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• Securing RDP access to Windows Server 2008 R2: is Network Level Authentication enough?

  - by jamesfm

  I am a dev with little admin expertise, administering a single dedicated web server remotely. A recent independent security audit of our site recommended that "RDP is not exposed to the Internet and that a robust management solution such as a VPN is considered for remote access. When used, RDP should be configured for Server Authentication to ensure that clients cannot be subjected to man-in-the-middle attacks." Having read around a bit, it seems like Network Level Authentication is a Good Thing so I have enabled the "Allow connections only from Remote Desktop with NLA" option on the server today. Is this acion enough to mitigate the risk of a Man-in-the-Middle attack? Or are there other essential steps I should be taking? If VPN is essential, how do I go about it?

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• How secure is a bluetooth keyboard against password sniffing?

  - by jhs

  In a situation where an admin will enter sensitive information into a keyboard (the root password), what is the risk that a bluetooth keyboard (ship by default with Mac systems these days) would put those passwords at risk? Another way of asking would be: what security and encryption protocols are used, if any, to establish a bluetooth connection between a keyboard and host system? Edit: Final Summary All answers are excellent. I accepted that which links to the most directly applicable information however I also encourage you to read Nathan Adams's response and discussion about security trade-offs.

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• Is there a lightweight MTA for Ubuntu 9.10 Desktop?

  - by Joe Casadonte

  I'm writing a Perl script to run as a cron job, and I want to email results & errors to a local account on the laptop. I'd like something that can talk SMTP (do any MTAs not adhere to SMTP?). I use Thunderbird 3, so I'll also need a POP/IMAP server (unless T-Bird can read straight from an mbox file; I'll have to check into that). No need for spam controls as I'll lock it down real tight, only accepting mail originating from the laptop itself. Thanks!

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• How to find a hidden streaming video/audio link and record it

  - by Stan

  I've been using 'URL snooper' to find the hidden streaming url. And feed that url to VLC to record streaming video/audio. But the VLC can't read those url. Then I also found that the url is like a floating url that changes every several hours. So the same audio station won't have same url. The streaming audio provider has bunches of audio stations and shuffle the link frequently. Is there any way to record the streaming media in this case? Please advise, thanks.

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• Thunderbird: moving email from local Junk folder to IMAP folder yields "Message contains invalid header"

  - by Peltier

  Whenever I try to move an email from a local Junk folder to an IMAP folder in Thunderbird, I get the following error message: The current command did not succeed. The mail server responded: Message contains invalid header If Thunderbird's Junk folder is an IMAP folder on the server, then after Thunderbird has moved messages to that folder, I can successfully move messages from Junk back into to some other IMAP folder. However, if the Junk folder is not on the server, then moving a message from the local Junk folder to an IMAP folder yields the aforementioned error. The only interesting thing I've found about this error is "Message contains invalid header" from the MozillaZine Knowledge Base. That article officially is about importing folders from another email client, and does not mention the Junk filter as another possible cause. However the proposed solution is not very helpful since it requires manual editing of the message box files. Any better ideas? EDIT: make sure you read the comments before answering the question.

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• Remote RAID Control in ESXi on a Dell PowerEdge 2950 Using OpenManage

  - by yoyomommy

  I was wondering how one can add a drive into an existing RAID array while ESXi is still running. I have read that you are able to use Dell OpenManage to do this. I have installed OMSA 7.0 on the VMWare ESXi host (5.0 and fully updated) and I've installed OpenManage Essentials on a Windows Server 2008 R2 guest. The issue that I'm having is that OpenManage is unable to see my RAID controller. I have seen videos and photos as parts of guides on how to do this online, so I would assume that the functionality exists and I just have it set up wrong.

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• APC Not Enabled (WHM on CentOS)

  - by gamerzfuse

  I know this questions has been beat to death, but I've read almost all the responses and it hasn't solved my issue. I installed APC (no noted errors), I told PHP.ini to enable it and I made sure I am running PHP in FastCGI with SuExec turned off. Still I have no go. PHP / suEXEC Configuration Default PHP Version (.php files) 5 PHP 5 Handler fcgi PHP 4 Handler none Apache suEXEC off Apache Ruid2 off php.ini Configuration Alternative PHP Cache apc.enabled Alternative PHP Cache apc.shm_segments Alternative PHP Cache apc.shm_size When I run the APC.php file I get this message: No cache info available. APC does not appear to be running.

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• Can a truecrypt container be moved on Fedora Linux?

  - by Thayananthan Narayanan

  I have created a truecrypt container (100GB) to store very important files with vital information hidden on my hardrive running Fedora Linux OS. Now, I want to move the container to portable hardrive. From what I read so far, you should be able to do it easily like any other file. However, I am running into problem. Fedora won't let me. It keeps giving me "Permission denied" error. I think I need to login as a root or superuser, but how do you do that on Fedora. What am I doing wrong?

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• How to change theme in Windows 7 with Powershell script?

  - by Greg McGuffey

  I would like to have a script that would change the current theme of Windows 7. I found the registry entry where this stored, but I apparently need to take some further action to get windows to load the theme. Any ideas? Here is the script that I'm trying to use, but isn't working (registry updated, but theme not changed): ###################################### # Change theme by updating registry. # ###################################### # Define argument which defines which theme to apply. param ( [string] $theme = $(Read-Host -prompt "Theme") ) # Define the themes we know about. $knownThemes = @{ "myTheme" = "mytheme.theme"; "alien" = "oem.theme" } # Identify paths to user themes. $userThemes = " C:\Users\yoda\AppData\Local\Microsoft\Windows\" # Get name of theme file, based on theme provided $themeFile = $knownThemes["$theme"] # Build path to theme and set registry. $newThemePath = "$userThemes$themeFile" $regPath = "HKCU:\Software\Microsoft\Windows\CurrentVersion\Themes\" Set-ItemProperty -path $regPath -name CurrentTheme -value $newThemePath # Update system with this info...this isn't working! rundll32.exe user32.dll, UpdatePerUserSystemParameters Thanks!

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• What are the limitation for the battery for notebook HP HDX18?

  - by theateist

  I have HP HDX X18T-1200 CTO Premium notebook. My battery died and I would like to buy a new one. The specs written on battery itself are: NSTNN-OB75 RATING: 14.4 - 73Wh 3.14.4v, 5000mAh. The specs written on the dock where the battery goes are: NSTNN - Q35C My questions are: How to calculate the number of cells. I've read some post how to calculate but I don't know the nominal voltage. I saw batteries with 8,12 cells and 106Wh and 7000mAh, can I use it on my laptop or it can make damage. In other words, what the max mAh and Wh I can use for battery in my notebook?

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• How to detect when a user copies files from a server over the network?

  - by Mr. Graves

  I have a few virtual servers + desktops that are used for shared development with remote users, including some consultants. Each user has an account with access to most aspects of the server. I don't want to prevent people from being productive, or track passwords or read emails, but I do want to know when and what files they copy from the virtual server or what they upload from the server to a remote site, and what if any applications they install. This will help make sure my IP is protected, that no one is installing tools they shouldn't, and that things are licensed appropriately. What is the simplest way to do this? In order of importance I would say detecting file transfers off the machine to be most critical. Thanks

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• Program broke my windows. Everything randomly minimizes even after multiple restarts

  - by Xitcod13

  I just installed LoL (league of legends) on my computer. The problem is that almost every time after I play the game, it minimizes all my windows which is really annoying. What is worse however is that afterwards other programs do this as well. In the internet browser doesn't minimize but it does loose focus. For example when i type it randomly looses focus and i have to click on the browser window again to it registers my typing. Is there any way to fix this? What can cause such a strange behavior?? In addition this problem persists even after restarting my computer. I previously thought it was internet driver. I no longer think so this happened right after I started playing the game and seems pretty persistent. Please read the comments for further information. This pretty much renders my computer useless. Even typing this takes a huge effort.

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• Can't connect to my FTP server, why?

  - by Joseph

  I have a windows 2008 server running with FTP 7 on IIS 7. I have it configured to connect as it is out of the box, with a particular user (lets say john) with read/write access. When I use my FileZilla client software, I can connect to the server as john just fine. No problems at all. However, when I try to connect using Windows Explorer or using the cmd prompt I get stone walled, saying "Login failed". My client machine is Windows Vista Ultimate. Does anyone know what might be causing this?

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• How to make VirtualBox headless answer on rdp port?

  - by stiv

  I'd like to run windows xp on RDP: $ VBoxManage modifyvm winxp32 --vrdeport 3389 $ VBoxHeadless -s winxp32 -v on Oracle VM VirtualBox Headless Interface 4.1.18_Debian (C) 2008-2012 Oracle Corporation All rights reserved. (waiting) in another window: $ telnet localhost 3389 Trying 127.0.0.1... telnet: Unable to connect to remote host: Connection refused Yes, I've read about extension: $ sudo VBoxManage extpack install Oracle_VM_VirtualBox_Extension_Pack-4.1.20-80170.vbox-extpack 0%... Progress state: NS_ERROR_FAILURE VBoxManage: error: Failed to install "Oracle_VM_VirtualBox_Extension_Pack-4.1.20- 80170.vbox-extpack": Extension pack 'Oracle VM VirtualBox Extension Pack' is already installed. In case of a reinstallation, please uninstall it first Looked through all manuals and all help requests. No success. What's wrong? Any ideas?

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• Hyper-V networking....still not sure which way to go??

  - by CZhale

  We have our Hyper-V server up and running (Windows 2008 ENT SP2) and started to create some of our VMs. The server has 4 total nics. 2 onboard Broadcom 1gb nic cards and a pci dual port Intel Pro cards 1gb. Right now, I have setup 1 broadcom nic to be the hyper-v host nic, and setup the other broadcom nic for the VMs. We are not using the Intel Nics....should we be thinking about teaming?Link Aggregation?? I just want to achieve the best possible setup for the network, but have read many things for and against teaming the nics?? Thoughts?

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• Nxlog Multiline Input to 1 Syslog Message

  - by Eric

  I am using nxlog to tail a custom log file on one of my Windows servers. Each entry in the text file looks similar to this. =================================================================================================================== 1/14/2014 3:08:48 PM DOMAIN\user1 adding group member... Domain: blah Group: TestGroup Member: CN=Joe Bob,CN=Users,DC=blah,DC=ARG,DC=com 1/14/2014 3:08:48 PM 1 member added.<br> ================================================================================================ I'm trying to send this log to my syslog server and I want to combine these multiple lines to 1 line so I can easily grep/search for specific users or groups. I've read some of the documentation on nxlog's website regarding multiline but haven't found a specific config to put them all in 1 entry with a syslog header. Thanks, Eric

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• Jail Linux user to directory for FTP login

  - by Greg

  I'm planning on using vsftpd to act as a secure ftp server, but I am having difficulty controlling the linux users that will be used as ftp logins. The users are required to be "jailed" into a specific directory (and subdirectories) and have full read/write access. Requirements: - User account "admin_ftp" should be jailed to /var/www directory. - Other accounts will be added as needed, for each site... e.g: - User account "picturegallery_ftp" should be jailed to /var/www/picturegallery.com directory. I have tried the following, but to no avail: # Group to store all ftp accounts in. groupadd ftp_accounts # Group for single user, with the same name as the username. groupadd admin_ftp useradd -g admin_ftp -G ftp_accounts admin_ftp chgrp -R ftp_accounts /var/www chmod -R g+w /var/www When I log into FTP using account admin_ftp, I am given the error message: 500 OOPS: cannot change directory:/home/admin_ftp But didn't I specify the home directory? Extra internets for a guide how to do this specifically for vsftpd :)

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• How to run "mongodb --repair" if it's an Upstart job?

  - by Wolfram Arnold

  My MongoDB server died. The log says something about an unclean shutdown and an existing mongodb.lock file. It recommends to remove the lock file, then restart the mongodb server with --repair. However, on my system (Ubuntu 10.10), I've installed MongoDB via an apt-get package, and it's set up as Upstart job. If I run mongodb from the command line, it won't find the data, none of the paths are set correctly. Surely, I could read the man page, try to emulate what Upstart would do, give it all the correct parameters plus --repair but that seems like a lot of trouble. There must be a simpler way, that's not fighting Upstart. What is it?

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• Automatic storing package before installing it on .deb based system?

  - by macias

  The reason I am asking this question is I am concerned about simple rollback (I already read how to find out what packages were installed). So I would like to set global (per entire system) option, that forces system to store each package before installing/updating it. With such workflow, I could update whatever I want, and if for example the newest version of Dolphin would be worse than previous one I could simply go to directory with stored packages and install previous version instead (the previous version is either base version -- on ISO -- or version from previous update). Is there such feature as global option to automatically store each package before install? It have to be guaranteed that no package is updated on-fly, i.e. without being stored before. I am learning LMDE, but answer for any .deb based system would be fine -- Ubuntu, Debian, you name it.

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• how to upgrade the apple OS from 10.6.8 to 10.9?

  - by Mohamed KALLEL

  I read the following informations from the apple discussion: Mac OS X 10.9 Mavericks, breaks the tradition, and is available free (subject certain license restrictions) for anyone from 10.6.8 through 10.8.5 as long as they meet the system requirements for 10.8 I have apple laptop with OS 10.6.8 and I want to upgrade my OS to 10.9. and according to abpve information this is possible. But I do not how to do that with my apple laptop. Could you tell me how to upgrade my apple OS from 10.6.8 to 10.9?

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• Bare minimal Chef provisioning and deployment?

  - by Andrew McCloud

  I've read the documentation on Chef twice over. I still can't wrap my head around it's concept because they skip but fundamentals and jump to complex deployments with chef-server. Using chef-solo and possibly knife, is there a simple way to provision a server and deploy? I may be wrong, but it seems like with my cookbooks prepped, this should be very simple. knife rackspace server create --flavor 1 --image 112 That provisions my server. I can optionally pass --run-list "recipe[mything]", but how do my cookbooks in ~/my_cookbooks actually get on the server? Do I have to manually transfer them? That seems counterproductive.

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• Why doesn't Windows 7 allow me to format?

  - by hydroparadise

  Dell support can be fun to deal with right? Ultimately, I have been going back and forth with Dell on an issue and came to reinstalling Windows 7 32-Bit Pro. The problem is that Windows Setup will not let me format. I've read other posts that say Windows 7 must installed on first partition here. But now that confuses me because the computer came shipped with the installation on the third partion as shown in the picture below? Is there a real problem? Or is this a Microsoftism? Should I obliterate the "OEM" partition to make this work? Please note that the format, delete, new, and extend options are grayed out.

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• Linux LVM snapshot commit or revert?

  - by Shewfig

  Hi, I'm about to perform an experimental upgrade on my CentOS 5 server. If the upgrade fails, I want to be able to back out the changes to the filesystem. This scenario seems similar to the example in Section 3.8 of the LVM HOWTO for LVM2 read-write snapshots - but the example is rather lacking in actual how-to. 1) How would I commit the changes, merging them back into the original partition? 2) How would I revert the changes, restoring the filesystem back to its original state? Should I assume that I'll need to restart several services, if not outright reboot? 3) Is it possible to snapshot only certain directories on a partition, or is it a partition-wide operation? Thanks...

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• Get sudoers information for all users on a server

  - by Jon Kruger

  I want to collect information on what sudoers actions a user can perform on a server. From what I've read, you can do this with the command sudo -l -U username. However, one server that I have has a slightly older version of sudo (1.6.7p5) and the -U option doesn't seem to exist (I don't own the server so I can't just upgrade to a newer version of sudo). Has anyone ever had to collect sudoers information for all users on a server? How would you recommend doing it?

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• Protecting Windows SMTP service against the spam

  - by MainMa

  Hi, I'm trying to use a Windows SMTP service on Windows Server 2008, but I can't understand how to secure it. Basically, if I open firewall for local network IPs only for %windir%\system32\inetsrv\inetinfo.exe and keep Connection and Relay settings of SMTP Virtual Server to "All except the list below" (with an empty list), a few minutes later I see spam appearing in Queue directory. (Why? Isn't firewall intended to block this?) Now, if I set Connection or Relay to "Only the list below", specifying the range of local IPs, I can't use the SMTP server nevermore (a "Unable to read data from the transport connection: net_io_connectionclosed." exception is thrown). So what is the way to get rid of spam from internet but let send mails from local network?

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