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  • is it possible to synchronize the states of TCP proxies in real time (for real-high-availability of SLB)?

    - by Song
    Consider that there are two server load balancers working in the tcp proxy mode (e.g., for L7 load balancing). Is it possible to synchronize their states in real time so that they can be a backup for each other? in case that one is down, the other still has all necessary states to uninterruptedly support all existing TCP connections. I understand that this is hard, but I am wondering whether any free/commercial LB already supports this feature. Thank you!

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  • Can I change a user password in Linux from the command line with no interactivity?

    - by Paul Hoffman
    I have a specific use case where I would really like to be able to change a user's password with a single command with no interactivity. This is being done in a safe fashion (over SSH, and on a system with only one user able to be logged in), so it's fine to expose the new password (and even the old one, if necessary) on the command line. FWIW, it's a Ubuntu system. I just want to avoid having to add something Expect-like to this system for just this one task.

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  • Best way to "clone" my Windows Server 2008 R2?

    - by A.B. User
    I have a Windows Server 2008 R2 Machine with 1 physical hard drive. I have an exact copy of the hardware of it, which I intend to use a a redundant backup in case my server fails (hardware or software). I'd like to routinely "clone" my production server's hard drive, so that when it fails, I'll just swap it with the latest clone. Is this even possible? If it is, what would be the simplest way to do this?

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  • How to close window/app when i cant see it? ubuntu

    - by tm1rbrt
    Im running ubuntu. I just tried to play supertux but my LCD didnt support the resolution and all i got was a blank screen and music playing. I tried to close it and go back to the desktop by pressing ctrl + z but that didnt work so i had to hard reset my computer! In future what should i press when this happens?

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  • "Boot Error" message when booting Ubuntu 9.10 from USB sticks (Occurs only on 1 PC)

    - by xeross
    Hey, Since today suddenly both my USB ubuntu installations (2 different USB sticks) try to boot and nothing loads but all I see is a message saying "Boot Error". When I press space it continues booting from the main hard drive. I tried reinstalling ubuntu on the USB stick but same error. This only happens on 1 computer and started happening today, before it worked just fine. Any idea what's causing this ? Regards, Xeross

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  • Can fully-qualified hostname be used as a unique identifier?

    - by xxbbcc
    If I get the fully qualified computer name on a Windows server (2K3 or 2K8) using the GetComputerNameEx() API call, can I rely on that name to be unique on that particular domain? That is, can I assume that only a single active physical or virtual machine will have that fully qualified name at a given time? As a second question: is it guaranteed that all Windows machines will have such a fully-qualified name? Thanks for any help.

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  • Restrict print copies on a PDF

    - by Chops
    We have a very specific use case for an application we're developing, where a user will be presented with a PDF document, which they can print off. However, we need to be able to restrict the PDF so it can only be printed off once. Does anyone know if there's a way to restrict the number of times a PDF can be printed. I'm aware the PDF spec has lots of security features, but I've not found reference to anything like this before. Many thank.

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  • More RAM vs. more servers

    - by user357972
    I was recently asked "Do you know when to decide between going for more RAM or more servers?" (in the context of scaling data mining applications). I had no idea, so what are some ways to decide? I have very little knowledge of architecture and scaling (my understanding of computer memory and what a server does is limited to the high-level basics), so tips on learning more about these things in general are also very welcome.

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  • How to troubleshoot port forwarding on Windows 7 (64 Bit) with ICS enabled?

    - by LearnCocos2D
    I want to forward some ports (1666 for perforce, 8081 for Hudson) on my Internet Gateway machine. This machine is running Windows 7 (64 Bit, legal, user-account) and connected to the Internet via cable modem (it's not a router). The Windows machine is sharing its Internet Connection via ICS and that works fine on all connected computers. I can access the services via the gateway's public IP (95.x.x.x) on the given ports if they are running on the gateway machine itself. I've added the ports and destination IP address (192.168.0.18) in the Internet network adapter's Advanced Settings dialog (Sharing tab). That's the same dialog where you have a list of preconfigured services like HTTP, FTP and other incoming services. When I do that I can't connect to the services anymore. For some reason port forwarding isn't working. I have uninstalled Bitdefender because I wanted to check if the Firewall interferes. I've also disabled the Windows Firewall and Defender to no avail. I tried a freeware tool that helps to setup port forwarding but that didn't work either. The target machine is a Mac OS X computer whose Firewall is disabled. The IP is static. I can successfully connect to the services using the local IP address (192.168.0.18) from two different machines, including the gateway computer. So internally and externally it seems to me that the ports are open and not blocked, and the issue is with port forwarding itself. From what I understand it should be enough to add an entry to the Advanced Settings dialog to enable port forwarding when there are no firewalls interfering. How can I troubleshoot why port forwarding isn't working for me? What steps should I follow to alleviate the issue? PS: I gladly accept command line solutions. Other things I've tried: adding an Inbound Rule to Windows Firewall for the 1666, 8081 ports trying with Windows Firewall enabled and disabled disabling/enabling the network adapter double-checked that the IP addresses are correct mapping a different incoming port to the service's actual port followed or checked the misc tips in this article What I haven't dared trying yet (let me know if it's worth a shot): disable/enable ICS remove all network adapters (via Control Panel), then re-install and re-configure them

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  • Access Virtual PC Website from Host Browser

    - by rams
    I have Virtual PC 2007 running Windows XP. I can access a website setup on the Virtual machine from a browser in the Virtual machine. How do I setup the virtual machine so I can access the website from a browser on the host machine. The host machine is also running WinXP. Both host and virtual machine can ping each other via IP and computer name. TIA rams

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  • Server access through switch port

    - by Kblz Btz
    I am using wireshark to monitor traffic on a server - Problem is, the computer I am using is only a terminal wired through the switch. Main line comes into the server which is relayed to multi-port switch (roughly 50 connections). Right now I get a lot of server communication between my it and my terminal but shows no information for other terminals. Can wireshark be configured to monitor ALL traffic in this environment?

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  • Wampserver not working in Windows 8

    - by user1873067
    I recently upgraded my Windows 7 to Windows 8 successfully. Other application are working perfectly except wampserver. When I double click on the desk top icon, it shows red on the tray bar and then the color changes but when I click Start All Services, nothing happens. Localhost does not open in webbrowser. Skype is not running on my computer, i don't know if there is other application using the same port in Win8. Please help!

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  • Installing Windows 8 on SSD

    - by StoneFX
    I'm trying to install Windows 8 (CP) on a 2nd SSD that I have (the 1st SSD has Windows 7). I boot into the installation from a usb stick, select the SSD, and launch the installation. When the computer goes to reboot during the install process, it keeps going back into the usb stick or my Windows 7 installation. It never recognizes the installation on the 2nd SSD. Is there something I'm doing wrong?

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  • Test a microphone with an intermittent fault

    - by Mick
    I have a microphone with all the software set up correctly, but there is a loose connection somewhere. I'd like some software to give me instant feedback on whether the computer is picking up the sound of my voice so that I can wiggle some wires and work out where the fault is. Any suggestions?

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  • Installing Windows 8 on vmware 6.5

    - by Aditya
    Is there any way to install Windows 8 on a VMWare Workstation 6.5. I can't install it, get this message: The installation failed with this error "vcpu-0:NOT_IMPLEMENTED vmcore/vmm/intr/apic.c I found this link http://www.sharepointsolutioncenter.net/Blog/Lists/Posts/Post.aspx?ID=46 It says don't try it but just in case anyone has done it please tell. I don't want to download vmware workstation 8 or 9

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  • What kind of scaling method is it, when you add new software to a single server to handle more users? [on hold]

    - by Phil
    I have read about scaling (in terms of terminology and methods). This got me confused about the following: On a single computer, running a web server (say apache), if the system administrator adds a front, caching, reverse-proxy such as Varnish, which in that scenario increase the amount of requests this server is able to handle. My question: Setting up such cache increases the capacity of the server to handle work, hence scales it, but without increasing neither the amount of nodes or the node's capacity. What is the name for this type of scaling?

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  • Running a PC with Windows 7 as an Appliance

    - by Steve
    What options are available for running Windows 7 as an appliance and is there an official Microsoft program to get involved in? I would like to run the computer as a box that boots, displays no bios or boot information, then moves immediately to run one program full-screen without allowing the user to interact. It seems like there should be some base configurations that allow this or a special version of Windows that is configured to minimize extraneous display and control.

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  • How to delete old-school program from windows7?

    - by scythargon
    I just installed Ext2 Installable File System 1.11a, it creates new drive in "My computer" like link to my ext3 partition but further it does not work for me - an error appears when I try to access this drive (this program actually not for Windows 7) and now I want to remove it, but there is no appropriate menu entry in "Remove programms" window. And no folder in "Program files" So, how to remove it?

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  • No mail for root message [closed]

    - by Werulz
    I want to receive email when people login to my server via ssh (as a security measure), however, when I login, I get: No mail for root Email is [email protected] Does it need Postfix to work? I already install it on server but i haven't configured it Can you give me a tutorial to configure Postfix in case it needed? Will email be sent even if my domain hasn't been propagated yet? I added this in .bash_profile echo 'ALERT - Root Shell Access on:' `date` `who` | mail -s "Alert: Root Access from `who | awk '{print $6}'`" [email protected]

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  • Mouse curser gets "weird" when I move it between different monitors

    - by Markus
    I'm using a Windows 7 64-bit machine with two monitors side by side. Sometimes when I have a fullsreen application running on my main monitor and I am moving the mouse curser between the two monitors, the curser gets corrupted. You cannot see that it is a curser anymore. To fix it I have to restart the computer. Has anyone heard about this problem before? How do I fix it without rebooting?

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  • No external network on ubuntu 9.10, though dns works..

    - by user29368
    Hi, I have a weird problem I cant solve. I have several computers, two with xubuntu 9.10 One of them, acting as a media server, has stopped to work when it comes to external network.. I can do for example: ping google.com Which gives me an ip adress back, like: name@Media:/etc$ ping google.com PING google.com (66.102.9.147) 56(84) bytes of data. That tells me it reaches the dns?, but I get no response at all... If I ping a local computer all works fine. I can also reach the computer via ssh without any problems. I have always used network manager, but now I uninstalled it and made the settings manually like this: /etc/network/interfaces auto lo iface lo inet loopback auto eth0 iface eth0 inet static address 192.168.1.52 netmask 255.255.255.0 network 192.168.1.0 broadcast 192.168.1.255 gateway 192.168.1.1 Still no luck. I have no specific settings for this one in my router, and all the other computers, including my win laptop works fine. This is very annoying since I cant even do an update or anything.. ifconfig looks like this: eth0 Link encap:Ethernet HWaddr 00:24:1d:9f:10:89 inet addr:192.168.1.52 Bcast:192.168.1.255 Mask:255.255.255.0 inet6 addr: fe80::224:1dff:fe9f:1089/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:15410 errors:0 dropped:0 overruns:0 frame:0 TX packets:2693 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:1167398 (1.1 MB) TX bytes:694973 (694.9 KB) Interrupt:27 Base address:0xe000 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:2150 errors:0 dropped:0 overruns:0 frame:0 TX packets:2150 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:143456 (143.4 KB) TX bytes:143456 (143.4 KB) route -n like this Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0 0 eth0 0.0.0.0 192.168.1.1 0.0.0.0 UG 100 0 0 eth0 I do not know where the adress starting with 169.254 comes from.. Could that be a part of the problem? Hoping for some assistance since Im totally stuck here.. /george

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