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• Cannot ping my domain-joined server - Can only ping domain controller - host unreachable

  - by Vazgen

  I have a HyperV Server hosting a Domain Controller VM (192.168.1.50) and another VM (192.168.1.51) joined to this domain. I have: domain controller as DNS server forward lookup zone for the domain with host record for 192.168.1.50 and 192.168.1.51 Windows client has primary DNS server set to 192.168.1.50 and secondary to my ISP I can ping 192.168.1.50 (domain controller) successfully but cannot ping 192.168.1.51 (domain-joined VM) When pinging from Windows client: ping 192.168.1.51 Reply from 192.168.1.129 : Destination host unreachable When pinging from Domain Controller: ping 192.168.1.51 Reply from 192.168.1.50 : Destination host unreachable I have 2 virtual network adapters one PRIVATE for intranet (set to static IP 192.168.1.51) and one PUBLIC for internet with a dynamic IP. I noticed the the PUBLIC one inherited the "mydomain.com" domain subtitle after joining the domain... I don't know what this meant but it seemed more intuitive to me to switch THIS ONE to have the static IP. After I configured that I still could not ping but now I get: ping 192.168.1.51 Request timed out What seems to be the issue, I'm relatively new to networking.

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• PXE boot very slow when PXE server is virtualbox

  - by sqrtsben

  As I read in questions here and on the Internet, PXE and Virtualbox don't seem to like each other too much. My problem is the following: I have a virtualized machine which hosts the DHCP and PXE server for 10 native clients. They are rebooted roughly every 10 mins and on each reboot, they need to boot a small linux (the initrd is ~4MB). Before, I had a native machine running and booting via PXE was very fast. Now, looking at the output of nload, I only get 500kbit/s whenever one machine is booting. The machines are connected via a GBit switch, so that can't be it. Also, when testing the connection speed to the outside, I have the full bandwidth available. Is VBox just unable to deal with large amounts of UDP packets? Can anyone point me in the right direction here?

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• Is 850W SMPS enough for the below Config?

  - by bali208

  We are planing to assemble a file server of the following configuration. 1) Intel S2400SC2 Motherboard. 2) Xeon 2407 Processor x 2 (Dual Processors) 3) 8gb x 8 ECC DDR3 RAM 4) One 2 TB Seagate HDD. 5) 8 cabinet fans fitted for NZXT Switch 810 Cabinet. Our question is is CoolerMaster 850 Watts power supply enough for our machine? Or we have to put 1050 Watts power Supply? Please suggest the best Brand and Wattage of SMPS we have to buy for our system. Thank you.

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• Laptop HDD failure imminent?

  - by Andrei Rinea

  I have an HP Compaq 615 laptop with an 160 GB 7200 rpm HDD. Hasn't been dropped or shaken, in fact it almost always stayed on my desk. I've treated it as nice as I could. The other day, however, my OS froze and I could hear a repeated clink-clink-clink coming from the HDD zone of the laptop. I had to switch off hardware-ly the laptop and re-start it. It worked very well after, including now. However I backed up immediately the core data on my USB drive and ordered an external USB HDD for periodic backups. Will it die soon or it was just a "blip"?

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• Office communicator voice chat

  - by Gareth Simpson

  My company recently mandated a switch from Skype to Office Communicator for IM / voice chat. While Skype was never the be all and end all of VOIP, it was at least usable. With Communicator, if one person is talking, everyone else is basically silent (or as good as) so a normal conversation is impossible. No one can interrupt anyone else, if two people start talking at once it's a crap shoot who gets to be heard and often the person who is inaudible doesn't know it. There do not seem to be any client side settings to fix this. Is there anything that can be done server side or is it just rubbish?

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• Two tor clients

  - by Intellektus

  I have been experimenting with the thought of running two Tor clients at once on my machine. So I decided to try it and modified the source a bit to let me run two clients at once (of course with separate data dirs). But they both get the same exit node, and if I try to switch exit node on one of them via its control port, they both get switched. I have been experimenting with this some more, and Tor always seem to get the same IP, even if I run several separate clients (on the same machine) at once. Is this the expected behavior?

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• My acer aspire laptop suddenly stopped working, just a blank screen

  - by mazda

  My acer aspire laptop suddenly stopped working while it was connected to my nokia mobile modem through usb. It stopped with power swich staying on and no response to clicking off, no irregular sound, nothing but just a blank screen. I disconnected the power and battery quickly but power switch did not respond at all and even the power indicator didn't turn on again. the display was also gone after disconecting the power and removing battery. It has no response or any sign of power while both battery and power supply are working. What do you think? A completely dead mainboard? Does the MB has any safty board or fuse that could be replaced? Any suggestion will be appreciated, Thank you.

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• Microsoft word slow switching and safe mode

  - by huggie

  I don't know what I did, but recently when I opened Microsoft Word document, I experienced very slow app switch between it and other applications. When I start Word in Word's safe mode (as described here http://wordprocessing.about.com/od/troubleshootin1/qt/safemode.htm ), the issue disappears. Now I don't know where to find out which plugins were loaded that's causing the problem. Or where the normal.dot is if that's the problem. I'm on Windows 7 64 bit. Thanks.

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• Cannot boot to HDD or Optical when Motherboard in AHCI mode

  - by Shevek

  I have an Abit AB9 QuadGT motherboard and am trying to swap over to AHCI mode. I have an existing Windows 7 installation which was installed under IDE mode. I have set the msahci registry setting to 0. When I try to boot in AHCI mode I get "DISK BOOT FAILURE, INSERT SYSTEM DISK AND PRESS ENTER". I have tried booting with my Win 7 DVD in the optical drive. There is 1 SSD (System), 1 HDD (Data) and 2 optical drives connected via SATA If I switch back to IDE mode everything boots fine, either from the SSD or from a CD or DVD in the optical drive. Why can't I use AHCI mode?

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• New Xming Windows Doesn't Grab Focus

  - by Isaac Rabinovitch

  I do my day-to-day work on Windows 7 (no, that's not going to change) and often need to work with Linux running on Parallels. Switching between Windows and Linux desktops is a pain, so I've installed Cygwin+Xming (less complicated than CygwinX). I open a Cygwin command line using mintty, then do ssh -Y to get a Linux command line. Doing "vim" on the Linux command line causes the vim window to appear on my Windows desktop. This is great, except that the new vim window doesn't automatically grab the focus, which stays with the mintty window. Years of habit cause me to start typing immediately without clicking on the new window. Having to switch manually is very jarring. Any way to make it automatic?

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• Is it possible to have a computer run two OS's in memory at the same time?

  - by Hebon

  I'm sick of needing to reboot my computer every time I wish to use another OS, or run a virtual machine that skimps on power. With the onset of large amounts of memory for computers nowadays I began to think that there must be some way to run two OS's in memory with a way to switch between the two. In my mind, it doesn't seem too difficult; a compatibility layer boots up after bios, which in turn boots to OS1. While in OS1, software is run that triggers a save to ram boots back to the compatability layer, and then boots to OS2. This way, the OS's can be used side by side and boot times are cut drastically short since both OSs are already in ram. Both OS's have their own designated and protected memory so there is no problem there... I mean, it seems fine, but no one has done it, so there must be some reason as to why. I would love some insight into this please.

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• Resize videos with different widths to a fixed height preserving aspect ratio with ffmpeg

  - by Axarydax

  I'd like to convert a lot of video files to flash video for our company's website. I have a requirement that all of the videos must be in 360p format, so their size would be Nx360. FFMpeg uses -s argument to specify target resolution as WxH. I don't know Width, as it depends on source file aspect ratio. If source is 640x480, target will be 480x360. If source is 848x480, target will be 636x360. Is there a way to do it with some switch of ffmpeg? That it will preserve aspect ratio and I'll only specify the height of target video? I could easily solve it by making a program that will launch ffprobe to get source video size, calculate aspect ratio and then calculate a new width.

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• I can't get router and switches configured properly for my home office network

  - by BernicusMaximus

  Networking Gurus, I recently built a new detached garage, with an office above. As such I had it tied into my existing home ethernet wiring. The ethernet signal is coming into the garage just fine, but I can not get my network configured the way I want because of problems trying to link the various router/switch devices. Please see the following links for the network diagrams: Home Network So basically, I can't my future state to work. I'm not sure if I'm using incompatible switches or what, but I tried the future state with some 4 port switches from best buy and had no luck. I resorted to setting up the Current State so I could operate. What I am looking for is help on how best to get my future state to work. Is this possible with my current configuration, and if not, what should I do? Any help is appreciated. Thanks, Bernie

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• What happens to modern-ui apps when they aren't in the foreground?

  - by Mark Allen

  If I start a modern-ui app and then switch to a different app or a normal program running on the desktop, what happens to the first app? I've heard something about the first app being suspended, but realized that I don't really know that for certain. I mean, could you write a SETI@Home (BOINC) app if you wanted to, or will apps that aren't in the foreground always be suspended? Can you change that? I could see changing that based on available resources, running from AC vs. battery, etc. This morning I heard about an iPad being recovered thanks to the "Find my iPad" app, and was wondering whether you could write such a thing as a modern-ui app and have it work without being the running foreground app. (I'm aware that you'd just write a Windows service or similar, that's not what I'm asking about.)

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• Lot of Multicast traffic on LAN

  - by Nel

  Recently the whole network at work is being hit by multicast traffic originating on the LAN itself. I did some investigating and the service which seems to be responsible is ws-discovery. I have attached a screenshot of wireshark capturing the traffic. I have tried shutting down the source machine from which it was originating, but the multicast traffic still seems to be present in the network. My network topology 2 subnets - 10.10.10.0/24 and 10.20.10.0/24. Gateway is a debian system. We have 3 switches for 3 floors. They are all unmanaged Dlink 24-port switches. Multicast blocking at switch level is out of the question. Any solutions? :(

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• Removing a custom vim configuration

  - by Hovercouch

  I've added a lot of small mappings to my vimrc that help me work, like noremap H ^ and inoremap jk <esc>. It's diverged enough from vanilla vim that other people at work have trouble coding on my computer. This has been making it harder to pair program with people and get help reviewing code. What I'd like is a way to quickly toggle on/off all of my custom mappings and switch between my vim config and a more 'conventional' one (like relative vs absolute numbering). What would be the best way to do this?

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• How do I maximize and check my gigabit transfer rate?

  - by J Penguin

  I'm trying to maximize my LAN transfer speed. LAN cards and switch are all gigabit on a CAT 6 cable. Modes are set correctly to 1000 full duplex. CentOS server Testing with ftp from both windows and fedora, I'm only having the speed around 11MB/s. On windows I notice that the first few seconds of file transfer I'm actually getting around 25MB/s before it drops to 11MB/s Can anyone please recommend me what my next step should be to increase this performance? Are there any utilities I can use to test the file transfer speed without taking hard drive speed into consideration? The only thing I know is the MTU which I will have to wait until the office hour is over before I can play with it. If there are anything else I should be aware of, please please let me know. Thank you!

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• Snap Server 18000 connection help!

  - by sicko666

  I wonder if anyone here can help me. I have a home server setup made up of old secondhand computers, 2 servers running Windows Server 2003, 1 workstation running Windows 7, a 16 port switch & an adsl ethernet modem. All these connect and talk to each other fine but then I got a "Snap Server 18000" and a "Snap disk 30sa" sata array. When I turn the Snap on, it boots past the BIOS, runs a kernel, then displays: This device cannot be managed via the video/kbd/mouse interface. The video is now disabled. You may access the management functions from your web browser. Only, none of the other PCs detect it, so no browser can find it! I have checked all cables, and all LEDs indicate there's a connection. I have installed the windows "iscsi" and the adaptec "Snap Server Manager" on all PCs but still it's not detected. I don't know what else to do, please advise!

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• What does "link to unknown" mean?

  - by Question Overflow

  I just upgraded my server to Fedora 17 which made a switch of my bootloader from GRUB Legacy to GRUB2. There are two symbolic links in the /etc folder that points to the files grub.conf and grub.cfg in /boot/grub and /boot/grub2 respectively. Though the targets seem correct, the link icons are displaying an X status which seems to indicate that the links are broken. Upon right-clicking the property type, it states "link to unknown". The file size of the link corresponds exactly with the file size of the target file, so, why does the links appear to be broken? The image of the link icons: As requested, the following are the outputs from the commands: $ ls -l /etc/grub.conf lrwxrwxrwx. 1 root root 22 Jul 14 2011 /etc/grub.conf -> ../boot/grub/grub.conf $ ls -l /etc/grub2.cfg lrwxrwxrwx. 1 root root 22 Dec 10 18:57 /etc/grub2.cfg -> ../boot/grub2/grub.cfg

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• Gradually migrate from one SMTP server to another

  - by Bart van Wissen

  I maintain an application that sends out a ton of e-mail on a daily basis. Soon, we will have to migrate to another SMTP-server for that, which has an ip address that has no reputation with respect to email delivery. So instead of just flipping the switch, I would like to start by sending a small percentage of all mail through the new server, and then gradually increase that percentage until we reach 100%. It wouldn't be very hard to implement something in the application itself, but I would like to know if there is an easier, more reliable out-of-the-box-type solution for this. My first thought was to use round-robin DNS for this, but the servers require different credentials, use different protocols (one uses SASL, the other doesn't) and even different port numbers, so I think that rules out the DNS based solution. Is there any way, for example, to configure Postfix to send 1 out of x e-mails to relay host A and the rest to relay host B? Or perhaps a different MTA?

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• TvTuner as webcamera

  - by BarsMonster

  Hi, I have decent TVTuner which can capture both analog signal & HDMI. I am able to connect my camera and see output of it in realtime in VirtualDub. I want to be able to use it in Skype and other software which use webcams. The problem is that they only use first "videoinput" of my videodevice, but HDMI is 3rd, and there is no interface to switch (in Skype for example)... So could you suggest any "proxy" software which can take video from Tuner, and show as a webcam?

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• Two Network Adapters on Hyper-V Host - Best way to configure?

  - by GoNorthWest

  Hi, I have two physical network adapters installed in my Hyper-V host. I want one to be dedicated to the host, and the other to provide external network services to the VMs. Would the appropriate configuration be as such: Leave the first physical network adapter alone, assigning it the host IP, but not using it to create any Virtual Netorks For the second physical adapter, I would create an External Network, along with a Microsoft Virtual Switch, and use that to provide network services to the VMs. Each virtual NIC for the VM would be associated with that External Network. A static IP would be assigned to this adapter, and each VM would be assigned a static IP as well. The above seems reasonable to me, but I'm not sure if it's correct. Does anyone have any thoughts? Thanks! Mark

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• I need access control within the same network/VLAN

  - by Sadiq ali

  Hi, I have a single network/VLAN and I want to block some traffic and allow some traffic in my network, is this possible using a L2 or L3 switch? If so which switches support this feature and what would be the commands to configure this? I have already tried this using access lists by applying it to an ethernet port but if I apply it on one port it will automatically work on incoming traffic on that port but I mean it to work on only outgoing traffic as per my ACL. Do you have any suggestions please?

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• Can I config different VIP per service pointing same Real servers with Cisco ACE?

  - by Kamome

  I'm using Cisco ACE Module with Cisco Catalyst 6504. There are 2 real servers connected to Switch, and runs three different services. (TCP 82, 83 and 84) I have to use three different URLs per service. (for example, a.com for TCP 82, b.com for TCP 83 and c.com for TCP 84) Therefore, I need three IPs. The problem is, is it possible that configure 3 different VIPs with same real servers with Cisco ACE Module? I mean, if VIPs are 1.1.1.1, 2.2.2.2, 3.3.3.3 and real servers are 4.4.4.4, 5.5.5.5, can I configure as following : VIP 1.1.1.1:82 Real Server 4.4.4.4:82, 5.5.5.5:82 VIP 2.2.2.2:83 Real Server 4.4.4.4:83, 5.5.5.5:83 VIP 3.3.3.3:84 Real Server 4.4.4.4:84, 5.5.5.5:84 I think, logically, it's possible. But is it REALLy possible?

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• Computer can't boot

  - by zETO

  I have a 1 year old PC and the last weeks, when I press the ON button the PC doesn't power on ( Like I didn't press the ON button ). I have to plug and unplug a few times the power cord in order to make it work. At the start this happened once in 10 boots. Now it happens much more frequently to the point that when I press the power on button it never even opens if I don't do the cord switch thingy. Very rarely also, the PC shut downs for no reason and no warning, even when idle. The important fact to note here is, the green light on the motherboard is always on, even when the PC doesn't power on. What should I do? Is it a Power Supply failure or a motherboard? My power supply is a high end corsair model, AX850 and my motherboard a high end ASUS.

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