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• How to set up strongswan or openswan for pure IPSEC with iPhone client?

  - by Shabbyrobe

  I'm having trouble finding concrete, up-to-date information for how to set up strongswan or openswan to be used by the iphone's VPN client. My server is behind a budget linksys NAT router. I found this, but it mentions a whole bunch of .pem files with no reference for how to create them. Unfortunately, the "fine" manuals for both packages were quite inscrutable and unfriendly to a novice. I've set up OpenVPN before and managed to get serviceable results very quickly, but after a day and a half of reading out of date docs, I barely even know where to start. Any help would be greatly appreciated!

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• How to troubleshoot Application Popup issues 0XC0000142 and 0XC000009a

  - by DotDot

  I am running randomly into 1 of these popups when our application runs. The machines range from 8GB/8Core to 24GB/24Core and run Windows Server 2008 R2. The application is a bunch of perl scripts and exe's that are expected to utilitize the server well. The process tree can be quite deep (5-6 child levels) and quite broad (60-70 level 1 processes). We hit this issues every 1% run on random machines. The application stalls on popup, unless someone clicks the damn button. The event log reads as cmd.exe - "Failed to initialize app. Click OK to close app" How could I reliably repro these issues?

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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 point subdomain to a nameserver?

  - by vonconrad

  I've got an old crusty WHM/cPanel server which I'm trying to get rid of. I've got a new setup on shared hosting which is much cheaper in the long run. The problem is that there are a bunch of websites on the server whose domains I don't have access to. They're currently pointing to name servers of my domain (ns.mydomain.com), but the new provider has their own name servers (ns.provider.com) which I have to use instead. My initial idea was to set up a CNAME to point my name server to my provider's: ns.mydomain.com CNAME ns.provider.com, but I read in this question that this would be a bad idea. The accepted answer suggests using an A record instead, and I want to make sure how this would work. Assuming ns.provider.com has an IP address of 123.123.123.123, is it just a matter of doing ns.mydomain.com A 123.123.123.123? Is there any way the provider could block those requests as the name server domain technically doesn't belong to them?

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• Cent OS upgrade PHP

  - by greggory.hz

  I'm in the midst of resolving a bunch of security issues on a clients server to get them compliant with credit card laws and such. The first order of business is getting php from 5.2.14 to 5.2.16. When I run yum update php, this is the output I get: Excluding Packages from CentOS-5 - Addons Finished Excluding Packages from CentOS-5 - Base Finished Excluding Packages from CentOS-5 - Extras Finished Excluding Packages from CentOS-5 - Updates Finished Setting up Update Process No Packages marked for Update I'm fairly new to CentOS, but with Debian/Ubuntu, you can add PPAs to allow new software packages. Is there something similar for CentOS? This output makes it look like it's ignoring all the main package repos as well.

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• Set an Excel cell's color based on multiple other cells' colors

  - by Lord Torgamus

  I have an Excel 2007 spreadsheet for a list of products and a bunch of factors to rate each one on, and I'm using Conditional Formatting to set the color of the cells in the individual attribute columns. It looks something like this: I want to fill in the rating column for each item with a color, based on the color ratings of its individual attributes. Examples of ways to determine this: the color of the category in which the item scored worst the statistical mode of the category colors the average of the category ratings, where each color is assigned a numerical value How can I implement any or all of the above rules? (I'm really just asking for a quick overview of the relevant Excel feature; I don't need step-by-step instructions for each rule.)

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• Web Content Filtering for Windows Clients

  - by djoyce

  I'm working with a small business to solve a bunch of problems. One is their Windows 7 POS registers need to have web access restricted to only three remote support sites, but the back office machine needs an unfiltered connection. I'd like something I can install and configure on the few registers to block all but those few sites. In a perfect world this would restrict the normal register user, but the admin user would not be filtered. Free is best, if it works, but a small fee would be alright too. Microsoft's Family Safety filter is close, but requires a Windows Live account, which isn't ideal, but may be alright. Anyone use this in a small business environment? I'd prefer something easily managed at the local machines. K9 Web Protection is interesting and I'm going to look into it more. Are there other options? Seems like someone would have made something simple like this as an open source project, but maybe not.

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• Windows Software to Save Arbitrary Application State

  - by ashes999

  VM software does a great job of saving state when you "turn it off," allowing instant and immediate return to that previous state. Is there some application for Windows that allows me to do the same thing, for any arbitrary software? It would allow me to save/restore state, possibly via a shell command or button that it appends to every window. Edit: For clarity, there are two types of apps: those that save their own states, and those that save others' states. Those that save their own state are like Chrome, which on load, reloads the windows you had open last time. That's not what I'm asking about; I'm asking for an app that can save the state of other apps, kind of like VM software does; but for any app. (A trivial test would be load notepad++, type a bunch of stuff, and save-state; on reset-state, you should be able to multi-level undo a lot of what you wrote, as if you never shut down the application.)

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• Restart an in-use NFS server without interruption (within timeout)

  - by zebediah49

  I have a bunch of compute clients working on jobs, saving output data to a NAS machine. All machines are centos 6.2. They mount it via automount NFS, with a timeout of 1200 (default config). The NAS machine needs to be restarted. If I can restart the machine within that 1200s (20 minute) window, will the clients just block on IO until it comes back up? A minor interruption (pause) in service is ok, as long as it doesn't cause the running processes to error out. If necessary I could loop through and SIGSTOP all job processes, restart and resume them -- I just don't want to break the open file handles. How can I run a restart like this without killing processes with open files?

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• How do I know if I need a layer 3 switch?

  - by eekmeter

  We currently have a flat network with a bunch of unmanaged switches. I would like to use VLANs to segregate certain users like guests and I would like to use 802.1x. However, I'm not sure if what I need is a layer 3 or a level 2 switch. From what I understand a layer 3 switch does routing between VLANs. I don't think I need this at the moment but as I said I'm not sure since this is all new to me. What else would a layer 3 switch do for me? Our network is relatively small, less than a 100 users. What exactly does a layer 3 switch do that I can't get with a layer 2 switch? When would I need a layer 3?

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• How to remove program shortcuts on the desktop in window in Windows 7

  - by wdkrnls

  I have a bunch of "Shortcut" icons on my Windows desktop folder which don't appear as .lnk files in the powershell view of C:/users/ME/Desktop nor in fact do they show up at all. They do show up in the file manager, however, and right clicking the "Shortcut" and selecting Properties reveals that they refer directly to the corresponding applications in my C:/Program Files/ directory. How can I prevent them from being displayed on the desktop (or in Windows Explorer) without uninstalling them? I tried selecting them and deleting them, but Windows prompted me for administrator permissions to delete the programs themselves, and not the shortcuts.

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• What are these completely random images that pop up when using Recuva?

  - by Qubert

  I just used Recuva to get back some photos I accidentally deleted on C:, but I also noticed there's a bunch of COMPLETELY random images in the list of recoverable files I can choose from. An example would be, There are images with names like John_Doe.jpg with a file path somewhere out of C:/Windows/Assembly/ And some of these things don't even make sense, there's one called componentsSpriteImage with the path C:/?/Images that shows a "poster" from the TV series Gold Rush. I am completely lost on this.. I know the OS is on C:, but I can't really think of a reason why Microsoft would leave a image hanging around from Gold Rush.

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• Make Ms Word activate window of file if it is already open when I double click the file's icon?

  - by barlop

  When I try to open a word document that is already open, I want it to just activate the window where the file is open. How can I do that? sometimes it takes time to check if an ms word document is already open, I don't to have to have to check through a bunch of open word documents to see if it's in there or not, I just want to double click the icon of a word document, and if it's open then go to it, if not then open it. With the doc/docx or shortcut to the doc/docx , I have some files where when I double click , it activates it when already open. I have other files where double clicking will bring up a "file in use" dialog box. I can't find what is the cause. I want it to always activate the window rather than reopen it. update- maybe that is default behaviour to activate when already open, and after a crash I had that stopped. i'll try deleting the working files and starting ms word again, idea from here

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• Bootstrapped Ubuntu 12.04 EC2 instance. Where to find log?

  - by nocode

  So I bootstrapped a shell script to install and run a bunch of tasks. Looks like the it ran for the most part, but I added one part and that was formatting an extra EBS volume. Pretty straightforward: mkfs.ext4 /dev/xvdf mkdir –m 000 /vol01 echo “/dev/xvdf /vol01 auto noatime 0 0” | sudo tee –a /etc/fstab sudo mount /vol01 I was able to install MongoDB, NGINX and Forever. I selected to use /dev/xdvf in the AWS console and see it. The 3rd line is not in fstab either. I've searched through various logs in /var/log/ but I don't really see much indicating the execution of the bootstrap. Logs that I see and looked through: auth.log boot.log dmesg dpkg.log syslog udev

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• How do I know if I need a level 3 switch?

  - by eekmeter

  We currently have a flat network with a bunch of unmanaged switches. I would like to use VLANs to segregate certain users like guests and I would like to use 802.1x. However, I'm not sure if what I need is a level 3 or a level 2 switch. From what I understand a level 3 switch does routing between VLANs. I don't think I need this at the moment but as I said I'm not sure since this is all new to me. What else would a level 3 switch do for me? Our network is relatively small, less than a 100 users. What exactly does a level 3 switch do that I can't get with a level 2 switch? When would I need a level 3?

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• How to batch edit a list of files?

  - by user43144

  I have a list of files where I need to remove some lines that have been added yesterday by a spambot. The section I want to remove looks like this: ^M <script>[...] bunch of malware code [...]</script> That section seems to have been appended to the files, so I can be relatively sure it's the last lines of each file that contain this part. Now I know a bit of Linux, but not enough to do this via a command. How would I go about and do this?

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• Kernel Compiling from Vanilla to several machines

  - by Linux Pwns Mac

  When compiling kernels for machines is there a safe or correct way to create a template for say servers? I work with a lot of RHEL servers and want to compile them with GRSEC. However, I do not wish to always rebuild off of the .config for each machine and go in and remove a bunch of unrelated modules like wireless, bluetooth, ect... which you typically do not need in servers. I want to create a template .config that can be used on any machine, but is there a safe way to do that when hardware changes? I know with Linux, at least from my experience, you can cross jump hardware way easier then Windows/OSX. I assume that as long as I leave MOST of all the main hardware modules/CPU in that this could create a .config that would work for all or just about any machine?

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• X11 not sending windows to remote computer matlab

  - by MZimmerman6

  I am trying to set up my home desktop, running OS X Mountain Lion, to basically do a bunch of grunt work for me remotely. I have set up ssh, and am able to remotely control the computer fine, but the issue comes in when I try to run X11 apps, like MATLAB, remotely and get windows to pop up. Every time I try to bring up a new window it either opens that window on the remote computer (not the one I am using to control it), or it tells me it can't find a display. here is how I am setting up my ssh assume my matlab alias is set up properly, which it is. ssh -X [email protected] matlab -nodesktop figure; This will open the window on the computer I am SSHing into, and not on the remote one. Basically I want that window to open on the computer I am remoting from. I changed my SSH X11Forwarding and stuff to be yes in ssh_config and sshd_config. Any other suggestions?

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• Ubuntu stops auto-mounting flash drive

  - by Brian

  It seems that after being up for a few days, my Ubuntu system refuses to auto-mount hot-plugged USB disks (i.e. flash drives). The output from dmesg shows that the kernel recognizes the device correctly. The only solution I'm aware of at the moment is to reboot (logging out may work as well, but the impact is the same since I have a bunch of stuff open and it takes a few minutes to get everything situated after startup/login). I thought gvfs-fuse-daemon was the thing responsible for managing filesystems in userspace, but killing and restarting that doesn't help. Any other ideas?

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• Ubuntu Lucid (10.04) subpixel font rendering crashes Xorg

  - by user36066

  Hi everyone... I really don't know how to solve this on my own so I thought giving this site a chance. After upgrading to Lucid I ran into some problems. With some experimenting I came to a conclusion that if I enable subpixel smoothing on fonts the moment I start any other application not native to GTK+ (wine, openoffice, wxWidgets, ...) my X server crashes the same moment. At first this seemed like something went wrong during installation. To cut the long story short, after 3 clean installations and whole bunch of experimenting the same thing happens all over again. Strange thing is... if I configure any other font smoothing besides subpixel, everything works like it should. Any thoughs?

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• Windows XP crashes by GT610 driver (nv4_disp)

  - by undone

  I have a PC which was working fine but one day screen went dark and nothing was shown. I thought the problem is graphic card, so I replaced it with new one. I bought a new graphic card (GeForce 610) and installed it on my system. I formatted my hard-drive and installed a fresh Windows XpSp3 and its drivers. Everything was fine but after installing graphic card's driver, I got an error saying windows got stuck in an infinite loop and it couldn't get out (in nv4_disp). I uninstalled it and downloaded its last version and installed it. Unfortunately, I got the same error and windows restated! Here's my system: Pascal Motherboard PT880PRO Intel CPU Windows XPSp3 I searched this issue on the internet and I found bunch of suggestions (from cleaning hardware to installing latest version of its driver) but nothing help! Any help would be appreciated! Thanks.

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• Asus ux31e zenbook SSD non-standard / cant upgrade hdd?

  - by FstaRocka

  I bought a ux31e asus zenbook, and the drive crashed last week. I just cancelled an mSata ssd order because I fear asus has used a non standard ssd!!! what a bunch of crooks, ive lost all my respect for this company! Can anyone confirm what and why? My SSD model is xm11 128gb - it looks like a ram chip and only has two tongues with 12 and 6 pins respectively. The drive I was about to order mSata had 8 where mine had 6 - i never bothered counting the rest. This article seems to confirm! UX31 UX21 Zenbook Article "It looks like SSD uses a non-standard format"

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• Is virtual machine slower than the underlying physical machine?

  - by Michal Illich

  This question is quite general, but most specifically I'm interested in knowing if virtual machine running Ubuntu Enterprise Cloud will be any slower than the same physical machine without any virtualization. How much (1%, 5%, 10%)? Did anyone measure performance difference of web server or db server (virtual VS physical)? If it depends on configuration, let's imagine two quad core processors, 12 GB of memory and a bunch of SSD disks, running 64-bit ubuntu enterprise server. On top of that, just 1 virtual machine allowed to use all resources available.

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• Why is my /dev/random so slow when using dd?

  - by Mikey

  I am trying to semi-securely erase a bunch of hard drives. The following is working at 20-50Mb/s dd if=/dev/zero of=/dev/sda But dd if=/dev/random of=/dev/sda seems not to work. Also when I type dd if=/dev/random of=stdout It only gives me a few bytes regardless of what I pass it for bs= and count= Am I using /dev/random wrong? What other info should I look for to move this troubleshooting forward? Is there some other way to do this with a script or something like makeMyLifeEasy | dd if=stdin of=/dev/sda Or something like that...

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• Restoring VM's in Hyper-V from a (somewhat) failed VSS backup...

  - by DeliriumTremens

  I attempted to do a backup of our virtualization server when moving from Hyper-V 2008 to R2. I changed the registry settings to register Hyper-V VSS with Windows Server Backup, and sent the backup on it's way while I went on to other things. Apparently the VSS portion didn't back-up the VM's like I had hoped, and after updating Windows Server and Hyper-V to R2, I was unable to restore the VM's correctly. The backup completed and I have all of the files from before the update backed up, but is there any way to restore the VM's from the backup? The vhd's all seem to have old modified dates, and when bringing the machines up from these vhd's they have very old settings. I have found a bunch of avhd files (named according to GUID), but I'm not sure if I can create a VM with the old vhd and merge the snapshots with it.

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