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• BSOD / Reboot Cycling (possibly after windows update?)

  - by Mikey.B

  Windows XP SP3 Hi Guys, My desktop PC rebooted during the night (presumably due to an automated Windows update) and was stuck on a file system check. I forced a reboot as it had been stuck for hours and now the system won't finish booting. It shows the Windows XP splash screen, briefly flickers what looks to be a BSOD, and then reboots. So far, I've tried: Booting into all variations of safe mode (just hangs) Setting BIOS settings to fail-safe defaults (still reboots) Choosing the start-up option to load last known good configuration (still reboots) Any suggestions on how to proceed here? I haven't installed any recent software or hardware so I don't think this is a result of any explicit change I've made. -M

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• Red Hat 6.5- sysctl -w net.ipv6.conf.default.accept_redirects=0

  - by kjbradley

  I am in the process of writing a Red Hat 6.5 Kickstart disc with hardened security. I have run a program to determine where the weaknesses are in my system, and apparently there is a medium severity problem by accepting IPV6 redirects. When I implement the following line in my post script in my kickstart, I can't access any websites externally with wget, or ssh/scp in from my computer. sysctl -w net.ipv6.conf.default.accept_redirects=0 Is there a workaround to this so that the system will still be hardened but I will be able to access systems that are external?

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• Windows 7 64 bit will hesitate and the screen will go black

  - by jondrnek

  I am running windows 7 64 bit with 2 monitors. Several time a day the system will freeze up for about 5 seconds and the screens will go black. After the 5 seconds are up, the system continues to function properly. I get no error messages that pop up and all the applications I am running handle it fine. All the devices appear fine, my drivers are up to date and nothing is jumping out at me in event viewer. What are the next troubleshooting steps I can take?

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• Deny IIS6 web request based on URL parameters?

  - by user21146

  I've got a legacy app running a third-party ecommerce system under IIS6. Some spammers recently discovered a bad security vulnerability in one of the store's forms, which are allowing them to send arbitrary emails from our system. Unfortunately, this store "feature" is built into the default.aspx page's code-behind and I have no way to disable it without shutting down the store. How can I filter out URL request with a given querystring parameter? ie, I want to filter out requests to: http://www.mysite.com/store/?id=SendSpam based on the "SendSpam" string.

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• Any reviews about the Amazon Elastic Compute Cloud (Amazon EC2)?

  - by hkshambesh

  I want to use it for hosting large system which will contain x-large database.

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• How to solve the "Bootmgr is missing" problem on Windows 7 machine ?

  - by Purushotham

  Hi, I bought a Dell Laptop recently which has Windows 7 operating system in it. I did not get the operating system CD/DVD. Recently I got a problem while starting the machine. I really don't know what happened. It says "Bootmgr is missing. Press Alt+Ctrl+Delete to restart". I have Dell recovery CD. But I don't know how to resolve this issue. Can anyone help me ?

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• Mac OS X Server 10.6.6 "disables" CPU in VMware Fusion [closed]

  - by wjlafrance

  Hello! I installed Mac OS X Server 10.6.0 in VMWare Fusion the other night and it worked perfectly, until I ran Software Update. I upgraded to 10.6.6 through the combo updater, and now when I start the VM it says: "The CPU has been disabled by the guest operating system. You will need to power off or reset the virtual machine at this point." I've switched the operating system in the options to OS X Server 32bit, 64bit, and even to Windows 7, and nothing has worked. Does anyone have any ideas?

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• BIOS recognizes HD, but Ubuntu doesn't recognize it as partition

  - by user23792

  Hello, I just stuck in a new 64 GB SSD (literally out of the box) into my Lenovo X61 laptop, replacing an old 5400 RPM 80 GB drive. When I boot the system, my motherboard successfully sees the SATA hard drive. Now I want to install Ubuntu on it. I stick it in the CD drive, bootup the system, and it gets to step 4 (choose partition), but sees no available partitions. Do I need to do something to the hard drive before installing Ubuntu? Many thanks.

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• UID /GID with NFS and ZFS

  - by profy

  Hi, I have a server with a zfs file system (nexenta core), and I'm sharing files overs nfs with zfs share share_nfs. When I mount the file system on my client (a ubuntu workstation) I can't have the original UID/GID :( I mount my client with the following options : 192.168.1.4:/home /media/testnfs nfs rw,dev,noexec,nosuid,auto,nouser,noatime,rsize=8192,wsize=8192 0 0 If I configure idmapd I have nobody:nogroup and without idmapd I have 4294967294:4294967294, how can I get the original ID's ? Is it a problem with the nfs server or the client ? Thanks for answers.

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• How to make a Windows 8 clean install without prior Windows installation or key?

  - by fmsf

  I've been a Mac user for ages and I don't have any copy of Windows (xp, vista or 7). So I need to make a clean install on my custom built pc currently running Linux. I have found some information regarding the existence of a "Windows 8 pro system builder" which will allow clean installs in blank disks without any pre-requisites for prior Windows versions, but all information is very vague and without references. Does anyone know how to do this kind of installation? Where can I buy the Windows 8 system builder?

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• Is is possible to slipstream DotNet 4 into Windows XP ?

  - by user43300

  I tried to use nLite but this program is no longer updated. And it seems it has no capability of dealing with dotNet. On my instalation CD there is DOTNETFX folder with version 1.1, but it seems even this old version is not installed with system. I also read somewhere that it is possible to download dotNet as system update, that is a file with name that begins wih KB.... , so that file could be properly digested by nLite ? Any help in this matter ?

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• In a virtual machine monitor such as VMware’s ESXi Server, how are shadow page tables implemented?

  - by ali01

  My understanding is that VMMs such as VMware's ESXi Server maintain shadow page tables to map virtual page addresses of guest operating systems directly to machine (hardware) addresses. I've been told that shadow page tables are then used directly by the processor's paging hardware to allow memory access in the VM to execute without translation overhead. I would like to understand a bit more about how the shadow page table mechanism works in a VMM. Is my high level understanding above correct? What kind of data structures are used in the implementation of shadow page tables? What is the flow of control from the guest operating system all the way to the hardware? How are memory access translations made for a guest operating system before its shadow page table is populated? How is page sharing supported? Short of straight up reading the source code of an open source VMM, what resources can I look into to learn more about hardware virtualization?

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• Keyboard/Mouse not working when windows vista has reached login screen

  - by Jonas

  I currently have a problem with a system (vista home premium, 64bit). USB kbd/mouse will not work when windows has booted/loaded their drivers and Im stuck at the login screen with no working input devices. None of the available boot options after F8 will boot to working kbd/mouse. They work in the bios setup and they seem powered all the way until a few seconds before the login screen. Legacy USB devices is also enabled in the bios. They also work with the recovery dvd, but I am unable to start the device manager to check or uninstall the mouse/kbd drivers. Cant get devmgmt.msc nor devmgr.dll (with rundll32) to work. System repair does not detect the problem and there are no available restore points (it was disabled). Any ideas?

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• Motherboard dual gfx power question

  - by user33931

  1st, I am software guy. I do not do hardware. So I know to you hardware geeks, this is a dumb question. I just inherited a box with a ASUS P5GZ-MX mother board. I have attempted to install two nVidia PCI video cards. I put a 750w power supply in the system to be sure I have enough power. With no extra video cards, the 3.3 v shows normal. When I put one card in, the 3.3 goes to 3.5-3.6 and flashes red (over voltage) about 30% of the time. When I put the 2nd card in, it goes to 3.73 v and stays red all the time. Any Ideas why the voltage goes up when I add cards instead of going down? More Importantly, is this dangerous to the system?

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• External disk not working with Mac OS X 10.5

  - by ctx2002

  Hi: My OS is 10.5.7. I have an external hard disk, formatted as Mac OS Extended (Journaled), connected to my Mac machine through USB cable. I have used it for a while, but now it is not working. Error showed in /var/log/system.log. USBF: 2521.384 AppleUSBEHCI[0xa515800]::Found a transaction which hasn't moved in 5 seconds on bus 0xfd, timing out! (Addr: 0, EP: 0) ..... ...... kernel[0]: USBF: 2588.616 [0xa6baa00] The IOUSBFamily was not able to enumerate a device. Luckily, in my work place there is a Mac with OS 10.4, so I had plugged the disk into the 10.4 machine and it worked!!! I did checked "System Profiler" on both machines (10.5, 10.4). Under usb section, for 10.5 it shows USBEHCI, under 10.4, it shows USBOHCI. I am not a expert on USB Device , can any one tell me why 10.5 cause the problem. it was worked under 10.5

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• How to removeTrojan PB [duplicate]

  - by user266901

  This question already has an answer here: How do I get rid of malicious spyware, malware, viruses or rootkits from my PC? 15 answers How to remove trojan PB from windows 7 system? previously i had installed Norton 360 antivirus. the subscription was expired two months back. Recently i have purchased quick heal total security. while installing quick heal antivirus i get the message 'system infected by Trojan PB' Their is an option to remove Trojan PB by restarting computer. However the infection does not get removed. Please advice for removal of Trojan PB

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• Clarification of the difference between PCI memory addressing and I/O addressing?

  - by KevinM

  Could someone please clarify the difference between memory and I/O addresses on the PCI/PCIe bus? I understand that I/O addresses are 32-bit, limited to the range 0 to 4GB, and do not map onto system memory (RAM), and that memory addresses are either 32-bit or 64-bit. I get the impression that memory addressing must map onto available RAM, is this true? That if a PCI device wishes to transfer data to a memory address, that address must exist in actual system RAM (and is allocated during PCI configuration) and not virtual memory. So if a PCI device only needs to transfer a small amount of data at a time, where there is no advantage to putting it into RAM or using DMA, then I/O addressing is fine (e.g. a parallel port implemented on a PCI card). And why do I keep reading that PCI/PCIe I/O addressing is being deprecated in favour of memory addressing? Thanks!

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• Boot Camp from USB DVD drive

  - by user81951

  I can't seem to be able to install Windows 7 64-bit on a 2008 MacBook (64-bit dual core) from an external USB DVD drive. I've done the following: Performed a clean install of Mac OS X Snow Leopard Installed all system updates Run Boot Camp Assistant - when the system restarts I get an error stating "no bootable disc" Used rEFIt, but I still get the same error Made a bootable USB drive from an ISO of the Windows 7 installation disc, but I still get the same error Tried using Windows 7 32-bit, Windows 7 64-bit and Windows XP, but I still get the same error How I can resolve this?

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• Why would an ext3 filsystem be rolled back on a Debian VM running in VirtualBox after loss of power to the host

  - by Sevas

  A Debian Virtual machine runs as a Guest VirtualBox VM. It's filesystem is EXT3. The host system loses power and after booting up the host system and guest VM, I find that the VM's filesystem has been rolled back to a previous state, losing changes made to the filesystem some time before losing power. The operations that were rolled back had been fully completed before the loss of power (files fully copied, file handles closed, etc.), but it's possible and even likely that other write operations were occuring on the VM at the point of the crash. So I am trying to figure out if it's the filesystem recovery process that rolls back filesystem operations after encountering corruption post power loss, or is it possibly related to VirtualBox and the way it ignores flush requests for performance gains by default (discussed here) Are there any other factors that would result in the filesystem being rolled back after losing power?

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• Tricking Linux apps about current time with environment variables

  - by geek

  Sometimes it is possible to trick a Linux app by calling it like this: HOME=/tmp/foo myapp This would make myapp think /tmp/foo is the home directory, it won't try to get the user id, find its home directory via getpwent(). This is useful when myapp must be forced to dump some of its config files into a non-standard location different than ~. A similar trick can be done like this: LANG=foo LC_ALL=bar myapp This is useful when myapp needs to be called once with a different locale without having to make the change persistent by using the export bash built-in or even modify stuff in /etc/profile. Is it possible to pull the same trick with time and date? The goal is to make an app use another time than the system ones. The final goal - to make timestamps that appear in logs/commit messages not being tied to the system time.

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• Running Ubuntu off a USB drive?

  - by Solignis

  I was wondering if a USB 2.0 Thumb drive has enough bandwidth to act as a primary system drive in an Ubuntu Linux server. More specifically an SAN server. I am running an iSCSI target, ZFS and NFS-kernel-server, BIND9 (Slave), and Openldap (Slave). I was thinking of resorting to a thumb drive because my new motherboard only has 4 SATA ports and I have 5 disks. 4 (ZFS Pool) 1 (System). And unless I get an expansion card there is no way to get more SATA ports. This "server" leans more twords a home server. I use in my lab with my VMware server. It provides storage, or atleast it did until it died. Would it still be better to go with the SATA hard disk?

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• Remotely initiate windows updates

  - by TetraFlash

  I have a network with countless workstations on it and the windows updates are done through WSUS in push cycles to allow us to use a generic image and configuration and avoid network congestion. I have a number of workstations in storage that are connected once a month for a few days to recieve updates, however not all of them fall within their push cycle. I want to avoid going to each machine and clicking "check updates" as that would require me to connect a monitor, mouse and keyboard. Is there a way (preferably through powershell but im open minded) to initiate a check and install of updates on a remote system? Lets say for 1 system at a time right now, I can add a file reader and a look later. NOTE: the configuration of the WSUS server is above my pay grade, im simply being asked to ensure these machines are updated. Thanks for any help or hints

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• How to prevent boot manager missing after cloning a win764 image using Ghost 2003?

  - by hirogen

  I am running ghost 2003 command -fdsp, but once we have cloned the image and restored it onto exactly the same make and model machine, we are force to run win7 setup and run a repair which fixes the boot menu, I want to prevent this requirement to fix the problem, any suggestions besides the obvious of using Windows AIK tools, new versions of ghost/clonzilla. I want to prevent the problem in the first place, it's 1 partition only, on a levano workstation m82 with UEFI and a 100mb system reserved partition. Windows Boot Manager screen and states: Windows failed to start. A recent hardware or software change might be the cause. To fix the problem: 1.Insert your Windows installation disc and restart your computer. 2.Choose your language settings, and then click "Next." 3.Click "Repair you computer." If you do not have this disc, contact your system administrator or computer manufacturer for assistance. Status: 0xc000000e

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• solutions for a webserver dedicated to manage permissions/ACL and (reverse) proxying API servers?

  - by giohappy

  I'm considering various layouts to expose various HTTP API services (running on their own differents servers) through a frontend server dedicated to manage permissions on behalf of the API services. I've considered various options, from the classical ones like Nginx, Apache, etc. to HAProxy, passing by the various Python webserver solutions like Tornado, Twisted (which gives me the opportunity to implement my own ACL system easily). The foundamental feature is high performance and scalability, and the ability to manage fine grained ACL rules (similar to the HAProxy ACL system) I would like to know what is a suggested approach to setup what I need, and if (opne source) ready-to-use solutions are already available dedicated to this.

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• What do BCU.exe and BCUService actually do?

  - by ChrisF

  I've got a Gigabyte G32M-ES2L motherboard with an Intel Core 2 Duo E7500 2.93GHz CPU running Windows XP SP3 (fully up to date). Today when I booted the machine my firewall (Sygate Personal Firewall) warned me that BCUService.exe wanted to make a call out to the internet. Wondering what they were I did a Google search and while I found out that these programs weren't malware, I didn't find out what they actually do. The information seemed to boil down to: Part of Browser Configuration Utility Auto-recovery Service from DeviceVM, Inc. This program is not important for your system process, but should not be terminated unless suspected to be causing problems. Source So before I remove them from my system does anyone know what they actually do and its it worth them taking over 4Mb of memory?

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