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• How to do complex port forwarding (sort of)

  - by adnan kamili

  I have a very different situation. My laptop named A, another machine B(ip-172.16.28.3) with ssh server installed and i have an account on that machine, the third machine C(ip-172.16.24.3) is a proxy server. All the machines are within a LAN, but 1- Machine B can connect to A as well as C 2- Machine A i.e.my pc, it can only connect to B and not C Now to use internet, i do the following: ssh -X [email protected] Then i type firefox and i use the firefox of machine B with proxy setings as 172.16.24.3:3128 Instead of using firefox of B, i want to use my local firefox. Is there a way through which i can connect to C via B and use my local firefox for browsing

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• Battery backed write cache behavior upon disk change

  - by Halfgaar

  We use 3ware Inc 9650SE SATA-II RAID PCIe RAID controllers with battery backed write cache. Our spare hardware has the same controller. I was wondering; are these controllers smart enough not to sync the cache when the disks have been changed? For example, if I deploy one of those spare machines by putting in the disks of another machine and that spare machine still has pending writes, will it be smart enough not to perform those writes on the replaced array? Edit: my scenario is not really made clear, so let me give an example: server1 goes down because of power supply failure. I put the disks in server2 and start. I repair server1 I put the disks back from server2 in server1 (it's not relevant right now that in reality I would probably keep server2 running). If server1 doesn't have safeguards, it will write to the array, thinking it's simply powering up again, corrupting it.

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• Windows 2000 under Windows 7 Virtual PC not working correctly

  - by dave

  I have just moved my Windows 2000 Virtual PCs from Vista to Windows 7 Professional (64-bit). The machines work to a point but I have found some problems: drive mapping does not seem to work any more. I need this to exchange data. I do not need network access to the virtual PC so would rather leave it unconnected. the virtual PC would automatically shutdown the session and go to the login screen after a few minutes of inactivity. I tried installing the Virtual PC Integration Components but the install failed (one of the messages basically says it's XP+ only). Now I'm stuck in 640x480 mode with mouse capture. I have heard that you can install an older version of the Integration Components but this sounds a bit suspect. Does anyone have any ideas on how to get Windows2000 working with drive sharing on a Virtual PC?

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• Issues with DHCP over multiple subnets

  - by Dan Monego

  I have a cisco router configured to handle multiple subnets (10.1.10.n, 10.2.10.n, etc), and an ubuntu system serving DHCP to the computers served by the router. After a restart of the DHCP, the systems on the 10.1 subnet are fine, but neither the server or the computers configured on the other subnets can see the router at 10.2.10.1 (or 10.3.10.1, or 10.4.10.1). The router can see itself at 10.2.10.1, however. The change that caused this was restarting the server, so I'm approaching it assuming the configuration error is on that end. Is that the likely issue or is there a different problem that would prevent the machines on the 10.2.10 subnet from resolving DHCP?

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• How to find out the reason why a scheduled task hang?

  - by Graviton

  I have scheduled quite a number of tasks in my Windows 7, doing a variety of cron jobs on my machines. I am perfectly sure that these tasks, when run on their own, won't hang. But the problem is that, when I run them daily, over the course of several days and weeks and months, occasionally some of them will hang. So I am forced to kill the hanged task and rerun it--- and now it can run successfully! I want to fix this problem once and for all, and for that, I need to know why a scheduled task will hang, even when I run it separately, it won't. Anyway for me to find out the reason?

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• Sharing iTunes Library Between Mac & PC Via A NAS

  - by Franco

  Hi Everyone, I'd be really grateful if anyone can help me with this, I spent literally days trawling the net before I came across this site, which seems to have very knowledgable people! So, the problem is: For years I've had a couple of PCs and a NAS drive. I've been storing all my music on the NAS drive and then accessing the library on whichever PC I wanted to by pointing both PCs to the NAS drive iTunes files. The good thing is I can see all my playlists and song ratings etc. Now, I've just bought a Macbook Pro as well. And I want to be able to access the same music, song ratings etc on this machine. I've tried simply holding down option and navigating to the .itl files that my Windows machine created, but that doesn't work. Is there some way to use the same iTunes Library (apart from home sharing) on both machines? Thank you so much for reading this.

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• Deploying an application on a windows domain

  - by ALOToverflow

  I'm looking for different ways to deploy, execute and uninstall an application on all machines of a Windows domain. I've did some research on Group Policy Object (GPO) but I'm still looking for other ideas. As I said, I need to deploy the application, run it without the user having to click anything and letting him to control over the machine. Once it's finished running I need to uninstall it and never run it again. Can such things be done with a GPO? Are there any other possibilites on a Windows domain? Thank you

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• Symmetrix gatekeepers on Solaris 10

  - by Milner

  I have some Solaris machines that are connected to EMC Symmetrix for SAN storage. Apparently the Symm has a gatekeeper device that is used with the symmetrix CLI. We don't need the CLI, but I have these gatekeeper devices that constantly fill /var/adm/messages and the like with corrupt label errors. Is there anything I can do (short of deleting the devices on machine start) to get rid of them? Or should I just try to get our SAN guy to get the installer for the CLI? These things are getting annoying, and the devfsadmd daemon keeps rediscovering them on boot.

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• A Linux DHCP server that will listen on an non-broadcast (tap) interface?

  - by TomOnTime

  Are there any Linux DHCP servers that will listen to what Cisco calls an "unnumbered" interface, or what others might call a "NBMA" (non-broadcast) interface. I have a Linux system that connects to a number of others using GRE tunnels. The machines on the other end send DHCP requests to this machine, I can see them with tcpdump. However, ISC DHCP 3.0.3 refuses to listen to the interface because it is non-broadcast. The interface I'd like DHCP to listen to is: tap2 Link encap:Ethernet HWaddr removed-for-privacy inet6 addr: removed-for-privacy/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:518 errors:0 dropped:0 overruns:0 frame:0 TX packets:510 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:500 RX bytes:196242 (191.6 KiB) TX bytes:52425 (51.1 KiB)

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• Does Windows 7 support multiple simultaneous nVidia graphics cards with different drivers?

  - by mckenzieg1

  On one of my dev machines at work (currently running XP), I have two nVidia graphics cards: Quadro NVS 440 (my original card, for my three primary monitors) GeForce GTX 275 (just added, for CUDA development) I can get both cards to work OK by installing the latest GeForce drivers, but I get some annoying-but-not-crippling display artifacts on the Quadro's screens (mostly scattered black rectanges where repainting fails for a few bits of UI in certain applications). Under XP, this seems to be the best I can do. I can use Device Manager to supposedly install different nVidia drivers for the two cards (the latest Quadro drivers for the NVS, the latest GeForce drivers for the GTX), but I actually end up with the same driver for both, because the driver dlls all have the same names and get installed on top of one another in the system directory. I have read that Win7 has a new video driver architecture that better supports multiple heterogeneous cards. Does anyone know if that will handle my scenario? If so, it will give me a compelling reason to get that machine on Win7 ASAP.

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• Configuring subdomains for a machine (Win2k8) in a lan

  - by RMS

  I am currently setting up a windows 2008 server to host a website with multiple subdomains, all accessible only within the lan. also, there is no active directory. what I did is : 1 - computer name : 'web' 2 - in IIS, I added a site binding as 'site1.web' to the default web site 3 - added DNS role to the server 4 - added 'web' as principal zone in direct lookup zones (default options) 5 - added CNAME 'site1' From a client machine, in tcpip config I added the ip address of 'web' to the DNS list in addition to the ISP DNS. (client machine ip is from DHCP) Now browsing to 'http://web' or 'http://site1.web' works correctly. My question is, is it possible throught additional steps in the server to have the websites accessible without requiring the DNS config in all the client machines ? thanks in advance

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• OpenVSwitch and Virtualbox configuration

  - by Newbie

  I am trying to setup a lab network with OpenVSwitch (Virtual L3 Switch). I want to connect my 3 Virtualbox guest machines (running Debian 6) using OpenVSwitch. But, confused as what should I do first and how should I do this. I mean should I install OpenVSwitch on my VM or on my host machine? If I install on my host machine, then should I make to connect to my VMs. OR If I install OpenVSwitch on one of my VM, then how to connect the rest of the VMs to virtual switch. I know, there is option to connect internal networks in virtualbox, but I a want L3 switch to interconnect my VLANs. Can someone guide me here. Please & Thank you.

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• Cannot schedule task to run under domain user account other than current user

  - by Filburt

  On our Win 2008 machines I can't schedule tasks for domain users because the domain name does not resolve to network name but the AD dc name. The "network name" looks like ABCDEFGE-HIJKLM and the "dc" / "name" would look like ABCDEFGE-HIJKLMN. When selecting the domain user account the account qualifier will look like ABCDEFGE-HIJKLMN\task.user. This results in an "invalid account" error. When however keeping the currently logged in user it will display ABCDEFGE-HIJKLM\current.user. Does this behaviour result from the presumable "illegal" domain name? Is there a workaround for this? update I could of course log in as the desired domain account and create the task but since this account is a account used for running services I want to avoid creating a user profile on the machine.

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• File not updating in symlink'd folder in IIS

  - by Daniel Short

  I have the following setup: Site1/Shared/ - Physical folder Site2/Shared/ - symlink using mklink to Site1/Shared I've updated a javascript file in Site1/Shared/scripts, and the change is being reflected on Site1. However, the change is not being reflected through IIS on Site2. When I open Site1/Shared/scripts/common.js and Site2/Shared/scripts/common.js, they match exactly. But when I view the files through Safari, Firefox, Chrome, IE, from any machine (even machines that have never visited the sites), the change is not reflected on Site2. Here are URLs to the files to review: Site 1: http://www.landsofamerica.com/shared/scripts/common.js Site 2: http://www.landsoftexas.com/shared/scripts/common.js These files look exactly the same when logged onto the server, and the shared folder under landsoftexas.com is a symlink created using mklink to the shared folder under landsofamerica.com. Any idea what might be causing IIS to serve the wrong file?

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• Easy way to restrict permissions in an elementary school computer lab?

  - by Andrew

  I'm putting together an elementary school computer lab. I have nine winxp pro machines that are not networked and do not have internet access (no money to do either). I've created separate student and admin accounts, and have the students set as limited users. However, I'm interested in further restricting their permissions. I want to make it such that they cannot: -delete any files, even just from their own profile -rename any files -move around the icons on the desktop -change any display settings -access a usb device without a password (they bring in their own from home which are chock-full of viruses) Oh, one last thing, they still have to be able to save word documents. Is this even possible? I can download software, but, like I said: no internet, no server.

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• Windows 7 stopped connecting to samba share

  - by Jan

  I have a problem with Windows 7 Home connecting to samba on linux server. It's worked fine for a year and without any changes in configuration or updates it suddenly stopped working. The strangest thing for me is that it stopped working for no reason that I could think of. After a few minutes after trying to connect I get: \\ip is not accessible. You might not have permission to use this network resource. Contact the administrator of this server to find out if you have access permissions. Other computers in that network (XP machines) connect to samba without any problem. I've tried adding LmCompatibilityLevel as described here: http://www.tomshardware.com/forum/75-63-windows-samba-issue , but it didn't help.

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• Unable to connect to another computer from the Task Scheduler on Windows 7

  - by Clem

  I am getting the following error when trying to connect to another computer from the Task Scheduler on Windows 7: "The remote computer was not found." The computer that I am trying to connect to is definitely on the network as I can ping it and browse its shared folders in Windows Explorer. Note that I get the same error message when trying to perform the same operation from Performance Monitor. This suggests that I need to something to enable remote connection to the Task Scheduler. I am not very experienced with Windows administration and I am not sure where to look. To give a bit more context, I want to use the Task Scheduler to automatically start Perf Mon on a few machines at my company. I'd like to setup the Task Scheduler remotely. Does anyone know what I need to do?

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• Which GPO is making my Domain Controller my clients' DNS server?

  - by Harry Muscle

  I maintain a small domain (about 20 clients) and we need to make some changes to the DNS server that's being used by the clients. All the clients have been hard coded to use the domain controller as their DNS. Since these are new machines, and I never changed their DNS settings, I'm guessing there must be a GPO that's causing them to use the domain controller as their DNS. Since we don't have any GPO other than the default one yet, it's got to be the default GPO, however, I have looked through all the GPO settings and none of them refer to anything related to DNS. So I'm wondering if there's anything else that might be causing this. Any help or advice is highly appreciated. Thanks, Harry

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• How to make HOME or END keys work in mc running on OS X (ssh)

  - by Sorin Sbarnea

  I installed MacPorts on OS X 10.5 and I found out that when I connect to the computer using SSH and use mc - Midnight Commander - the HOME and END keys do not work. I have to mention that I'm using putty and I am able to use the keyboard very well on Linux machines like Fedora, Ubuntu,... Here is putty keyboard configuration (a configuration I found to be optimal over time): Backspace key: 127 Home/End keys: Standard Function keys: Xterm R6 Cursor keys: Normal Numpad: normal Terminal type string: xterm-color I'm looking for a command line solution/script that does these changes, this make much easier to create a prepare OS script for configuring a new OS.

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• How do I keep multiple copies of Outlook in sync when using RPC over HTTP?

  - by Don

  I use Outlook 2007 at work with our Exchange 2003 server. I just setup my home system with Outlook 2007 so that I could use the RPC over HTTP to access Exchange without having to use a VPN. It works fine. I can get mail, send mail, etc. What it doesn't seem to be doing is staying in sync. For example, I read a few messages at home, moved them into different folders from the Inbox, etc. That all seemed fine. When I login to my work machine and look at the copy of Outlook there, the mail is still unread and nothing has been moved. Am I missing something simple here? I would have to assume that my home machine should be telling Exchange where these messages belong and that they've been read. Both machines are running Windows 7, if that matters. Ideas?

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• How to use sshd_config - PermitUserEnvironment option

  - by laks

  I have client1 and client2 both are linux machines. From client1: client1$ssh root@client2 "env" it displays list of ssh variables from client2. Things I did on client2: I want to add new variable to client2 . So I edited sshd_config to PermitUserEnvironment yes and created a file environment under ssh with following entry Hi=Hello then restart sshd /etc/init.d/sshd Now from client1 trying the same command client1$ssh root@client2 "env" didn't provide the new variable "Hi". ref: http://www.raphink.info/2008/09/forcing-environment-in-ssh.html http://www.netexpertise.eu/en/ssh/environment-variables-and-ssh.html/comment-page-1#comment-1703

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• Saving a compressed text attachment results in empty file

  - by Brandon

  I have a text document with compressed text in it, the text is auto generated by a program. The text document is fine on my machine (Vista 32-bit), and can be used normally. The other person can also create and use these files just fine. (XP 32-bit) However when I email it to someone else (Outlook 2003 on both machines) the attachment is sent fine (5kb) but when the other person tries to save it somewhere, the saved file is empty. (64b) At first I thought Outlook didn't like compressed text files (security risk maybe?), but I can receive the text files just fine. Is there a setting somewhere on the other persons machine that tells Outlook not to trust compressed text? Can anyone think of a reason why these files are being saved as empty text documents?

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• Symantec CPS / Backup Exec 11D Service stuck in "Starting" Status

  - by user42289

  I have two Windows 2003 (one is SE, one is SBS) both SP2, both are Virtual Machines of Microsoft Virtual Server 2005 R2. All of a sudden about 2 weeks ago, the Symantec Backup Exec / CPS 11D stopped working on them. One is the Media server, one is our Exchange 2003 Server. There is another copy of CPS on our file server that the service is running fine on. However the one that is fine is not a VM. When I say stop working, the "backup exec continuous protection agent" service is stuck in "starting" status. On the non Exchange server I've tried uninstalling the last Windows Updates that were run some time around the time of failure. I've tried repairing the install of CPS. I've tried uninstalling it and reinstalling. Exact same problem in the end.

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• Memeory Leak in Windows Page file when calling a shell command

  - by Arno

  I have an issue on our Windows 2003 x64 Build Server when invoking shell commands from a script. Each call causes a "memory leak" in the page file so it grows quite rapidly until it reaches the maximum and the machine stops working. I can reproduce the problem very nicely by running a perl script like for ($count=1; $count<5000; $count++) { system "echo huhu"; } It is independent of he scripting language as the same happens with lua: for i=1,5000 do os.execute("echo huhu") end I found somebody describing the same issue with php at http://www.issociate.de/board/post/454835/Memory_leak_occurs_when_exec%28%29_function_is_used_on_Windows_platform.html His solution: Firewall/Virus Scanner does not apply, neither are running on the machine. We can also reproduce the issue on other Developer Machines running XP 64, but not on XP 32 Bit. The guilty guy for the allocation is C:\WINDOWS\System32\svchost.exe -k netsvcs which runs all the basic Windows services. Does anybody know the issue and how to resolve it ?

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• Reliable Backup Solution for Linux for Complete System Restoration

  - by Chris S

  What's the best backup solution for Linux that can completely restore the entire filesystem to a blank harddrive (including partitioning) after an old harddrive dies? I'm currently running a few Ubuntu machines, some with RAID-1 and others without RAID (mostly laptops). I'd like to implement a backup solution that can take incremental snapshots of the entire filesystem, so that if I were to replace all the harddrives in a machine, I could use the backup to restore a perfect copy of the previous filesystem. Unfortunately, nearly all the backup solutions I've found seem to be glorified rsync scripts, which only backup some files, and have no easy way to restore once the entire filesystem is gone. Some of the more complicated solutions, like Bacula, might do what I need, but require a complicated server/client setup and are notoriously difficult to maintain. I've heard that Apple's TimeMachine utility has this ability, and I've had similar success taking differential disk images with Acronis True Image on Windows, but of course neither of these work on Linux. Is there anything comparable for Ubuntu?

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