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• What other protocols must not be fire-walled for FTP to work?

  - by Chris

  my Netgear router randomly reset itself the other day loosing all of my config settings: DSL details, Firewall rules, the lot! So I set about restoring all of the details manually, but when it came to configuring the firewall I wanted improve the security by explicitly setting 'deny' rules for everything that I figured is 'non-essential', and (although not necessary) whilst I was at it I set explicit 'allow' for the 'essential' protocols. I'll admit now I didn't really know what I was doing and everything was just 'my best guess', but I enabled only DNS, HTTP, HTTPS, FTP, SFTP, TFTP with everything else blocked. This did not work for me as I could not access 99% of web sites (although strangely Google worked!), so I played around a bit more and found that (oddly) if I disabled just the explicit 'allow' rules then everything worked fine, for browsing anyway. Today I came to work on some web-sites via FTP and just could not get a consistent connection, it kept dropping out after a few files or being blocked by the server or simply not connecting. It would authenticate okay but then stop when retrieving the initial directory listing! e.g.: Status: Delaying connection for 1 second due to previously failed connection attempt... Status: Resolving address of ftp.domain.co.uk Status: Resolving address of ftp.domain.co.uk Status: Connecting to 123.123.123.123:21... Status: Connecting to 123.123.123.123:21... Status: Connection established, waiting for welcome message... Status: Connection established, waiting for welcome message... Response: 421 Too many connections (8) from this IP Error: Could not connect to server Status: Delaying connection for 5 seconds due to previously failed connection attempt... Response: 421 Too many connections (8) from this IP Error: Could not connect to server Status: Delaying connection for 5 seconds due to previously failed connection attempt... I've checked and re-checked the FTP settings (they worked before anyway), I have Googled the I.T. out of the various protocols that I have blocked in the fire-wall but none seem essential to FTP (other than FTP/SFTP etc. which I have passively enabled). I'm (clearly) no server engineer, or protocols / fire-wall expert so I was hoping that some one could maybe shed some light on why my FTP is failing. I've been wondering if I ought to be allowing BGP, BOOTP and/or IDENT (or any others)? What other protocols are required for FTP? Thanks in advance!

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• Checking the configuration of two systems to determine changes

  - by None

  We are standing up a replicant data center at work and need to ensure that the new data center is configured (nearly) identically to the original. The new data center will be differently addressed and named than the original and will have differing user accounts, but all the COTS, patches, and configurations should be the same. We would normally ghost the original servers and install those images onto the new machines, however, we have a few problematic pieces of COTS that require we install them outside of an image due to how they capture the setup of the network during their installation and maintain it within their configuration information (in some cases storing it in various databases). We have tried multiple times and this piece of COTS cannot be captured within a ghost image unless the destination machine will have an identical network setup (all the same IPs, hostnames, user accounts, etc across the entire network) as the original. In truth, it is the setup of these special COTS that I want to audit the most because they are difficult to install and configure in the first place. In light of the fact that we can’t simply ghost, I’m trying to find a reasonable manner to audit the new data center and check to see if it is setup like the original (some sort of system wide configuration audit or integrity check). I’m considering using something like Tripwire for Servers to capture the configuration on the source machines and then run an audit on the destination machines. I understand that it will still show some differences due to the minor config changes, but I’m hoping that it will eliminate the majority of the work. Here are some of the constraints I’m working under: Data center is comprised of multiple Windows and Linux machines of differing versions (about 20 total) I absolutely cannot ghost or snap any other type of image of these machines … at least not in their final configuration I want to audit the final configuration to ensure all of the COTS, patches, configurations, etc are installed and setup properly (as compared to the original data center) I would rather not install any additional tools on these machines … I’d much rather run it from a standalone machine or off a DVD Price of tools is important but not an impossible burden, however, getting a solution soon is important (I can’t take the time to roll my own tools to do this) For the COTS that stores the network information, I don’t know all of the places it stores the network information … so it would be unlikely I could find a way in the near future to adjust its setup after the installation has occurred Anyone have any thoughts or alternate approaches? Can anyone recommend tools that would be usable for system wide configuration audits?

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• mint linux, DVD drive keeps randomly being accessed. unsure how to find culprit

  - by juicebox

  I have a workstation with mint linux 12. It seems like the DVD drive on the machine keeps randomly "activating". By activating it makes noise, the light turns on, and it seems like it is checking if a disk is in it. At first I thought I was being hacked and someone/something was trying to check if I had media in the DVDRom drive. I ruled that out with netstat and rkhunter. I checked my logs and the only thing I can find that might help point out the problem are these repeated chunks in syslog: Mar 24 17:47:31 rich-MINT kernel: [ 9846.551422] ata2.00: cmd a0/00:00:00:08:00/00:00:00:00:00/a0 tag 0 pio 16392 in Mar 24 17:47:31 rich-MINT kernel: [ 9846.551424] res 51/40:01:00:00:00/00:00:00:00:00/a0 Emask 0x10 (ATA bus error) Mar 24 17:47:31 rich-MINT kernel: [ 9846.551427] ata2.00: status: { DRDY ERR } Mar 24 17:47:31 rich-MINT kernel: [ 9846.551433] ata2.00: hard resetting link Mar 24 17:47:32 rich-MINT kernel: [ 9846.868012] ata2.01: hard resetting link Mar 24 17:47:32 rich-MINT kernel: [ 9847.344054] ata2.00: SATA link up 1.5 Gbps (SStatus 113 SControl 310) Mar 24 17:47:32 rich-MINT kernel: [ 9847.344067] ata2.01: SATA link up 3.0 Gbps (SStatus 123 SControl 300) Mar 24 17:47:32 rich-MINT kernel: [ 9847.376118] ata2.00: configured for PIO0 Mar 24 17:47:32 rich-MINT kernel: [ 9847.393047] ata2.01: configured for UDMA/133 Mar 24 17:47:32 rich-MINT kernel: [ 9847.397046] ata2: EH complete and again Mar 24 17:55:28 rich-MINT kernel: [10323.633268] sr 1:0:0:0: ioctl_internal_command return code = 8000002 Mar 24 17:55:28 rich-MINT kernel: [10323.633270] : Sense Key : Aborted Command [current] [descriptor] Mar 24 17:55:28 rich-MINT kernel: [10323.633275] : Add. Sense: No additional sense information Mar 24 17:55:11 rich-MINT kernel: [10306.640009] ata2.00: link is slow to respond, please be patient (ready=0) Mar 24 17:55:16 rich-MINT kernel: [10310.840009] ata2.00: SRST failed (errno=-16) Mar 24 17:55:16 rich-MINT kernel: [10310.840016] ata2.00: hard resetting link Mar 24 17:55:16 rich-MINT kernel: [10311.160013] ata2.01: hard resetting link Mar 24 17:55:16 rich-MINT kernel: [10311.636061] ata2.00: SATA link up 1.5 Gbps (SStatus 113 SControl 310) Mar 24 17:55:16 rich-MINT kernel: [10311.636075] ata2.01: SATA link up 3.0 Gbps (SStatus 123 SControl 300) Mar 24 17:55:16 rich-MINT kernel: [10311.668122] ata2.00: configured for PIO0 Mar 24 17:55:16 rich-MINT kernel: [10311.684854] ata2.01: configured for UDMA/133 Mar 24 17:55:17 rich-MINT kernel: [10312.105473] ata2: EH complete (Copied from Pastebin - http://pastebin.com/YNDrnyzH) If any linux masters could take a quick look at these log outputs and help me understand what is going on , much appreciated.

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• PC monitors shut off and system hangs while playing 3D games, but sound continues - Diagnosis?

  - by Jon Schneider

  Two days ago, I started running into a problem with my Windows PC: The PC's two connected monitors simultaneously lose signal and go black (as though the PC had been powered off). The keyboard's Numlock, Capslock, and Scroll Lights will become "stuck" in their current positions, as though the PC is hung. (For example, the Numlock light on the keyboard remains lit regardless of me pressing the Numlock key repeatedly.) No keyboard input does anything. (Ctrl+Alt+Del, Ctrl+Shift+Esc, Ctrl+C, etc.) However -- Whatever sound/music the PC was playing continues to play, and the PC's fans continue running, so the PC hasn't powered itself off or rebooted itself. Opening up the case, the graphics card is pretty hot to the touch. I had this happen 3 times in one evening. In all cases, I was playing a game with 3D graphics when the problem occurred (Torchlight, Minecraft, Magic: The Gathering 2012, Avadon: The Black Fortress demo). I have yet to have the problem happen when I'm not playing a game. This system has been running stable for about 2.5 years prior to this. I didn't make any changes to the system prior to the problem starting to occur. System specs: OS: Windows 7 64-bit Processor: Intel Core 2 Duo E7200 Wolfdale 2.53GHz Video Card: XFX GeForce 9800 GT 512 MB Motherboard: Foxconn P45A-S LGA 775 Intel ATX RAM: Corsair 4 GB (2x 2GB) DDR2-800 (PC2 6400) Full specs: New PC 2008 Troubleshooting tried so far (the problem occurred again after taking each of these steps, one at a time): Updated the video drivers with the latest drivers from NVidia's site. Opened up the case and cleaned out the video card and processor fans (both were pretty dirty). Installed and ran temperature monitor software. The processor idles at about 50 degrees C, and goes up to about 63 degrees C while playing a game (seems on the warm side, but not excessively so?). The software wasn't able to report the temperature of the GPU -- not sure this particular GPU supports software temperature readout? My initial diagnosis is that maybe the GPU is on its last legs (given that it seems to be running pretty hot, and the problem only occurs while playing 3D games). Does this seem likely? Or is it likely that this problem is caused by the processor, RAM, or motherboard? Or could this be a software issue of some kind? Thanks for any advice!

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• Hyper-V causes boot loop/failure on a non-Gigabyte Win8 Pro system

  - by Nick

  Hardware: Intel i7 2600K (not overclocked, SLAT compatible, virt. features enabled in bios) Asus Maximus IV Extreme-Z (Z68) 16Gb RAM 256Gb SSD Other non-trivial working parts Adding Hyper-V is causing a boot loop resulting in an attempt at automatic repair by Windows 8 after the second or third loop: I'm trying to get the Windows Phone 8 SDK installed and I've narrowed down my troubles to the Hyper-V feature in Win8. This is required to run the WP8 emulator and there are no install options to omit this feature. My first attempt completely borked the OS as I did not have a recent restore point or system image, so I did a completely clean install and made plenty of backups/restore points. I skipped the SDK install and went straight for the windows feature add-on for Hyper-V. This confirmed that Hyper-V is the issue as the same behavior resulted. I cannot find any hint in the Event Logs. Cancelling automatic recovery causes the same behavior to repeat. I don't have any other VM products installed. My only recourse is to use a restore point, try something else, install it again, and see what happens. No luck so far. I'm on my 10th attempt here. Any help would be much appreciated. EDIT: I found a collection of tips here.. http://social.msdn.microsoft.com/Forums/en-US/wptools/thread/b06cc9f2-aa5e-4cb3-9df1-0c273e1dfd68 So i've been attempting various bios settings to resolve this issue with no luck. I've tried setting 'CPUID Limit' to disabled. This seems to work partly as Win8 boots but no USB devices work at all. I also attempted disabling the usb 3.0 controller as the msdn topic lists an issue with USB controllers on Gigabyte boards. This also doesn't work. The USB devices light up but no input is received by the OS. All of my other bios CPU settings are in line with the info in the post. I'm totally stumped. Bios screenshots: http://i.imgur.com/yKN5u.png http://i.imgur.com/Y9wI4.png http://i.imgur.com/F6EuO.png

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• Powershell Exchange script returning inconsistent results - PS weirdness

  - by Ian

  Maybe someone can shed some light on a bit of Powershell weirdness I've come across and can't explain. This PS script returns a list of exchange databases, their sizes and the number of mailboxes in each one: Get-MailboxDatabase | Select Server, StorageGroupName, Name, @{Name="Size (GB)";Expression={$objitem = (Get-MailboxDatabase $_.Identity); $path = "`\`\" + $objitem.server + "`\" + $objItem.EdbFilePath.DriveName.Remove(1).ToString() + "$"+ $objItem.EdbFilePath.PathName.Remove(0,2); $size = ((Get-ChildItem $path).length)/1048576KB; [math]::round($size, 2)}}, @{Name="Size (MB)";Expression={$objitem = (Get-MailboxDatabase $_.Identity); $path = "`\`\" + $objitem.server + "`\" + $objItem.EdbFilePath.DriveName.Remove(1).ToString() + "$"+ $objItem.EdbFilePath.PathName.Remove(0,2); $size = ((Get-ChildItem $path).length)/1024KB; [math]::round($size, 2)}}, @{Name="No. Of Mbx";expression={(Get-Mailbox -Database $_.Identity | Measure-Object).Count}} | Format-table –AutoSize If I add a simple 'sort name' before the 'format-table' my resulting table contains blanks where the database sizes and number of mailboxes should appear (not zeros, blank empty space).... but only in some rows, not all rows. Some rows contain numbers! If I put the '|sort name| ' after the initial 'get-mailboxdatabase' it works fine. Whats even weirder is if I do the following: Execute the above command Add the sort before format-table Execute the new command Execute the initial command again What I see is different amounts in each of the three cases - all of which are incorrect. Yet 1 and 3 are the same command and the only difference with 2 is a sort. 1 and 3 should, at a minimum, return the same results. I get blanks where I should have MBs If I add the sort after the get-mailboxdatabase, it always returns identical results (as it should). Can anyone suggest an explanation as to what may be going on? If its of any help in reading the expression, I've reformatted it here to make it a bit more readable: Get-MailboxDatabase | Select Server, StorageGroupName, Name, @{Name="Size (GB)";Expression={ $objitem = (Get-MailboxDatabase $_.Identity); $path = "`\`\" + $objitem.server + "`\" + $objItem.EdbFilePath.DriveName.Remove(1).ToString() + "$" + $objItem.EdbFilePath.PathName.Remove(0,2); $size = ((Get-ChildItem $path).length)/1048576KB; [math]::round($size, 2) }}, @{Name="Size (MB)";Expression={ $objitem = (Get-MailboxDatabase $_.Identity); $path = "`\`\" + $objitem.server + "`\" + $objItem.EdbFilePath.DriveName.Remove(1).ToString() + "$" + $objItem.EdbFilePath.PathName.Remove(0,2); $size = ((Get-ChildItem $path).length)/1024KB; [math]::round($size, 2) }}, @{Name="No. Of Mbx";expression={ (Get-Mailbox -Database $_.Identity | Measure-Object).Count }} | Format-table –AutoSize

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• Expectations for NTFS file recovery

  - by Fred Hamilton

  Yesterday I booted my XP system, and as I looked up a minute later I saw the light blue screen and tail-end of that pre-boot diskcheck Windows sometimes does if it finds an error (or was previously told to run a diskcheck drung the next boot). I didn't worry about it at the moment... But then I looked at my "scratch" disk, which was a 70% full, 750GB hard disk...and it now looks like it has been freshly formatted. It doesn't have a single file on it, just the hidden "System Volume Information" file and 750GB of freedom from data. I looked at some of the recovery tools from the Free NTFS partition recovery question and decided to try PC INSPECTOR™ File Recovery 4.x initially. It ran overnight and afterwards returned a list of thousands of files it could recover. The odd thing was that the filenames were lost, but the file extensions were not (WTF?). And all of the files were exactly 1,472kB in size. I recovered a dozen PDFs as a test, and 80% of them displayed OK despite being padded out to 1.5MB (though I assume any files 1472kB are hosed). My primary question is: Is this the best I can expect from any file recovery software when trying to recover NTFS files? Or is there perhaps something better out there? I assume this is as good as it gets, but wanted to check in with the experts first. Bonus questions: What might have happened to my drive? I didn't intentionally format it. I've never seen a disk error cause the drive to suddenly become a clean, reformatted drive. Could some malicious/confused software have told my PC to format my disk on reboot? Is that even a function Windows XP has? Why can the file extensions be recovered but not the filename? Does NTFS really treat them as separate entities? I thought I had 8.3 naming turned off, but maybe that had something to do with it. Or maybe it looks at the data in the file and guesses the extension?

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• Computer experiencing slowdowns and lockups despite low cpu useage

  - by user157145

  my setup i5-2300 nvidia gtx 550 ti 6 gigs ram 600 w ocz modular psu recently reformatted and already experiencing drastic slowdown as soon as windows comes up, including repeated lockups with multiple various programs reporting that they are not responsive, then recovering after 10-30 seconds. ive checked memory and hard drive both of which come out fine. despite my plethura of worthless antiviral software im forced to assume that my illicit downloading practices have lead me into some comp trouble that i cant seem to determine. i have used ccleaner, search and destroy and malware bytes, all of which have found nothing to indicate what is causing this massive slowdown. in addition according to my resource manager my computer is operating at a load of only 30-50 percent CPU useage and 60 ram useage but taking 5-10 seconds to load files and open folders, and repeated lockups of multiple programs, especially firefox which seems to go unresponsive every 2-3 minutes. any help would be appreciated, i used a program called OTL by old timer, but cant make any sense of the results i was given. any help or suggestions would be appreciated, thank you for taking the time to read this i have avast but it didnt even find anything when i had it do a full system scan, so im thinking its clueless(also nortons, avg, and ad-aware). i also have mse but it has yet to complete a full scan it takes so long (i left it on last night but when i woke up my computer had a problem and had to restart). my hard drive has 300 gigs out of 1tb open and i already used hd tune pro, which said my harddrive was fine and its not a ssd. also im a noob at comps and only have the hd that is currently inside the computer in addition im not sure if studdering is the issue im suffering. my problem is that during my typing of these responses firefox has gone "not responsive" at least 5 times, each for times of about 5-10 seconds. when i try to control alt delete to bring up windows task manager it took 20 seconds. essentially its that my computer goes super slow at bringing up anything, or taking any action whatsoever that opens a program or file and has repeated incidents where i cant even click on whatever im trying to do because it locks up. the confusing thing about these incidents is that its right after restarting where there are minimal programs running and the computer and memory load is light.

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• Good maintained privacy Add-On/settings set that takes usability into account?

  - by Foo Bar

  For some weeks I've been trying to find a good set of Firefox Addons that give me a good portion of privacy/security without losing to much of usability. But I can't seem to find a nice combination of add-ons/settings that I'm happy with. Here's what I tried, together with the pros and cons that I discovered: HTTPS Everywhere: Has only pro's: just install and be happy (no interaction needed), loads known pages SLL-encrypted, is updated fairly often NoScript - Fine, but needs a lot of fine-tuning, often maintained, mainly blocks all non-HTML/CSS Content, but the author sometimes seems to do "untrustworthy" decission RequestPolicy - seems dead (last activity 6 months ago, has some annoying bugs, official support mail address is dead), but the purpose of this is really great: gives you full control over cross-site requests: blocks by default, let's you add sites to a whitelist, once this is done it works interaction-less in the background AdBlock Edge: blocks specific cross-site requests from a pre-defined whitelist (can never be fully sure, need to trust others) Disconnect: like AdBlock Edge, just looking different, has no interaction possibilities (can never be fully sure, need to trust others, can not interact even if I wanted to) Firefox own Cookie Managment (block by default, whitelist specific sites), after building own whitelist it does it's work in the background and I have full control All These addons together basically block everything unsecure. But there are a lot of redundancies: NoScript has a mixed-content blocker, but FF has it's own for a while now. Also the Cookie blocker from NoScript is reduntant to my FF-Cookie setting. NoScript also has an XSS-blocker, which is redundant to RequestPolicy. Disconnect and AdBlock are extremly redundant, but not fully. And there are some bugs (especially RequestPolicy). And RequestPolicy seems to be dead. All in all, this list is great but has these heavy drawbacks. My favourite set would be "NoScript Light" (only script blocking, without all the additonal redundant-to-other-addons hick-hack it does) + HTTPS Everywhere + RequestPolicy-clone (maintained, less buggy), because RequestPolicy makes all other "site-blockers" obsolete (because it blocks everything by default and let's me create a whitelist). But since RequestPolicy is buggy and seems to be dead I have to fallback to AdBlock Edge and Disconnect, which don't block all and and need more maintaining (whitelist updates, trust-check). Are there addons that fulfill my wishes?

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• How to start nginx via different port(other than 80)

  - by Zhao Peng

  Hi I am a newbie on nginx, I tried to set it up on my server(running Ubuntu 4), which already has apache running. So after I apt-get install it, I tried to start nginx. Then I get the message like this: Starting nginx: the configuration file /etc/nginx/nginx.conf syntax is ok configuration file /etc/nginx/nginx.conf test is successful [emerg]: bind() to 0.0.0.0:80 failed (98: Address already in use) [emerg]: bind() to 0.0.0.0:80 failed (98: Address already in use) [emerg]: bind() to 0.0.0.0:80 failed (98: Address already in use) [emerg]: bind() to 0.0.0.0:80 failed (98: Address already in use) [emerg]: bind() to 0.0.0.0:80 failed (98: Address already in use) That makes sense as Apache is using port 80. Then I tried to modify nginx.conf, I reference some articles, so I changed it like so: server { listen 8080; location / { proxy_pass http://94.143.9.34:9500; proxy_set_header Host $host:8080; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header Via "nginx"; } After saving this and try to start nginx again, I still get the same error as previously. I cannot really find a related post about this, could any good people shred some light? Thanks in advance :) ========================================================================= I should post all the content in conf here: user www-data; worker_processes 1; error_log /var/log/nginx/error.log; pid /var/run/nginx.pid; events { worker_connections 1024; # multi_accept on; } http { include /etc/nginx/mime.types; access_log /var/log/nginx/access.log; sendfile on; #tcp_nopush on; #keepalive_timeout 0; keepalive_timeout 65; tcp_nodelay on; gzip on; gzip_disable "MSIE [1-6]\.(?!.*SV1)"; include /etc/nginx/conf.d/*.conf; include /etc/nginx/sites-enabled/*; server { listen 81; location / { proxy_pass http://94.143.9.34:9500; proxy_set_header Host $host:81; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header Via "nginx"; } } } mail { See sample authentication script at: http://wiki.nginx.org/NginxImapAuthenticateWithApachePhpScript auth_http localhost/auth.php; pop3_capabilities "TOP" "USER"; imap_capabilities "IMAP4rev1" "UIDPLUS"; server { listen localhost:110; protocol pop3; proxy on; } server { listen localhost:143; protocol imap; proxy on; } } Basically, I changed nothing except adding the server part.

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• Laptop turning off when fan is spinning hard

  - by Ieyasu Sawada

  My laptop seems to have reach its lifespan. Its an Acer laptop so I guess that's normal. But I'd like to hear your opinions about this. My laptop is only 2 years old. I haven't heard the fan spinning like crazy not until these past 5 months. What I did: Hoping that its just the applications that I have installed that's consume the life of my laptop from the background. I used PC Decrapifier to uninstall some of the things that I don't need. Reformatted my computer but only the primary partition since my files are on the second partition. Bought a cooling pad. None of these works. I noticed the fan spins so hard when: I have a lot of browser tabs open. Full screen mode a flash video that I'm viewing online. Using VLC to watch encoded videos. There's this thing called minicoder http://sourceforge.net/projects/minicoder/ to reduce the size of videos without affecting much of the quality. I'm suspecting that it needs additional software(to make life easier for the hardware) even though the video is working fine in VLC. VLC consumes about 300,000K and above(as seen from task manager) while watching videos (.mkv). The problem: Laptop suddenly turns off when the fan spins like crazy for about 20 minutes. I'm always checking to see if its already too hot(using my fingers to feel the side of the laptop) but its not so I continued watching and then poof! computer turns off. Laptop won't turn on immediately when I turn it on after it turning off by itself. The light for the power goes on but its turns off immediately. I have to wait for about 10-20 seconds before it boots up without problems. So how do I go about this? Is this just normal for Acer laptops after about 2 years of heavy usage (8-12 hours a day)? My usage is heavy but I normally only have a text-editor(sublime) and browser open(chrome). Here's what I got from HW monitor:

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• UPS vs Solar Power in case of power failure for a server [on hold]

  - by Zen 8000k

  I am looking for a low power, low end pc able to run 24/7 without overheating and a way to support it in case of power failure. Power failures can be up to 72 hours. The pc dosen't need a monitor or keyboard. A modem must also be protected in case of power failure. When i say low end, i don't mean crap. The cpu needs to be x86 and have at least 1k cpu in this chart: http://www.cpubenchmark.net/index.php What's the best way to do this? EDIT: more info. I need to run a home server. The server will perform light tasks mainly. A x86 cpu sadly is the only route for my use. I want to be able to run the server and the router/modem in case of power failure. Now, regarding how long the power will fail: 1) 1 hours is OK for most situations. (say 90%) 2) 3 hours is OK (say 98%) 3) 6 hours is more thank OK. (say 99.5%) 4) On extreme cases the power might fail days. I believe this is very unlikely to happen. More is great but, really, how ofter power will fail more than 3 hours? I believe once every year at best. Well, that's too rare to care about. Given the above, I am looking for a cost effective way to archive 1-3 hour power or 6 hour if possible. Solutions: You guys give me great ideas. 1) Power generator: no good as power will fail for 10 seconds before returning. Also I read online, "clean" power generators cost 1.5k+, so it's out of budged. Non clean generator might damage electronics, right? 2) Solar power: i don't know for sure about this. Sounds like a great idea, too good to be true, honestly. For only 200$ i get 100+w? What are the drawbacks here? 3) UPS: This seems to be the best. The only problem is the cost. Cost < 200$ = great 400$ = budged limit

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• Scientific Linux - mysql and apache fail to start on reboot

  - by Derek Deed

  Both mysqld and httpd fail to restart following a reboot of the server, although chkconfig --list shows both daemons set to on for run levels 2,3,4 & 5 All control is being exectuted via Webmin Reboot server – MySQl and Apache not running MySQL Database Server MySQL version 5.1.69 MySQL is not running on your system - database list could not be retrieved. ________________________________________ Click this button to start the MySQL database server on your system with the command /etc/rc.d/init.d/mysqld start. This Webmin module cannot administer the database until it is started. Apache Webserver Apache version 2.2.15 Start Apache Search Docs.. Global configuration Existing virtual hosts Create virtual host Select all. | Invert selection. Default Server Defines the default settings for all other virtual servers, and processes any unhandled requests. Address Any Port Any Server Name Automatic Document Root /var/www/drupal Virtual Server Processes all requests on port 443 not handled by other virtual servers. Address Any Port 443 Server Name Automatic Document Root /var/www/drupal Select all. | Invert selection. chkconfig --list mysqld mysqld 0:off 1:off 2:on 3:on 4:on 5:on 6:off chkconfig --list httpd httpd 0:off 1:off 2:on 3:on 4:on 5:on 6:off Manually Restart Apache chkconfig --list httpd httpd 0:off 1:off 2:on 3:on 4:on 5:on 6:off Manually Restart MySQL chkconfig --list mysqld mysqld 0:off 1:off 2:on 3:on 4:on 5:on 6:off Everything now running okay; but no difference in the chkconfig outputs above. I tried: chkconfig --levels 235 httpd on /etc/init.d/httpd start and the same for mysqld but no change in operation. Log files show that the shutdown has been completed successfully; but there is no indication of the service restarting until it is executed manually: 131112 13:59:15 InnoDB: Starting shutdown... 131112 13:59:16 InnoDB: Shutdown completed; log sequence number 0 881747021 131112 13:59:16 [Note] /usr/libexec/mysqld: Shutdown complete 131112 13:59:16 mysqld_safe mysqld from pid file /var/run/mysqld/mysqld.pid ended 131112 14:09:52 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql 131112 14:09:52 InnoDB: Initializing buffer pool, size = 8.0M 131112 14:09:52 InnoDB: Completed initialization of buffer pool And the Apache logs: [Tue Nov 12 13:59:13 2013] [notice] suEXEC mechanism enabled (wrapper: /usr/sbin/suexec) [Tue Nov 12 13:59:13 2013] [notice] Digest: generating secret for digest authentication ... [Tue Nov 12 13:59:13 2013] [notice] Digest: done [Tue Nov 12 13:59:14 2013] [notice] Apache/2.2.15 (Unix) DAV/2 PHP/5.3.3 mod_ssl/2.2.15 OpenSSL/1.0.0-fips configured -- resuming normal operations [Tue Nov 12 13:59:14 2013] [notice] caught SIGTERM, shutting down [Tue Nov 12 14:27:13 2013] [notice] suEXEC mechanism enabled (wrapper: /usr/sbin/suexec) [Tue Nov 12 14:27:13 2013] [notice] Digest: generating secret for digest authentication ... [Tue Nov 12 14:27:13 2013] [notice] Digest: done [Tue Nov 12 14:27:13 2013] [notice] Apache/2.2.15 (Unix) DAV/2 PHP/5.3.3 mod_ssl/2.2.15 OpenSSL/1.0.0-fips configured -- resuming normal operations Is anyone able to shed any light on this problem?

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• Local Apache on Windows XP not finishing page requests

  - by asgeo1

  I have Apache 2.2.11 installed locally on my Windows XP (SP3) dev machine, which I setup about 3 months ago. I have just started having a strange problem in the last few week. Apache is serving some basic PHP applications like phpMyAdmin. When I make a page request, Apache appears to not finish serving all resources for that page. Firefox shows the "Transferring data from servername..." message, and the page never completes. The same problem happens in Internet Explorer too. I can sometimes tell which resource it is waiting on, because most of the page will render except for some image or similar resources. (Not sure why Firebug doesn't show this) It doesn't have the problem every page request - for page requests where most of the resources are cached in my browser, the page request will work with no problems. Or pages that are very light will work with no problems. However, if I "hard" refresh the page, I will have this problem (probably because it is requesting all page resources) Does anyone know what this could be? It is so strange that it has only just started happening - and I did not make any changes to my system (that I am aware of) I tried playing with the Apache ThreadsPerChild setting, but it did not seem to make a difference. UPDATE: I have been doing some more tests. I have been serving the most basic of pages, just a plain HTML file: <html> <body> <h1>testing</h1> </body> </html> If I request this page multiple times in a row, AND each request occurs immediately after the previous has completed, then 50% of the time the request will time out. However, if I put a 1-2 second gap between requests, then there is no problem. This correlates to what I have observed when the brower requests a real application page. When the browser has nothing cached, then all of the page resources are requested from the browser in a short amount of time - this appears to trigger the problem. UPDATE2: Nathan Long has helped me understand the issue a little better with the server-status page (see below). It is weird, it is like the server has a hickup sending data to the client. The client sits there waiting forever for data that never arrives. Closing the client process does not terminate the connection on the server - the server still has active threads for each previously attempted connection, but they just sit there - not sending any data and never terminating. (even though the client is now closed) Only a restart of the server seems to terminate them.

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• Event ID 17890 (A significant part... paged out.) with SQL Server 2008

  - by Godeke

  I have a machine that has SQL Server 2008 Standard installed. Periodically (about once an hour) I am getting Event ID 17890 several times in a row. An example: 6:28:54 "A significant part of sql server process memory has been paged out. This may result in a performance degradation. Duration: 0 seconds. Working set (KB): 10652, committed (KB): 628428, memory utilization: 1%%. 6:34:27 "A significant part of sql server process memory has been paged out. This may result in a performance degradation. Duration: 332 seconds. Working set (KB): 169780, committed (KB): 546124, memory utilization: 31%%." 6:38:55 "A significant part of sql server process memory has been paged out. This may result in a performance degradation. Duration: 600 seconds. Working set (KB): 245068, committed (KB): 546124, memory utilization: 44%%." This pattern repeated at 7:26 - 7:37, 8:26 - 8:36, 9:24 - 9:35 and so with the same increasing working set and memory utilization pattern. I don't have any (known) background tasks running at this time. Backups run at 2:00 This subsided from 11:00 at night until it resumed at 4:00 in the morning and has been continuing the intermittent 10 minute glitch periods. As this server has plenty of RAM (the commit charge has peaked at 2,871,564 of 4,194,012 physical) I disabled the paging files after reading several items I dug up searching Google and not finding any of them changing the situation. This pattern I am documented is after removing the paging files, so I'm not even sure where we are paging the SQL process could be going. I also changed the SQL process memory to have a minimum of 500MB and a maximum of 2GB of RAM (as this is a light duty database server serving only a small workgroup). Has anyone encountered this? Prior to disabling the page files this error would cause 5 minutes of disk thrashing that disabled access to the databases, files, IIS webs and so on. Since disabling the page files it just logs strange things, but I'm not seeing a performance drop at least. Any suggestions would be welcome.

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• Poor performance of single processor 32bit Windows XP xompared SMP in VBA+Excel

  - by Adam Ryczkowski

  Welcome! On many computers I experienced poor performance of 32 bit guests running on 64 bit Linux host (I used only the Debian family). At last I managed to collect benchmark data. I made the benchmark by running custom VBA macro, (which we use in our company) that generates 284 pages long Word document full of Excel Pie charts, tables and comments. The macro is run as a single task (excluding the standard services) on a set of identically configured Windows XP 32-bit systems. I measured the time (in sec.) needed to perform the test. The computer (i.e. my notebook Asus P53E) supports both VT-d extensions and native Windows XP. It has 2-core processor, each core is hyperthreaded, so in total we have 4 mostly independent execution units. I use the latest VirtualBox 4.2 and VMWare Workstation 9.0 for Linux, installed together on the same host (running Mint 13 Maya) but never run simultaneously. The results (in column Time) are no less accurate than ± 10% Here are the results (sorry for the format, but I couldn't find out a better solution for tables in SO): +---------------+-------------+------------------------------------------------------+---------+------------+----------------+------+ | Host software | # processor | Windows kernel | IO APIC | VT-x/AMD-V | 2D Video Accel | Time | +---------------+-------------+------------------------------------------------------+---------+------------+----------------+------+ | VirtualBox | 1 | Advanced Configuration and Power Interface (ACPI) PC | 0 | 1 | 0 | 1139 | | VirtualBox | 1 | Advanced Configuration and Power Interface (ACPI) PC | 0 | 1 | 1 | 1050 | | VirtualBox | 1 | Advanced Configuration and Power Interface (ACPI) PC | 0 | 0 | 1 | 1644 | | VirtualBox | 4 | ACPI Multiprocessor PC | 1 | 1 | 1 | 6809 | | VMWare | 1 | ACPI Uniprocessor PC | | 1 | 1 | 1175 | | VMWare | 4 | ACPI Multiprocessor PC | | 1 | 1 | 3412 | | Native | 4 | ACPI Multiprocessor PC | | | | 1693 | | Native | 1 | Advanced Configuration and Power Interface (ACPI) PC | | | | 1170 | +---------------+-------------+------------------------------------------------------+---------+------------+----------------+------+ Here are the striking conclusions: Although I've read in the VirtualBox fora about abysmal performance with 32-bit guest on 64-bit host, VMWare also has problems compared to native run, still being twice faster(!) than VBox. Although VBA is inherently single-threaded, the Excel calculations, which take much more than a half of total computation time, supposedly aren't. So one would expect some speed gain when running on 2+ cores ("+" for hyperthreading). What we see is a speed loss. And quite big one too. For the VirtualBox the VT-d extension isn't a big deal. Can anyone shed some light on why the singlethreaded Windows kernel is so much faster than the SMP one?

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• How to enjoy DVD on Apple iPad

  - by user44251

  I believe many people spent a sleepless night yesterday waiting for the new Apple Tablet to come, just a few days ago or perhaps longer I noticed fierce debate about it, its name, size, capacity, processor, main features, price etc. And now, they can take a long breath with the new Apple Tablet named iPad officially released on 28, January, 2010 (Beijing Time). But I know a new battle just begins. iPad, sounds somewhat like iPod and it really shares some similarities in terms of shape like smart, light and portable. It has a 9.7-inch, LED-backlit, IPS display with a remarkable precise Multi-Touch screen. And yet, at just 1.5 lbs and 0.5 inches thin, it's easy to carry and use everywhere. It can greatly facilitates your experience with the web, emails, photos and videos. Right now, it can run almost 140.000 of the apps on the Apple store. It can even run the apps you have downloaded for your iPhone or iPod touch. But so far, I haven't seen any possibility that it can work with DVD, probability there is no built-in DVD-ROM or DVD player which can play DVD directly. As Apple iPad states, the video formats supported are MPEG-4 (MP4, M4V), H.264, MOV etc and audio formats accepted are AAC, Proteceted AAC, MP3, AIFF and WAV etc, those are formats that are commonly used with iMac. This could really a hard nut to crack if you want to watch your favourite DVD on this magic Apple iPad. But don't worry, there is still way out, you just need a few steps for ripping and importing DVD movies to Apple iPad with a simple application DVD to iPad converter What's on DVD to iPad Converter for Mac DVD to iPad converter for Mac is a powerful and professional application designed for the newly released Apple iPad which can rip, convert your DVD contents to Apple iPad compatible MPEG-4 (MP4, M4V), H.264, MOV etc, and other popular file formats like AVI, WMV, MPG, MKV, VOB, 3GP, FLV etc can also be converted so that you can put on your portable devices like iPod, iPhone, iRiver, BlackBerry etc. Besides, it can also extract audio from DVD videos and save as MP3, AIFF, AAC, WAV etc. Mac DVD to iPad converter has also been enhanced that can run both on PowerPC and Intel (Snow Leopard included). It can offer versatile editing features which allows you to make your own DVD videos. For example, you can cut your DVD to whatever length you like by Trim, crop off unwanted parts from DVD clips by Crop, add special effect like Gray, Emboss and Old film to make your videos more artistic. Besides, its built-in merging feature and batch mode allows you to join several DVD clips into a single one and do batch conversion. And more features can be expected if you afford a few minutes to try.

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• How can I change how OS X's 'say' command pronounces a word?

  - by jwhitlock

  OS X's say command is useful for some tasks (such as Skype's 'notify me when a contact comes online), but it is pronouncing some names incorrectly. Is there a way to teach say to pronounce a word differently? For example, try: say "Hi, Joel Spolsky" The 'ol' sounds like 'ball' rather than 'old'. I'd like to add an exception that say "Pronounce Spolsky like this", rather than try to teach new linguistic rules. I bet there is a way since it can pronounce "iphone" as Apple wants. Update - After some research, here's what I've learned: Text-to-speech is split between turning the text to phonemes, and then the phonemes are turned into audio using a voice. Changing the voice doesn't effect the phonemes. The Speech Synthesis Manager has some functions for turning text to phonemes, and a method for registering a speech dictionary that will add new text-phoneme maps. However, Apple's speech dictionary must be in a binary form - I didn't find any plist XML. Using dtrace while running say, I found some interesting files opened in /System/Library/PrivateFrameworks/SpeechDictionary.framework/Resources. This is probably the speech dictionary, but they are all binary, except for Homophones, which is XML. Adding entries to Homophones does nothing - it is probably used in speech-to-text. They are also code signed by Apple - changing them may prevent some programs from working. PrefixDictionary CartNames CartLite SymbolDictionary Homophones There are ways to add text versions of application interface elements so VoiceOver works, a lot of which a developer gets for free, but there are tricky bits. The standard here appears to be to use a phonetic spelling as needed. My guesses are: say is a light layer of code on top of the Speech Synthesis Manager. It would be easy for the Apple devs to add a command line option to take the path to a speech dictionary plist for alternate phoneme mapping, but they didn't. It may be a useful open-source project to write a better say. Skype probably uses Speech Synthesis Manager directly, leaving no hooks to change the way my friend's names are pronounced, other than spelling them phonetically, which is silly. The easiest way to make a command line version of say is how JRobert suggested. Here's my quick implementation, using Doug Harris's spelling suggestion: #!/bin/sh echo $@ | tr '[A-Z]' '[a-z]' | sed "s/spolsky/spowlsky/g" | /usr/bin/say Finally, some fun command line stuff: # Apple is weird sqlite3 /System/Library/PrivateFrameworks/SpeechDictionary.framework/Resources/Tuples .dump # Get too much information about what files are being opened sudo dtrace -n 'syscall::open*:entry { printf("%s %s",execname,copyinstr(arg0)); }' # Just fun say -v bad "Joel Spolsky Spolsky Spolsky Spolsky Spolsky, Joel Spolsky Spolsky Spolsky Spolsky Spolsky" echo "scale=1000; 4*a(1)" | bc -l | say

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• Nvidia Drivers on Debian / Lenny (Stable) -> Installation successful -> Monitors gets black

  - by David

  I have successfully installed the proprietary drivers for my nvidia (geforce 7300 gt) graphics card on debian/lenny. I know its not the best way to chose for driver installation ( see this link: http://wiki.debian.org/NvidiaGraphicsDrivers#non-freedrivers ). but the two ways seem to be possible for me (nvidia-kernel module compilation). Now the problem is that the monitors gets black, the power light starts blinking after i launch the x-server. Have a short look a the logs (output truncated from /var/log/Xorg.0.log): (II) Setting vga for screen 0. (**) NVIDIA(0): Depth 24, (--) framebuffer bpp 32 (==) NVIDIA(0): RGB weight 888 (==) NVIDIA(0): Default visual is TrueColor (==) NVIDIA(0): Using gamma correction (1.0, 1.0, 1.0) (**) Jul 28 17:10:11 NVIDIA(0): Enabling RENDER acceleration (II) Jul 28 17:10:11 NVIDIA(0): Support for GLX with the Damage and Composite X extensions is (II) Jul 28 17:10:11 NVIDIA(0): enabled. (II) Jul 28 17:10:11 NVIDIA(0): NVIDIA GPU GeForce 7300 GT (G73) at PCI:1:0:0 (GPU-0) (--) Jul 28 17:10:11 NVIDIA(0): Memory: 262144 kBytes (--) Jul 28 17:10:11 NVIDIA(0): VideoBIOS: 05.73.22.25.00 (II) Jul 28 17:10:11 NVIDIA(0): Detected PCI Express Link width: 16X (--) Jul 28 17:10:11 NVIDIA(0): Interlaced video modes are supported on this GPU (--) Jul 28 17:10:11 NVIDIA(0): Connected display device(s) on GeForce 7300 GT at PCI:1:0:0: (--) Jul 28 17:10:11 NVIDIA(0): Samsung SyncMaster (CRT-0) (--) Jul 28 17:10:11 NVIDIA(0): Samsung SyncMaster (DFP-0) (--) Jul 28 17:10:11 NVIDIA(0): Samsung SyncMaster (CRT-0): 400.0 MHz maximum pixel clock (--) Jul 28 17:10:11 NVIDIA(0): Samsung SyncMaster (DFP-0): 165.0 MHz maximum pixel clock (--) Jul 28 17:10:11 NVIDIA(0): Samsung SyncMaster (DFP-0): Internal Single Link TMDS (II) Jul 28 17:10:11 NVIDIA(0): Assigned Display Device: CRT-0 (==) Jul 28 17:10:11 NVIDIA(0): (==) Jul 28 17:10:11 NVIDIA(0): No modes were requested; the default mode "nvidia-auto-select" (==) Jul 28 17:10:11 NVIDIA(0): will be used as the requested mode. (==) Jul 28 17:10:11 NVIDIA(0): (II) Jul 28 17:10:11 NVIDIA(0): Validated modes: (II) Jul 28 17:10:11 NVIDIA(0): "nvidia-auto-select" (II) Jul 28 17:10:11 NVIDIA(0): Virtual screen size determined to be 1280 x 1024 (--) Jul 28 17:10:11 NVIDIA(0): DPI set to (85, 86); computed from "UseEdidDpi" X config (--) Jul 28 17:10:11 NVIDIA(0): option (==) Jul 28 17:10:11 NVIDIA(0): Enabling 32-bit ARGB GLX visuals. (--) Depth 24 pixmap format is 32 bpp Here is the complete /etc/X11/xorg.conf file as generated by nvidia-xconfig: # nvidia-xconfig: X configuration file generated by nvidia-xconfig # nvidia-xconfig: version 256.35 (buildmeister@builder101) Wed Jun 16 19:25:59 PDT 2010 Section "ServerLayout" Identifier "Layout0" Screen 0 "Screen0" InputDevice "Keyboard0" "CoreKeyboard" InputDevice "Mouse0" "CorePointer" EndSection Section "Files" EndSection Section "Module" Load "dbe" Load "extmod" Load "type1" Load "freetype" Load "glx" EndSection Section "InputDevice" # generated from default Identifier "Mouse0" Driver "mouse" Option "Protocol" "auto" Option "Device" "/dev/psaux" Option "Emulate3Buttons" "no" Option "ZAxisMapping" "4 5" EndSection Section "InputDevice" # generated from default Identifier "Keyboard0" Driver "kbd" EndSection Section "Monitor" Identifier "Monitor0" VendorName "Unknown" ModelName "Unknown" Hor

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• Computer freezes +/- 30 seconds, suspicion on SSD

  - by Robert vE

  My computer freezes for about 30 seconds, this happens occasionally. When it happens I can still move the mouse, sometimes even alternate between tabs in google chrome. If I try to open windows explorer nothing happens. Also chrome rapports "waiting for cache". It also happens in starcraft II, during which the sounds loops. I have made a Trace as this topic describes: How do I troubleshoot a Windows 7 freeze or slowness? Trace: https://docs.google.com/open?id=0B_VkKdh535p6NklhSDdBLURUMnc I have looked at it, but I couldn't figure it out. My system specs are: AMD Athlon X4 651 Asus Ati HD6670 ADATA SSD sp900 Asus f1a55 mainboard 4 GB crucial 1333 ram 500 watt atx ps I'm running Windows 7, fully updated. Any help is much appreciated. Update: I tried something before your reply that may have helped the problem. I don't know for sure if it has, it's too soon to tell. A bit of history first. I had problems installing win7 on my ssd from the start. In IDE mode it worked, but I had the same problems as above. AHCI was a total fail, with it on before install as well as turning it on after install (including tweaking register). I didn't bother installing the AMD chipset/AHCI as it was reported to have no TRIM function and thus make problems worse. Eventually I did install the AMD SMbus driver as the stability issues were driving me crazy. It worked, no more issues, until I installed some extra drivers and software. Audio/LAN/ASUS suite, I don’t see the relation, but somehow it screwed up my system again. As a last effort I posted here on this site. After which the thought occurred to me turn on AHCI again as by now I had all necessary drivers installed anyway. (plus all windows updates downloaded/installed in the meantime) I did and stability didn’t seem great the first few reboots, but eventually everything seemed to work great. I tried to play starcraft II – an almost guaranteed freeze before – and I had no problems. I’m basically crossing my fingers and hope the problem is gone for good. I still think it has something to do with my SSD. In my research into the problem I noticed a lot of these issues with sandforce 2281 firmware, the exact same firmware I have. People reported the same problem that I had, freezes. Additionally they reported that during a freeze the hdd light stayed on, I noticed after I read this that this happened with my computer as well. None of this is conclusive evidence that my SSD is really to fault, but it is suspicious. And why turning on AHCI would fix it I don’t know. Thank you Tom for taking a look, if the problem returns I will certainly do what you advised.

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• Windows 7 Home hangs at "Welcome" screen

  - by White Phoenix

  I'm asking on behalf of a friend who's currently having problems with his machine. Windows 7 Home 32-bit. He's too far away for me to help by going over to his house - I'm helping him over the Internet. This is his current machine: http://www.newegg.com/Product/Product.aspx?Item=N82E16883227134 The only two changes he made to that machine is to swap out the gfx card for a EVGA GTX 460 and the PSU for a Corsair TX650. Here's what happened: He was playing a computer game (fairly CPU/GPU intensive) and had some music going in the background in foobar while playing. Suddenly, he notices the music stopped playing, so he switches to foobar to try to close it, but it freezes up (window won't respond). So he figures it's just foobar having a bad day and force quits that program. Suddenly, his game won't respond, so he force quits that, then the entire computer just went to crap at that point, so he hits the restart button on his machine. Computer POSTS fine, but now he gets stuck at the Windows "welcome" screen (his account is set to auto-login). HD activity light is solid yellow but he doesn't hear HDD activity. He tried booting into Safe Mode - gets stuck at the "welcome screen". Tried a STartup Repair within Windows 7, it found a few problems, but still gets stuck at welcome. I advised him to boot off the DVD - sfc /scannow found nothing (couldn't use the regular /scannow option; says there's a repair pending, had to use use offbootdir/offwindir command switches). Ran startup repair 3 times - found nothing. My friend runs virus/malware scans on a regular basis, so he's fairly sure it's not that either. Right now I'm having my friend run chkdsk /R on the computer while in this Startup Recovery mode - so far it's caught a few bad sectors. However at this point I'm kinda wondering which way to go if chkdsk doesn't fix it. Quick Google search said someone had success by booting Windows with bootlogging on - some others have success with running the aforemented chkdsk, etc. The fact that Windows cannot even boot into Safe Mode concerns me. While we're waiting for chkdsk /R to finish, are there any other options I can give my friend short of reinstalling Windows 7? He has his data on a separate partition so that's not a major problem (though it'll be an annoyance for him). I suspect his hard drive may be having some issues, but my main concern is getting him back up and running before we start diagnosing the hard drive (I may have him run some sort of SMART test utility later).

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• 40k Event Log Errors an hour Unknown Username or bad password

  - by ErocM

  I am getting about 200k of these an hour: An account failed to log on. Subject: Security ID: SYSTEM Account Name: TGSERVER$ Account Domain: WORKGROUP Logon ID: 0x3e7 Logon Type: 4 Account For Which Logon Failed: Security ID: NULL SID Account Name: administrator Account Domain: TGSERVER Failure Information: Failure Reason: Unknown user name or bad password. Status: 0xc000006d Sub Status: 0xc0000064 Process Information: Caller Process ID: 0x334 Caller Process Name: C:\Windows\System32\svchost.exe Network Information: Workstation Name: TGSERVER Source Network Address: - Source Port: - Detailed Authentication Information: Logon Process: Advapi Authentication Package: Negotiate Transited Services: - Package Name (NTLM only): - Key Length: 0 This event is generated when a logon request fails. It is generated on the computer where access was attempted. The Subject fields indicate the account on the local system which requested the logon. This is most commonly a service such as the Server service, or a local process such as Winlogon.exe or Services.exe. The Logon Type field indicates the kind of logon that was requested. The most common types are 2 (interactive) and 3 (network). The Process Information fields indicate which account and process on the system requested the logon. The Network Information fields indicate where a remote logon request originated. Workstation name is not always available and may be left blank in some cases. The authentication information fields provide detailed information about this specific logon request. - Transited services indicate which intermediate services have participated in this logon request. - Package name indicates which sub-protocol was used among the NTLM protocols. - Key length indicates the length of the generated session key. This will be 0 if no session key was requested. On my server... I changed my adminstrative username to something else and since then I've been inidated with these messages. I found on http://technet.microsoft.com/en-us/library/cc787567(v=WS.10).aspx that the 4 means "Batch logon type is used by batch servers, where processes may be executing on behalf of a user without their direct intervention." which really doesn't shed any light on it for me. I checked the services and they are all logging in as local system or network service. Nothing for administrator. Anyone have any idea how I tell where these are coming from? I would assume this is a program that is crapping out... Thanks in advance!

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• Both nginx and php5-fpm init.d startup scripts are non-functional and returning no errors..? But they used to work perfectly

  - by Ollie Treend

  I have been using nginx and php5-fpm on my Ubuntu box for a while now. Everything has been configured and setup correctly, and it ran like a charm. I have been keeping the packages updated & upgraded as usual, but haven't touched the nginx OR php5-fpm config files at all (thus I'm pretty sure this isn't my fault... ) Basically, I noticed nginx wasn't running as it should be. I ran the command sudo service nginx start, and the script did nothing. The same thing happens when trying to do anything - start, stop, restart or reload. This also happens for the "php5-fpm" init script - although all other init scripts seem to be functioning correctly. When trying to start nginx OR php5-fpm, this is what happens: root@HAL:/etc# service php5-fpm start root@HAL:/etc# I can't understand what is going wrong. The script isn't returning errors, but similarly it isn't starting the daemon or reporting success as usual. For reference, both installations are from the official nginx and php5-fpm PPAs. The fact that both started doing this at the same time has thrown me - since they are both unrelated packages. I have since purged both sets of packages from my system with apt-get purge ... and also apt-get remove --purge ... both of which have successfully removed the packages, their config files, and their init.d startup scripts. After having reinstalled nginx, I now have a functioning startup script again - I can start the web server as usual. However, php5-fpm is still experiencing the strange premature exiting of the startup script.. and I really can't figure out what's causing it. I have no idea what caused this to occur initially, but have managed to fix nginx. I now need to fix the php5-fpm startup script. If anybody could shed some light on this situation, I would be very grateful! The chances are both these issues are related - and they were caused by me doing something stupid. But now I need to fix it. This time I was lucky - because these problems are just on my development server. But I have 2 other live servers which are configured in a similar way, and I am worried the same thing will happen to these two as well! Has anybody else come across this? Do you have any words of advice? Thank you

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• Will spreading your servers load not just consume more recourses

  - by Saif Bechan

  I am running a heavy real-time updating website. The amount of recourses needed per user are quite high, ill give you an example. Setup Every visit The application is php/mysql so on every visit static and dynamic content is loaded. Recourses: apache,php,mysql Every second (no more than a second will just be too long) The website needs to be updated real-time so every second there is an ajax call thats updates the website. Recourses: jQuery,apache,php,mysql Avarage spending for single user (spending one minute and visited 3 pages) Apache: +/- 63 requests / responsess serving static and dynamic content (img,css,js,html) php: +/- 63 requests / responses mysql: +/- 63 requests / responses jquery: +/- 60 requests / responses Optimization I want to optimize this process, but I think that maybe it would be just the same in the end. Before implementing and testing (which will take weeks) I wanted to have some second opinions from you guys. Every visit I want to start off with having nginx in the front and work as a proxy to deliver the static content. Recources: Dynamic: apache,php,mysql Static: nginx This will spread the load on apache a lot. Every Second For the script that loads every second I want to set up Node.js server side javascript with nginx in te front. I want to set it up that jquery makes a request ones a minute, and node.js streams the data to the client every second. Recources: jQuery,nginx,node.js,mysql Avarage spending for single user (spending one minute and visited 3 pages) Nginx: 4 requests / responsess serving mostly static conetent(img,css,js) Apache: 3 requests only the pages php: 3 requests only the pages node.js: 1 request / 60 responses jquery: 1 request / 60 responses mysql: 63 requests / responses Optimization As you can see in the optimisation the load from Apache and PHP are lifted and places on nginx and node.js. These are known for there light footprint and good performance. But I am having my doubts, because there are still 2 programs extra loaded in the memory and they consume cpu. So it it better to have less programs that do the job, or more. Before I am going to spend a lot of time setting this up I would like to know if it will be worth the while.

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• What happens to missed writes after a zpool clear?

  - by Kevin

  I am trying to understand ZFS' behaviour under a specific condition, but the documentation is not very explicit about this so I'm left guessing. Suppose we have a zpool with redundancy. Take the following sequence of events: A problem arises in the connection between device D and the server. This causes a large number of failures and ZFS therefore faults the device, putting the pool in degraded state. While the pool is in degraded state, the pool is mutated (data is written and/or changed.) The connectivity issue is physically repaired such that device D is reliable again. Knowing that most data on D is valid, and not wanting to stress the pool with a resilver needlessly, the admin instead runs zpool clear pool D. This is indicated by Oracle's documentation as the appropriate action where the fault was due to a transient problem that has been corrected. I've read that zpool clear only clears the error counter, and restores the device to online status. However, this is a bit troubling, because if that's all it does, it will leave the pool in an inconsistent state! This is because mutations in step 2 will not have been successfully written to D. Instead, D will reflect the state of the pool prior to the connectivity failure. This is of course not the normative state for a zpool and could lead to hard data loss upon failure of another device - however, the pool status will not reflect this issue! I would at least assume based on ZFS' robust integrity mechanisms that an attempt to read the mutated data from D would catch the mistakes and repair them. However, this raises two problems: Reads are not guaranteed to hit all mutations unless a scrub is done; and Once ZFS does hit the mutated data, it (I'm guessing) might fault the drive again because it would appear to ZFS to be corrupting data, since it doesn't remember the previous write failures. Theoretically, ZFS could circumvent this problem by keeping track of mutations that occur during a degraded state, and writing them back to D when it's cleared. For some reason I suspect that's not what happens, though. I'm hoping someone with intimate knowledge of ZFS can shed some light on this aspect.

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