS, AD DS and Hyper-V. A virtual Windows 2012 Server (192.168.0.50) which I intent to use as an IIS server (Role is not deployed yet). My virtual machine was able to get an IP address from the DHCP server and is working perfectly (I can ping the default gateway [by IP, FQDN or DNS Alias], the Hyper-V host and any site on the Internet (CNN.com for example). However I cannot ping the VM from my host. It says: Request Timed Out. Do you guys know what I might be doing wrong? Any support is appreciated! Thanks!

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  • Debian virtual server hangs on reboot, need help debugging

    - by BubuIIC
    I'm admin of a Debian 6 virtual server. I've been trying to diagnose this problem for a while but haven't gotten anything. The server hangs every time I want to reboot it. All services seem to be shutting down, I lose ssh connection. Then nothing. I have to restart it through the hoster's web-interface, which just gives me the options "Normal Boot" and "Rescue System". Normal boot then brings the server back to life. Possibly (probably?) related, the server does not boot into a newer kernel version, it's running 2.6.18 right now, but installed is actually 2.6.32. I don't know whether it hangs on shutdown or on startup, but booting through the web-interface works (except the kernel part). Am I missing something obvious? Where should I start looking? I have no idea how to diagnose the problem.

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  • When NOT to use virtualisation? [closed]

    - by Nils
    When virtualisation was new, we tried to virtualized everything. Then came the cases where the virtual machine was very much slower than a physical one. It boils down to the following ruleset (with us) when not to virtualize: Network-io-intesive applications (i.e. with many interrupts/packets) Disk-io-intensive (if not on SAN storage) RAM-intensive (this is the most precious resource) Now this is true for a combination of XEN using local DRBD storage. The same seems to be true for Hyper-V using DAS. I wonder - is it true for all combinations - and what are your limits on these combinations?

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  • Computers on network crashing

    - by Phil Cross
    We have recently upgraded our network to Windows 7 clients with Windows server 2008 servers. The upgrade was completed by the end of September and until now has been fine (apart from the minor bugs). Recently (within the last 2 weeks) we've notice all computers on the network (around 1000) start to slow down to the point their unusable. It starts at about 08:45 and finishes at 09:15. Because of this, we think something may be broadcasting across the network. This happens every day, between these times. I cant use my computer at all at the slowdown peak, and looking at task managers performance graphs, Physical memory is hovering around 35% and CPU usage is at 0-10% (idle) yet still crashing. I've looked on DHCPs server log and cant see anything which stands out. The only change we made prior to the slowdown was installing adobe CS6 on some computers, however the slowdown affects computers without CS6. We have 2 physical machines, each with around 5-7 virtual machines running on them with ample memory. Does anyone have any suggestions as to what we can do to narrow down whats causing the crashes? Any help, suggestions or advice would be appreciated.

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  • 64bit VM on Windows 7 x64

    - by argtag
    Is there any way to run a guest x64 VM on Windows 7 x64? No luck with Virtual PC 2007, Virtual Server 2005R2. (both blocked during install). I know the Windows Virtual PC app that comes with Win 7 doesn't allow 64bit Guests... thanks

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  • How create a virtual network for practice?

    - by light
    I need to organize a virtual network for practice with Windows Server 2008 and several workstations with Windows OS. To make it all I only have a laptop with Dual-Core 2.10Ghz, 3 GB RAM, 50 GB free space and Windows 7 on it. Also I have external USB 3.0 hard-drive with 250GB free space and flash disk with 8GB space. What can you suggest? Because I have limited resources, I think to install ESXi 5.1 on the main disk of my laptop as second OS, with installed Windows 7. I have no idea will it work or not, but after that I want to try to create hosts using availible space on external hard-drive. Is it possible?

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  • How to setup KVM partitioning?

    - by Richard
    I'm trying to install SolusVM/KVM on a server with one 500 GB HD and one 256 SSD. I am a complete beginner at Linux. SolusVM has a script on the site to download and install automatically, but how do I specify to install the script on the 500 GB HD and put the virtual machines on the SSD? And how should my partitioning look like? I want KVM isos and stuff on HD and virtual machines on SSD. Thanks a lot.

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  • Performance impact of running Linux in a virtual machine in Windows?

    - by vovick
    Hello, I'd like to know what performance impact I could expect running Linux in a virtual machine in Windows. The job I need Linux for is heavy and almost non-stop code compilation with GCC. Dual-boot doesn't look like a very attractive solution, so I'm counting on low VM overhead right now (10-20% would be fine for me, but 50% or more will be unacceptable). Did anyone try to measure the performance difference, are there any comparison tables? What virtual machine with the lowest overhead possible will you suggest? My host OS is Win7 and I've got a modern Core i7 with VT-x present. Thanks!

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  • SSH access to VM on windows 8 hyper-v

    - by samw
    I'm currently attending University and prefer a Linux environment to do much of my work, but all I have is a ThinkPad running Windows 8 Pro. Cygwin is nice, but it leaves me missing things like apt-get. My latest solution is to run an Ubuntu 12.04 VM with Windows 8's Client Hyper-V and use Cygwin for SSH access. I've looked everywhere online trying to set this up, but I haven't found much help. I've done this before using VirtualBox, so I figured this would be possible as well. Could anyone provide advice for setting up this environment? I'm completely uninitiated to Linux networking, virtual networking, and... pretty much all networking configuration, so this has been quite a challenge for me. What I've done so far: Created an external virtual switch to my wireless NIC. With this, I could successfully SSH to the VM with the leased IP address. But without a static IP, I would soon get disconnected. Created an internal virtual switch and attempt to "share" my main internet connection. (I was following the description on this page) Thank you all in advance!

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  • RAID 10 over RAID 5 when using SSDs

    - by root
    I am considering implementing an iSCSI shared storage array using SATA SSDs instead of the 15k RPM SAS drives we normally purchase. We normally use RAID 10 because of spindle contention with the random IO produced by virtualized workloads. I was wondering if we could switch to RAID 5 or RAID 6 to have more usuable space now that spindle contention is less of an issue. A question in my mind is how much overhead there is from the controller calculating parity. I am aware that this configuration will not allow TRIM to function. Our current workloads are running on a Dell H800 with a 24 bay external enclosure.

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  • Mac OS on a Windows PC

    - by HDawg
    I've done a little bit of reading on the topic, but nothing too clear has turned up. Why is it so difficult to run Mac OS on a virtual machine on a PC? Some sources say it's because of hardware architecture. Is there a clear, definitive reason?

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  • Is it possible to run OSX in a virtual machine?

    - by Frep D-Oronge
    I'd love to be able to try Mac OSX in a VM, preferable on something shiny and new like KVM for linux. I'm a Linux and Windows person, but would like to try out OSX without investing in the expensive hardware or accumulating yet another box to fit somewhere under my desk. (Read: no I don't want to get a Mac Mini) Is this possible? Legal? If so, what are the drawbacks and tricks

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  • Setting up a NAS with Citrix XenServer

    - by JasonBrown
    Just a quick query on anyone whos worked with XenServer, I want to setup a NAS at home but with virtualization (I've looked into VMWare Server and KVM, I quite like KVM!) but I was told about XenServer 5.5. I have comomodity hardware (ASUS board, dual core 2.66Ghz CPU with 8Gb RAM), I need to setup a fileserver to house about 2-3Tb worth of data (big chunky video - not porn!). Need to run Linux (preferably CentOS) but also run Windows virtualised for testing. I was thinking of going the XenServer route, however I want to be able to offer a VM access to the 2-3Tb of HDDs (5 HDD drives) directly so it can do its thing (maybe using FreeNAS). Would this be possible with XenServer? Or will I have to do more work - and another box - to offer this? My goals are to use FreeNAS (ZFS!) for the filesserver, CentOS for SVN and aother bits we need to use (LAMP Stack), Windows for our win32 testing all on one box. I see this iSCSI target bits and get scared.

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  • Hardware VPN suddenly slow, even after replacement. Free software VPN speed is fast [closed]

    - by Andrew
    In our company we have two remote users, one in Northern California and one in Texas, that connect via VPN. We have a hardware SSL VPN unit, and suddenly this week they experienced massive slowdown, to the point of speedtesting at 0.5 mbps when it is normally 7-10mbps. We replaced the hardware sslvpn but that did not solve the problem. If I have them connect using a free VPN tool like TeamViewer, their speeds are back to normal. Does anyone have any idea why this could happen? We have not made any infrastructure changes so this was very out of the blue and I'm confused as to why even replacing the hardware vpn didn't fix it, if using free software works just fine.

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  • What are the pros of switching DNS names with a database server hardware upgrade?

    - by wilbbe01
    When we upgrade to new hardware at work we usually increment a number in the DNS name. For example. We have a server called database-2, that is slated to become database-3 in the coming days. I haven't been able to find a good reason why this is good behavior. To me the work of trying to catch all end user machines, as well as all servers dependent on the database server is far riskier than simply moving the database and ip/name with it to the new hardware. A little over a year ago we spent several months of requests coming in, as infrequent users began using software that needed to be updated to point to a new DNS name. I am struggling to find answers as to why this is a good practice. So the question. Why is using DNS names as a "server hardware version identifier" a good idea? What am I overlooking? Thanks much.

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  • Droid's mediaserver dies on camera.takePicture()

    - by SirBoss
    On Motorola Droid, Firmware 2.1-update1, Kernel 2.9.29-omap1, Build # ESE81 When attempting to take a picture, mediaserver dies with a segmentation fault. I've tried putting takePicture in a timer and running it a few seconds after camera initialization to check for race conditions, but no change. Just calling Camera.open() doesn't cause the crash. Also, calling Camera.open() causes what I think is the autofocus motor to make a sort of ticking sound. Code that breaks: import android.app.Activity; import android.os.Bundle; public final class ChopperMain extends Activity { public void onCreate(Bundle savedInstanceState) { try { Camera camera = Camera.open(); catch (Exception e) { e.printStackTrace(); } camera.takePicture( new Camera.ShutterCallback() { public void onShutter() { ; } }, new Camera.PictureCallback() { public void onPictureTaken(byte[] data, Camera camera) { ; } }, new Camera.PictureCallback() { public void onPictureTaken(byte[] data, Camera camera) { ; } }, new PictureCallback() { public void onPictureTaken(byte[] data, Camera camera) { System.out.println("Ta da."); } } }); } catch (Exception e) { e.printStackTrace(); } } } Debug Log: D/CameraHal(10158): CameraSettings constructor D/CameraHal(10158): CameraHal constructor D/CameraHal(10158): Model ID: Droid D/CameraHal(10158): Software ID 2.1-update1 D/dalvikvm( 988): GC freed 2 objects / 56 bytes in 215ms D/ViewFlipper( 1074): updateRunning() mVisible=false, mStarted=true, mUserPresent=false, mRunning=false I/HPAndroidHAL(10158): Version 2988. Build Time: Oct 26 2009:11:21:55. D/CameraHal(10158): 19 default parameters D/CameraHal(10158): Immediate Zoom/1:0. Current zoom level/1:0 D/CameraHal(10158): CameraHal constructor exited ok D/CameraService(10158): Client::Client X (pid 10400) D/CameraService(10158): CameraService::connect X D/CameraService(10158): takePicture (pid 10400) I/DEBUG (10159): *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** I/DEBUG (10159): Build fingerprint: 'verizon/voles/sholes/sholes:2.1-update1/ESE81/29593:user/release-keys' I/DEBUG (10159): pid: 10158, tid: 10158 >>> /system/bin/mediaserver <<< I/DEBUG (10159): signal 11 (SIGSEGV), fault addr 00000008 I/DEBUG (10159): r0 00000000 r1 00000000 r2 a969030c r3 a9d1bfe0 I/DEBUG (10159): r4 00045eb0 r5 0000eb10 r6 000153a0 r7 a9c89fd2 I/DEBUG (10159): r8 00000000 r9 00000000 10 00000000 fp 00000000 I/DEBUG (10159): ip a969085c sp bec4fba0 lr a9689c65 pc a9d1bfde cpsr 60000030 I/DEBUG (10159): #00 pc 0001bfde /system/lib/libutils.so I/DEBUG (10159): #01 pc 00009c62 /system/lib/libcamera.so I/DEBUG (10159): #02 pc 00007b0c /system/lib/libcameraservice.so I/DEBUG (10159): #03 pc 00021f98 /system/lib/libui.so I/DEBUG (10159): #04 pc 00015514 /system/lib/libbinder.so I/DEBUG (10159): #05 pc 00018dd8 /system/lib/libbinder.so I/DEBUG (10159): #06 pc 00018fa6 /system/lib/libbinder.so I/DEBUG (10159): #07 pc 000087d2 /system/bin/mediaserver I/DEBUG (10159): #08 pc 0000c228 /system/lib/libc.so I/DEBUG (10159): I/DEBUG (10159): code around pc: I/DEBUG (10159): a9d1bfcc bd1061e3 f7f3b510 bd10e97e 4d17b570 I/DEBUG (10159): a9d1bfdc 6886a300 460418ed fff4f7ff d10a4286 I/DEBUG (10159): a9d1bfec 46234913 20054a13 f06f1869 18aa040a I/DEBUG (10159): I/DEBUG (10159): code around lr: I/DEBUG (10159): a9689c54 e0240412 0204f8d0 050cf104 edf0f7fd I/DEBUG (10159): a9689c64 f7fd4628 f8d4ecf2 b1533204 f852681a I/DEBUG (10159): a9689c74 18581c0c 7101f504 ed82f7fd f8c42000 I/DEBUG (10159): I/DEBUG (10159): stack: I/DEBUG (10159): bec4fb60 4000902c /dev/binder I/DEBUG (10159): bec4fb64 a9d19675 /system/lib/libutils.so I/DEBUG (10159): bec4fb68 00002bb4 I/DEBUG (10159): bec4fb6c a9d1b26f /system/lib/libutils.so I/DEBUG (10159): bec4fb70 bec4fbbc [stack] I/DEBUG (10159): bec4fb74 00095080 [heap] I/DEBUG (10159): bec4fb78 a9c8c028 /system/lib/libcameraservice.so I/DEBUG (10159): bec4fb7c a9c8c028 /system/lib/libcameraservice.so I/DEBUG (10159): bec4fb80 00015390 [heap] I/DEBUG (10159): bec4fb84 a9c89fd2 /system/lib/libcameraservice.so I/DEBUG (10159): bec4fb88 00045ebc [heap] I/DEBUG (10159): bec4fb8c afe0f110 /system/lib/libc.so I/DEBUG (10159): bec4fb90 00000000 I/DEBUG (10159): bec4fb94 afe0f028 /system/lib/libc.so I/DEBUG (10159): bec4fb98 df002777 I/DEBUG (10159): bec4fb9c e3a070ad I/DEBUG (10159): #00 bec4fba0 00045eb0 [heap] I/DEBUG (10159): bec4fba4 00045ebc [heap] I/DEBUG (10159): bec4fba8 000153a0 [heap] I/DEBUG (10159): bec4fbac a9689c65 /system/lib/libcamera.so I/DEBUG (10159): #01 bec4fbb0 a9c8c028 /system/lib/libcameraservice.so I/DEBUG (10159): bec4fbb4 00015390 [heap] I/DEBUG (10159): bec4fbb8 000153a0 [heap] I/DEBUG (10159): bec4fbbc a9c87b0f /system/lib/libcameraservice.so I/DEBUG (10159): debuggerd committing suicide to free the zombie! I/DEBUG (10426): debuggerd: Mar 22 2010 17:31:05 W/MediaPlayer( 1021): MediaPlayer server died! I/ServiceManager( 984): service 'media.audio_flinger' died I/ServiceManager( 984): service 'media.player' died I/ServiceManager( 984): service 'media.camera' died I/ServiceManager( 984): service 'media.audio_policy' died W/Camera (10400): Camera server died! W/Camera (10400): ICamera died E/Camera (10400): Error 100 I/System.out(10400): Camera error, code 100 W/AudioSystem( 1021): AudioFlinger server died! W/AudioSystem( 1021): AudioPolicyService server died! I/ (10425): ServiceManager: 0xad08 E/AudioPostProcessor(10425): E/AudioPostProcessor(10425): AudioMgr Error:Failed to open gains file /data/ap_gain.bin E/AudioPostProcessor(10425): E/AudioPostProcessor(10425): AudioMgr Error:Failed to read gains/coeffs from /data E/AudioPostProcessor(10425): Audio coeffs init success. I/CameraService(10425): CameraService started: pid=10425 D/Audio_Unsolicited(10425): in readyToRun D/Audio_Unsolicited(10425): Create socket successful 10 I/AudioFlinger(10425): AudioFlinger's thread 0x11c30 ready to run E/AudioService( 1021): Media server died. E/AudioService( 1021): Media server started. W/AudioPolicyManager(10425): setPhoneState() setting same state 0

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  • USB to Serial cables with CDC support

    - by Harsha
    Hi all, Are there are USB to Serial cables with CDC support? I recently bought these below mentioned cables which claims that they are CDC 1.1 complaint. However, when we received the cables on our verification we found that they were reporting vendor specific device descriptors. Manufacturer Barcode Part Number Quantity Link CABLEMAX 45643276422244 USB-1S1PQ 4 http://www.usbgear.com/USB-1S1PQ.html CABLEMAX USBG-US-232 USBG-US-232 4 linkhttp://www.usbgear.com/USBG-US-232.html linkhttp://www.made-in-china.com/showroom/trankoo/product-detailebsQoMuKExrj/China-USB-To-RS232-Cable.html Has anyone used USB to Serial cables with CDC support? Please advise! Thanks for your help.

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  • Which platform can we expect one's complement being used there?

    - by Jian Lin
    For some questions such as checking whether a number is odd or even, I noted the comment, a & 1 won't work when it is a one's complement machine or when the code is ported to a platform that uses one's complement. Since 30 years ago on the Superboard, TRS-80, Apple II, I haven't seen a system with one's complement. Are there popular systems that use one's complement still, or do we have some cell phone or mobile device that uses one's complement?

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  • Programming for Multi core Processors

    - by Chathuranga Chandrasekara
    As far as I know, the multi-core architecture in a processor does not effect the program. The actual instruction execution is handled in a lower layer. my question is, Given that you have a multicore environment, Can I use any programming practices to utilize the available resources more effectively? How should I change my code to gain more performance in multicore environments?

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  • USB Serial cable with CDC support

    - by Harsha
    Hi All, I bought a USB to Serial cable which claims to be CDC compliant. But the bInterfaceClass value in interface descriptor is 0xFF(which is vendor specific). I was expecting it to be 0x02 (Communications and CDC control). In the device manager, i found that the drivers being loaded are ser2pl.sys and serenum.sys. I had learnt usbser.sys is the windows CDC driver, but it was not loaded for my cable. I am pretty much new to this CDC, so i have following questions 1.Does this indicate that the cable is not CDC compliant 2.Can i make this cable CDC compliant (since CDC is a driver functionality), by loading usbser.sys. If yes how?

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  • How do I work out IEEE 754 64-bit Floating Point Double Precision?

    - by yousef gassar
    enter code herehello i have done it in 32 but i could dont do it in 62bits please i need help I am stuck on this question and need help. I don't know how to work it out. This is the question. Below are two numbers represented in IEEE 754 64-bit Floating Point Double Precision, the bias of the signed exponent is -1023. Any particular real number ‘N’ represented in 64-bit form (i.e. with the following bit fields; 1-bit Sign, 11-bit Exponent, 52-bit Fraction) can be expressed in the form ±1.F2 × 2X by substituting the bit-field values using formula (IV.I): N = (-1) S × 1.F2 × 2(E – 1023) for 0 < E < 2047.........................….(IV.I) Where N= the number represented, S=Sign bit-value, E=Exponent=X +1023, F=Fraction or Mantissa are the values in the 1, 11 and 52-bit fields respectively in the IEEE 754 64-bit FP representation. Using formula (IV.I), express the 64-bit FP representation of each number as: (i) A binary number of the form:- ±1.F2 × 2X (ii) A decimal number of the form:- ±0.F10 × 10Y {limit F10 to 10 decimal places} Sign 0 1 Exponent 1000 0001 001 11 Fraction 1111 0111 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 52 Sign 1 1 Exponent 1000 0000 000 11 Fraction 1001 0010 0001 1111 1011 0101 0100 0100 0100 0010 1101 0001 1000 52 I know I have to use the formula for each of the these but how do I work it out? Is it like this? N = (-1) S × 1.F2 × 2(E – 1023) = 1 x 1.1111 0111 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 x 1000 0001 00111 (-1023)?

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