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  • DNSCurve vs DNSSEC

    - by Bill Gray
    Can someone informed, please give a lengthy reply about the differences and advantages/disadvantages of both approaches? I am not a DNS expert, not a programmer. I have a decent basic understanding of DNS, and enough knowledge to understand how things like the kaminsky bug work. From what I understand, DNSCurve has stronger encryption, is far simpler to setup, and an altogether better solution. DNSSEC is needlessly complicated and uses breakable encryption, however it provides end to end security, something DNSCurve does not. However, many of the articles I have read have seemed to indicate that end to end security is of little use or makes no difference. So which is true? Which is the better solution, or what are the disadvantages/advantages of each? edit: I would appreciate if someone could explain what is gained by encrypting the message contents, when the goal is authentication rather than confidentiality. The proof that keys are 1024bit RSA keys is here.

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  • Is there a way to make software available for remote installation in Windows Server?

    - by Michael J. Gray
    I've heard of folks having a sort of "software repository" which contains a database of product keys and then network installation media for operating systems and other Microsoft software, such as Office. With this, they were then able to join a computer to the domain and grant that user privileges to a set of software and then the client was able to use it either remotely or locally on their machine. I believe it installed from the server on to their local machine. Does anyone happen to know what this is?

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  • How can artificially create a slow query in mysql?

    - by Gray Race
    I'm giving a hands on presentation in a couple weeks. Part of this demo is for basic mysql trouble shooting including use of the slow query log. I've generated a database and installed our app but its a clean database and therefore difficult to generate enough problems. I've tried the following to get queries in the slow query log: Set slow query time to 1 second. Deleted multiple indexes. Stressed the system: stress --cpu 100 --io 100 --vm 2 --vm-bytes 128M --timeout 1m Scripted some basic webpage calls using wget. None of this has generated slow queries. Is there another way of artificially stressing the database to generate problems? I don't have enough skills to write a complex Jmeter or other load generator. I'm hoping perhaps for something built into mysql or another linux trick beyond stress.

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  • ESXi boot time with 9 iSCSI targets

    - by Myles Gray
    Our ESXi hosts have always been slow booting when it came to iscsi_vmk loaded successfully - sitting here for almost 5 minutes. In all a full server reboot takes almost 12 minutes. We have 9 iSCSI targets per host (5 SANs with redundant interfaces) configured as dynamic discovery targets. Has anyone experienced this? Can it be remedied with static discovery mode? Are there any debug steps we can work through to help diagnose this? (All our targets are accessible at boot so i'm assuming the host isn't stuck retrying to connect to a target)

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  • Compaq nc4200 screen cutting out and keyboard lagging after dropping - could I repair this?

    - by Holly Gray
    I have a HP Compaq nc4200 laptop. I got it from a family member who no longer needed it, who got it from a sale of old office equipment, so it's at the very least third-hand, and somewhat battered. Today, I dropped it. It seemed unharmed at first, but the screen cuts out every few minutes (sometimes seconds), then fades back. Keyboard input also occasionally starts lagging, as does the mouse. It might be a coincidence, but, oddly, it seems as if, when the screen cuts out, it comes back sooner if I use the trackpad. Is this something that I could fix? What might be causing it?

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  • Best way to provide redundant switching/links to server

    - by Myles Gray
    We have 3x ESX hosts and 2x SANS that we wish to move to a redundant 10G networking infrastructure. We have 4x Dell PowerConnect 8024F's to provide our backbone and are configured as so (only core switches relevant to this question): So the questions are: 1) Do the interconnects between the 4x 8024F's need to be LAG'd or just STP'd 2) As the NICs on the servers are split across 2 switches, does any special configuration need to be done here or on the switches? 3) If a link or switch fails will the switches automatically find a new path to the Server/SAN?

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  • How do I restore a Windows Server 2008 R2 bare metal backup to a Windows Server 2012 R2 Hyper-V instance?

    - by Michael J. Gray
    I have been trying to find a simple way to migrate a physical Windows Server 2008 R2 installation over to a virtual machine hosted on Windows Server 2012 R2 Datacenter Edition /w Hyper-V. I came across the bare metal backup feature on Windows Server 2008 R2 and assumed I would be able to easily back it up and simply restore it into a new virtual machine by booting the installation media and getting into the Windows recovery process. When I attempted this, Hyper-V got into a network based restore process, but I do not have a PXE server or anything like that and I would rather not set it up. I tried mounting the VHD produced in the bare metal backup, just to see if it would somehow work, but it of course did not and failed with an error related to an incorrect boot device. I checked the virtual machine's BIOS settings and everything looked fine. I did not expect this to work anyway, so I stopped working through this method any further. Is there a way to take my bare metal backup and restore it into a virtual machine without a PXE server or SCVMM? I am opening to using proprietary tools but since the last time I did this I used Norton Ghost, which is no longer supported, I figured I would try doing it with what is readily available.

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  • Configure spamassassin to mark very similar messages as spam

    - by Caleb Gray
    Users on my server have been receiving spam, consistently, for some time now. I have most of spamassassin's plugins enabled, and I have made sure to enable verbose logging, where I can see that all of the plugins are working. Why is it, then, that my users are able to receive the same exact junk mail several times in a day without the message being flagged in some way? Here are the relevant headers of an email that I personally have received several copies of: X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on sub.domain.tld X-Spam-Level: *** X-Spam-Status: No, score=3.0 required=4.0 tests=BAYES_50,FSL_HELO_NON_FQDN_1, HELO_NO_DOMAIN,HTML_MESSAGE,RCVD_IN_BRBL_LASTEXT,RDNS_NONE autolearn=no version=3.3.1 Have I accidentally missed the plugin that can see that I, and others, have received the same message multiple times in a short period of time?

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  • gl_FragColor and glReadPixels

    - by chun0216
    I am still trying to read pixels from fragment shader and I have some questions. I know that gl_FragColor returns with vec4 meaning RGBA, 4 channels. After that, I am using glReadPixels to read FBO and write it in data GLubyte *pixels = new GLubyte[640*480*4]; glReadPixels(0, 0, 640,480, GL_RGBA, GL_UNSIGNED_BYTE, pixels); This works fine but it really has speed issue. Instead of this, I want to just read RGB so ignore alpha channels. I tried: GLubyte *pixels = new GLubyte[640*480*3]; glReadPixels(0, 0, 640,480, GL_RGB, GL_UNSIGNED_BYTE, pixels); instead and this didn't work though. I guess it's because gl_FragColor returns 4 channels and maybe I should do something before this? Actually, since my returned image (gl_FragColor) is grayscale, I did something like float gray = 0.5 //or some other values gl_FragColor = vec4(gray,gray,gray,1.0); So is there any efficient way to use glReadPixels instead of using the first 4 channels method? Any suggestion? By the way, this is on opengl es 2.0 code.

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  • Why do some machines respond with many RST packets instead of RST-ACK to refuse a connection?

    - by Michael J. Gray
    I have recently been trying to track down a problem with one of our systems and have noticed that it is simply not allowed to connect to a remote machine. However, the remote machine (not controlled by us) is responding to our request for a connection with many TCP RST packets on a different port (26469, 26497, 26498) than the one we originated on (53). It simply wouldn't let up at one point and flooded us with about 10 packets/second for an hour or two of only RST on those obscure high ports. Out of the thousands of nodes we're connecting to, this is the only one ever to show this behavior. What could possibly cause this? EDIT Below is a screenshot of Wireshark when it happened. I don't have the actual dump anymore and can't reproduce this specific scenario every time. Basically, we sent a SYN and immediately got RST on an odd port and so we respond with RST and just keep going back and forth.

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  • Server market shares

    - by Bill Gray
    here can I find somewhat reliable indications of server market shares, without having to fork out $$$$$ for IDC or Gartner reports? I have considered the W3 statistics, net applications etc, and these are not what I would consider reliable. Is there anything more, that is free?

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  • What special configuration is needed to have a domain controller with DNS on a VM in Hyper-V?

    - by Michael J. Gray
    I have a server running Windows Server 2012 and it only has the Hyper-V role. I have a VM also running Windows Server 2012 and it has the Active Directory: Directory Services and DNS ([example.com]) roles. It has been promoted to a domain controller for [example.com]. In the virtualization host I have joined the domain successfully. On a laptop on the network, it can ping my DNS that is inside the VM on the virtualization host. However, it can't resolve anything through the DNS. I figured it was a firewall issue where the DNS had the firewall allow rule, but the virtualization host did not. I added that, but it didn't fix the issue. On my laptop, I get "UnKnown can't find [example.com]: No response from server" immediately. There's no time out, it just comes back right away. What have I overlooked?

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  • How do I listen to my microphone through my speakers in Windows 7?

    - by Gray Adams
    I've looked about and before you say it: I've used the "Listen to this device" feature built into Windows. The issue is that it is a USB microphone and there is a second delay before when it plays on the speakers, literally making me go quiet because my brain doesn't work too well hearing myself a second after I say something. I use Realtek Audio, so it works differently from the monopolistic Creative sound cards. There is no "What U Hear" or "Line In" levels. It's just "Speakers" and "Microphone". Is there a software I can use that will not have delay? I want to wear nice headphones and still hear myself

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  • Mobile Device emulator cannot access localhost

    - by Diana
    I am using Windows Mobile 6 Professional Emulator and Windows Mobile Device Center. I connected and cradled the emulator to my computer. I am trying to connect from the browser of the emulator to a webservice that is deployed in the IIS of my computer (same machine where the emulator is installed). If I connect my computer to the internet, I can access any website, including my local WS (using the IP returned by ipConfig). The problem is when I disconnect the computer from the Internet: I cannot access my local web service using the IP (internal one returned by ipconfig), or machine name. Do you have any ideea what settings am I missing? I am sure this it's possible somehow, I just don't know how... PS: The goal is to access the WS from a mobile application, but until I cannot access it from the browser, I cannot access it from the application either. Thank you!

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  • jQuery slideToggle stay open on hover

    - by durilai
    I have a div that I have bound the jQuery hover event to activate a slideDown using slideToggle: <div class="Square"> <div class="RedSquare"></div> <div class="GraySquare"></div> </div> $("div.RedSquare").hover( function() { $(this).siblings("div.GraySquare").slideToggle("fast"); }, function() { $(this).siblings("div.GraySquare").slideToggle("fast"); } ); It toggles a div '.GraySquare' right below it. Basically making a gray box slide down from the red box. The problem I am facing is that when the mouse moves over the gray div the slide toggles up. I want it to remain down when hovering over the red or gray square. Any help is appreciated.

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  • Visual Studio 2008 debug does not stop on error

    - by Diana
    I have a simple Windows App written in Visual Studio 2008 (.NET 3.0, C#). Without making any change to the project, solution or Visual Studion (from what I can remember), something weird is happening: when I debug (or run) my application, when it hits an error, Visual Studio does not show me any messagebox with the error, and does not stop execution. It "looks" like nothing happended... the code after the error is not executed, but everything else continues to behave like nothing had happened. Any ideeas about what might be wrong? I don't think it's a big deal, but I can't seem to find it. Thanks!

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  • How to delete data from multiple tables in sqlite?

    - by diana
    I am using sqlite database to store data. I have three tables: Invoice, InvRow, Invdetails. Relationsip between the tables are: Invoice.Id = InvRow.InvId InvRow.Id = Invdetails.RowId I need to delete related entries from three tables using a single query. How can I do that? Any help?

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  • C++ errors not shown in Visual Studio C# project

    - by Diana
    I have in Visual Studio 2008 a .NET 3.5 C# project that uses a dll compiled from a C# project (let's call it dll A). Dll A is using on his turn some C++ libraries. The problem is that when I encounter an error while calling objects from dll A, the application just closes, without showing any error. But I need to know what's the problem, I cannot just guess and go blind all along the project with this... I checked Window's event log, could not find anything. I checked the settings of throwing errors in Visual Studio, in menu Debug - Exceptions, all of them are checked (including C++ exceptions), so, any errors should be thrown. My code looks something like this: tessnet2.Tesseract tessocr = new tessnet2.Tesseract(); tessocr.Init(@"s:\temp\tessdata", "eng", false); tessocr.GetThresholdedImage(bmp, Rectangle.Empty).Save("s:\\temp\\" + Guid.NewGuid().ToString() + ".bmp"); List<tessnet2.Word> words = ocr.DoOCR(bmp, "eng"); //App exits at this line If I put in my code something like int x = Convert.ToInt32("test"); this should throw an error. And it throws, and Visual Studio shows it. Does anyone having any idea why the errors are not being shown? Or where else could be registered? Any help is very appreciated! Thanks!

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  • Create a bitonal image for OCR using Image Magick

    - by Greg
    nice /usr/local/bin/convert -colors 2 -colorspace gray -compress group4 /var/www/html/uploads/pokemon.jpg /var/www/html/uploads/pokemontest.jpg This command worked with a really OLD version of Image Magick. With the newest version this method produces a completely black image. nice /usr/local/bin/convert -colorspace gray -compress group4 /var/www/html/uploads/pokemon.jpg /var/www/html/uploads/pokemontest.jpg nice /usr/local/bin/convert -colors 2 /var/www/html/uploads/pokemontest.jpg /var/www/html/uploads/pokemontestfinal.jpg This results in a bitonal gray and black image, but it's really rough. NOT clean at all.

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  • Sound does not working in Device

    - by diana
    In my app i write for record NSArray *filePaths = NSSearchPathForDirectoriesInDomains (NSDocumentDirectory, NSUserDomainMask, YES); NSString *recordingDirectory = [filePaths objectAtIndex: 0]; NSString *resourcePath = [recordingDirectory stringByAppendingString:@"/sound.caf"]; self.soundFileURL = [NSURL fileURLWithPath:resourcePath]; AVAudioSession *audioSession = [AVAudioSession sharedInstance]; audioSession.delegate = self; [audioSession setActive: YES error: nil]; [[AVAudioSession sharedInstance] setCategory : AVAudioSessionCategoryRecorderror: nil]; NSDictionary *recordSettings = [[NSDictionary alloc] initWithObjectsAndKeys: [NSNumber numberWithFloat: 44100.0], AVSampleRateKey, [NSNumber numberWithInt: kAudioFormatAppleLossless], AVFormatIDKey, [NSNumber numberWithInt: 1], AVNumberOfChannelsKey, [NSNumber numberWithInt: AVAudioQualityMax], AVEncoderAudioQualityKey, nil]; AVAudioRecorder *newRecorder = [[AVAudioRecorder alloc] initWithURL: soundFileURL settings: recordSettings error: nil]; [recordSettings release]; self.soundRecorder = newRecorder; [newRecorder release]; soundRecorder.delegate = self; [soundRecorder prepareToRecord]; [soundRecorder record]; recording = YES; I write for stop recording [soundRecorder stop]; recording = NO; self.soundRecorder = nil; I write for play AVAudioPlayer *newPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL: self.soundFileURL error: nil]; [fileURL release]; self.player = newPlayer; [newPlayer release]; [player prepareToPlay]; [player setDelegate: self]; [button setTitle : @"Pause"forState: UIControlStateHighlighted]; [button setTitle : @"Pause"forState: UIControlStateNormal]; [player play]; In iPhone Simulator all ok I record then stop then play and all work fine. But in my iPhone device no sound. Any help will be greatly apprecieated

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  • Microsoft Speech Recognition in web service

    - by Diana
    I'm trying to use the System.Speech.Recognition namespace for recognizing speech in a web service. Actually, the WS calls a dll that uses this namespace. The problem is that...I can't. First, I had a Access denied error. After changing the Identity of my application pool to LocalSystem (security break, I know), that disappeared. But a timeout appeared. I receive no error, but no response either. I did some tests, and, the same code (very simple) that I use for recognizing the text in a WAV returns the answer in around 2 seconds, when integrated in a desktop application, but hangs and does nothing in a web application. I think I'm missing something... I'm not supposed to use System.Speech.Recognition in a web application? Am I supposed to use something else? Any help is greatly appreciated. Thank you!

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  • How to achieve the recessed text style as in Apple's Messages for Mac?

    - by Thruth
    I'd like to replicate the recessed text style of Messages/iMessage, or, the text "white-shadow" style on a light gray background. Please refer to an image here for the style I desire. As you can see, the texts are with "white-shadow" even on the light gray background. The bold texts do have subpixel rendering while the gray texts don't (by design?). I've tried setBackgroundStyle:NSBackgroundStyleRaised . However it was generating shadows darker than the background. setBackgroundStyle:NSBackgroundStyleLowered was worse that it even overrode my font colour setting. So, what is the right way to do this? Any tricks or just have to subclass NSTextFields ? Thanks.

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