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• Should DKIM signing happen in the application or the MTA?

  - by thomasrutter

  I'm trying to weigh up whether DKIM signing should be done by the application sending mail (for instance, the mailing list software you're using) or at the mail transfer agent (sendmail, postfix etc). Do you know any good arguments either way? As far as I can see, doing it at the MTA, such as with dkim-milter, is a lot easier to set up. However, if anyone gets access to the server, even just a normal unprivileged account such as a web hosting client's login, they'd be able to send email using sendmail and get the full blessing of my DKIM signature. What do you think is the best solution for my situation? I'm using a Debian server with apache, postfix, php&mysql, etc.

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• Does static damage computer speakers?

  - by incarna

  I recently got a new pair of Klipsch Promedia 2.1's for my laptop. I unplug my laptop a lot to take it around but today the audio plug touched my plug for my monitor and a bit of static came out of the speakers. I've heard some rumors that static can damage speakers but I've never investigated this problem myself since I previously used a desktop and never unplugged them. The volume was at a normal volume- am I just being paranoid? Or could having the speaker port touching other bits of metal damage my speakers?

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• MySQL-5.5.10 - Lost connection to MySQL server during query (Both Web Clients and MySQL Slaves)

  - by kwiksand

  We've just upgraded our existing MySQL5.1 DB servers to newer (much better) hardware with MySQL 5.5, and things have been going mostly smoothly for almost 6 weeks. Just the last few days, I've noticed a few errors, such as: From a MySQL Slave: [ERROR] Error reading packet from server: Lost connection to MySQL server during query ( server_errno=2013) Or From Apache/Other: Lost connection to MySQL server at 'reading initial communication packet', system error: 110 At one point this evening, many webnodes reported this error for a three minute period (many such reports as this was in a busy period). However, the issues don't appear to correspond with any times of extreme load. For all intents and purposes, the connection/thread load on MySQL is at a normal rate (between about 10 and 40 connected threads), and Web load has been a LOT higher at times over the last few weeks. Could there bee other reasons for these connection errors, that I'm not seeing?

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• "Snapping" when in RDP

  - by Paul

  I am using mstsc.exe version 6.0 (Remote Desktop non-Metro version) from an XP machine and cannot get Windows 8 snapping to work. I can drag a metro app window to the left or right, but it doesn't stick, it just bounces back to full screen. The snap bars do not appear. The client PC has two monitors, each with a resolution of 1280x1024. While mstsc.exe 6.0 does have an option to use both monitors simultaneously in normal settings, I am launching it with spanning enabled: mstsc.exe /span So the effective resolution in the session is 2560x1024. Is there a trick to getting this to work over RDP?

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• Type Chinese with French keyboard

  - by SoftTimur

  I use a Mac with French keyboard, and I have installed a Windows 7 as virtual machine. Now I would like to type Chinese in this Windows 7. The normal input method for Chinese within Windows 7 allows me to input Chinese, but does not work perfectly, because it does not recognize I am using a French keyboard - it presumes I am using a English keybord... So for some keys, what I type on the keybord is not what the input method gives on the screen... Could anyone help on this?

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• On booting my laptop warns me about failure of hard disk is imminent...can it be repaired or to be replaced..?

  - by nrb

  when I am booting my laptop (Lenovo G550) it gives an error message prior to that.. SMART Failure Predicted on Hard Disk O:Hitachi HTS543225l9A300-(PM) Warning : Immediately back up your data and replace your hard disk drive. Afailure may be imminent. Press F1 to continue.. Once it started, it runs smoothly, I also verified its status by running some internal HDD tests by Hard Disk Senitel software..It shows no bad sector , no virus, no damage , normal temperature ... it suggests every thing is OK except its health... Now my question is that then what is the wrong with it..? It may be wrong with plates (dusty) or the read/write heads...then can I go for repair it or replace it...? My system now reminds me every half an hour to resolve this problem since last 10 days... Help me.

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• Why is my firewall preventing me from accessing some websites

  - by nosx

  I have an old Belkin router and when I enable the firewall I cannot access certain websites. For example: http://www.avisynth.org With Firewall Enabled: Main page loads and begins to do a meta refresh which never finishes. With Firewall Disabled: Main page loads and the meta refresh completes as normal and I am taken to the wiki page. I have not setup any rules in my firewall that would prevent this site from loading, yet it refuses to load unless I have the firewall disabled completely. My router has a hidden page with advanced settings on it for the firewall which I was able to acccess and take a screenshot of, but I did not want to mess with these values unless I absolutely have to do so: What might be causing this problem and how would I go about fixing it?

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• Microsoft DNS creating subdomain when adding address record

  - by dwdet

  Hello, When attempting to add a normal A record (which has so far always worked), the Microsoft dnsmgmt app in MMC is returning a successful creation message "The host record oneworld.mydomain.com was successfully created". However, after refreshing the zone, it displays a folder icon next to "oneworld" indicating a sub domain, i.e. it is not the A record dnsmgmt said it created successfully. This is really strange behavior that has never happened previously. We have tried this on two separate PCs and remote consoled into the primary DNS server and tried adding the same A record with the same results. Any help is appreciated.

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• Battery management of a Macbook

  - by darthvader

  I bought a Macbook Pro last week. I mostly use (and plan to use) it like a desktop with an external monitor. I use the system at least 15 hours a day. Now using the coconut battery application, I figured out that the capacity has the current capacity has reduced to 98% of the design capacity. I was wondering what is the best way to manage battery. Should it be always either charging or discharging Should it be plugged in all time. I barely get 2 hours and 30 minutes on battery. Is that normal? I run XCode, VMWare Fusion (for Visual Studio), Mail app, Chrome (5-10 tabs) and Itunes (mp3). The brightness is 60% on battery. I already did the calibration.

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• Why is windows 7 backup and restore utility using so much disc space?

  - by stuckey

  note: this is a reformation of a previous question, see: How exactly does the Backup and Restore utility in Windows7 work? I have per the task scheduler scheduled windows 7 backup and utility to run once a day. The amount of data I produce in a day is best measured in KiB yet, a few GiB of data is added to the backup destination set in the backup utility daily. Why is this? Is this due to this utility making what are called "normal" backups instead of "incremental" backups? If so, how can this setting be changed?

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• Can't assign software to non-admin account

  - by labyrinth

  I'm trying to deploy software on our domain using group policy, but I am only able to do so if the user is a member of a group with administrative privileges. We do not want to allow users to install programs generally, but do want to be able to assign/publish. The test program I'm using is originally a .msi file, and it installs fine for users in the administrators group. How can we assign/publish to normal users without opening up the ability to install whatever? Also, from what I've read, I believe I have correct permissions on the folder/share where the .msi files are stored. This is on Win2008R2 with Win7Pro clients.

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• Domain points me to some malicious URL and I can't get rid of it

  - by Legend

  Whenever I enter my URL into the browser, it keeps pointing me to http://fornax.myvnc.com/dev The URL doesn't even work and my antivirus doesn't complain about it so I am not sure what is happening. I logged into my domain manager at godaddy and it says that the nameservers are pointing to: NS46.DOMAINCONTROL.COM and I am not sure where this came from either because my hosting is with lunarpages whose nameserver is NS1.LUNARMANIA.COM I tried looking into my .htaccess and it is blank. My index.php was hijacked with some malicious code so I removed it completely. Everything is supposed to be normal now but still some kind of a redirection is taking place and am not sure where this is happening. Any suggestions?

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• ffmpeg open webcam using YUYV but i want MJPEG

  - by Pavel

  I need ffmpeg to open webcam (logitech c910) in MJPEG mode, because the webcam can give ~24 using MJPEG "protocol" and only ~10 fps using the YUYV. Can i choose between them using ffmpeg command line? xx@(none) ~ $ v4l2-ctl --list-formats ioctl: VIDIOC_ENUM_FMT Index : 0 Type : Video Capture Pixel Format: 'YUYV' Name : YUV 4:2:2 (YUYV) Index : 1 Type : Video Capture Pixel Format: 'MJPG' (compressed) Name : MJPEG My current command line: ffmpeg -y -f alsa -i hw:3,0 -f video4linux2 -r 20 -s 1280x720 -i /dev/video0 -acodec libfaac -ab 128k -vcodec libx264 /tmp/web.avi ffmpeg produces corrupted h264 stream when i record from webcam, but normal h264 strem when i record from x11grab. Another codecs (mjpeg, mpeg4) works well with webcam... But this is another story.

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• "broken" windows xp after disc replacement

  - by epeleg

  Windows xp pro OEM was installed on my machine, Disk was failing so I cloned it to a new disk (larger one). Now windows said that the hardware has changed significantly and I need to re-activate, and I would gladly do (got the product number on a sticker on the machine) - only that for running the activation process I need to be logged-in, but when I try to login it just automatically logs me out again :( I know my credentials are O.K. because I can connect to the machine remotely and also use sysinternals tools such as PsExec or PSList etc. on it from a remote machine by specifying user and pasword. Login via safemode does not work any differently then in normal mode... I tried to run rundll32.exe syssetup,SetupOobeBnk (as suggested in several places on the net) using PsExec but it did not seem to help... Is there any way out of this evil circle? [ can't log in because not activated - cant activate because not logged in ]

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• SSL Proxy: Forwarding without the encryption

  - by John

  I have a python application listening on port 9001 for HTTP traffic. I'm trying to configure Apache (or anything, really) to listen on port 443 for HTTPS connections, and then forward the connection, sans encryption, to port 9001 on the same machine. My application would then reply via the proxy, where the encryption would be reapplied, and returned to the client transparently. I'm not doing anything crazy with the site names and SSL certs, I have one public IP, one hostname, and one SSL cert. Stripping the encryption at the proxy doesn't seem to be a common requirement. Is what I'm asking for a normal requirement? Are there other concerns with this sort of configuration?

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• cassandra node discovery

  - by eQuiNoX__

  I just set up a 3 node system with ip addresses "192.168.0.101", "192.168.0.102", "192.168.0.103". I have set the seeds value on the configuration of all three machines as seeds: "192.168.0.101,192.168.0.102,192.168.0.103" However, on running nodetool on any of them, only the 103 machine gets discovered. node101:/opt/cassandra/apache-cassandra-0.8.5/bin# ./nodetool ring -h 192.168.0.101 Address DC Rack Status State Load Owns Token 192.168.0.103 datacenter1 rack1 Up Normal 151.96 KB 100.00% 38174485210079977599903748344879358256 Could someone tell me where the problem lies?

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• Stripping a spike from rrdtool when removespike.pl doesn't find any

  - by raccettura

  I know when rrdtool graphs (using rrdtool 1.4) network traffic and the host is restarted a spike is a pretty normal thing to see. In the past I've just run that removespike.pl script that is hosted by the author and it strips the spike and I'm good to go. The last few times I've rebooted removespike.pl finds no spikes, but it's obvious that there are spikes. So my question is, how can I easily remove these spikes and get my graphs usable again? Right now it's so skewed it's meaningless.

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• How to restore default iPod playlists on Amarok?

  - by obvio171

  I wanted to "reset" the collection on my iPod and ended up accidentally deleting, through Amarok, all the playlists, including the default ones like "Most Played" and "Highest Rated". Since these are dynamic playlists with a special meaning for iPod, I don't think creating new, normal playlists with the same name will bring their special behavior back. How do I restore them with the same dynamic functionality? Is there a way to do that on Amarok? Rhythmbox? GTKPod? Command line? P.S.: not entirely sure what the policy about iPod questions are, but this one in particular seems to me to be very computer-related because, although it's about interfacing with a device, everything has to be done on my computer, using standard PC libraries/programs, etc. If it's still off-topic, please point me to where I could post it.

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• Where is the bottleneck?

  - by jsymon

  There is a limit on connections somewhere along the line here... On a windows server 2008 machine, each request to a url running on localhost takes ~3 seconds to complete. This is fine and normal for the url. However, if i open the same localhost url in about 10 tabs, and set them to reload all at the same time, they finish sequentially, 3 seconds after each other. Meaning the last tab has taken 30 seconds to load (3s x 10). What is especially odd is that firebug reports each page as taking 3seconds to load. Another point to add is that the status bar just sits at 'done' for the last tab until 3 seconds before completing, where it then changes to 'waiting for localhost'. I am praying there is some connection limit somewhere otherwise this would be a disaster if more than one user ever visited the site at a time! Maybe a limit or something where one pc cant make more than 2 simultaneous requests to a url at a given time?

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• ubuntu-10.04-desktop-i386 does not work with HTTP preseed?

  - by netvope

  Installation media: ubuntu-10.04-desktop-i386.iso I tried a lot of different boot parameters, but either the installer ignored the preseed configuration, or it boot itself directly as LiveCD. An example of the boot parameters I've tried: auto url=http://mydomain.com/path/preseed.cfg boot=casper only-ubiquity initrd=/casper/initrd.lz quiet splash -- If I remove only-ubiquity, it boots as a LiveCD. If I remove boot=casper, it won't boot. If I add vga=normal locale=en_US console-setup/layoutcode=us console-setup/ask_detect=false interface=auto, it still can't do automatic install. If I remove auto, it's the same. What is the correct boot parameters for launching such an installation? From the apache log of the server hosting preseed.cfg, I see that the installer has no problems fetching the preseed file. My preseed file is almost identical to the one at https://help.ubuntu.com/10.04/installation-guide/example-preseed.txt. Moreover, I have run debconf-set-selections -c preseed.cfg to ensure that the preseed file is correct.

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• Redirected to piratenpartji.nl. What can I do?

  - by Luke

  a few hours ago, I found a link to Kickass Torrent, which is blocked in my country, Italy and went for it. The link worked just fine but wasn't able to save anything. I renounced and continued normal navigation. I then noticed that everytime I try to access some pages, for instance google.com (but not Google.it) I receive a warning from Chrome that I'm being redirected through piratenpartji.nl Since I found a similar topic here on 'superuser' I tried what was proposed in the solution, namely shutting down adblock and trying again or trying Incognito mode. Nevertheless, no result. I performed a search with both Avira and Spybot SD but except for a couple cookies from other origin nothing came up. What do you suggest I do? Thanks in advance, feel free to ask any info that might be necessary Luke

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• Win7 to Win7 Remote Desktop Not working, Xp to 7 working fine

  - by vlad b.

  Hello, I have a small home network and recently i tried to enable remote desktop for one of the pc's. I have a mix of Windows 7, Windows Vista and Xp runing alongside ubuntu, centos and others (some virtual, some real). I have a few Windows 7 pc`s that can be connected to using remote desktop from inside and outside the network (port redirects on routers, etc, etc) and some Xp ones. The trouble is when i tried to do the same thing to a Win7 laptop i discovered i can't connect to it from another win7 pc inside the home network. To sum it up Working: xp -- win7 not working: win7 -- win7 What i tried - disable and enable remote desktop (my computer - remote settings) - removing and adding users to the remote settings window - adding a new user to the machine, administrator or 'normal' user - checking the firewall settings on the machine and set 'allow' to remote desktop for both 'home/work' and 'public'networks Any tips on what should i do next? It displays ' .. secure connection' and after that the window with 'Your security credentials did not work' and it lets me try again with another user/password..

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• Virutal Machine loses network connectivity on Hyper V

  - by Chris W

  We're running a number of VMs on a 6 node failover cluster of blades using Hyper V. We have an intermittent issue (every few days at different times - not a fixed frequency) of VMs losing network connectivity. Console access to the VM suggests all is fine and the underlying blade has normal connectivity. To resolve the problem we either have to re-start the VM or, more usually, we do a live migration to another blade which fires up connectivity and we then migrate it back to the original blade. I've had 3 instances of this happen with a specific VM running on a particular blade however it has happened once with a different VM running on a different blade. All VMs and blades have the same basic setup and are running Windows 2008 R2. Any ideas where I should be looking to diagnose the possible causes of this problem as the event logs provide no help?

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• CPU Cooling with Heatsinks

  - by Jason Tzen

  I've constructed a server that uses 2 Xeon E5-2620 CPUs and per Intel's recommendation I'm in the process of ordering heatsinks for each and I'm slightly concerned about thermal management. The case I'm using is well ventilated (the Coolermaster Cosmos II) but I have a few concerns regarding the adequacy of the heatsinks recommended by the MB manufacturer (Supermicro CPU HeatSink SNK-P0048PS). As you can see these heatsinks come without a fan and I'm wondering if they can keep the Xeons within their normal temperature range... Due to the low volume of literature on the topic I wasn't able to find anything conclusive.

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• Problems installing Linux to IDE connected compact flash card

  - by mathematician1975

  I have been trying to install Ubuntu on some hardware (Netcom NC-499 board that contains a Vortex86DX processor). I am trying to install to a compact flash card attached to the board via an IDE adaptor, the aim being that the board will boot up and simply treat the compact flash like a normal hard drive. The processor vendor claims support for Ubuntu 10.04 but I am having problems installing it onto the card. I have been trying using a USB CD-ROM drive and the standard .iso image from the ubuntu site (md5 checksum works out fine so no problem there) but I have had no success at all. I have been able to do this with Ubuntu 8.04 but with no other version (9.04 and 10.04 desktop and alternative discs all fail). My question is what other options are available to me to try and install this? I have googled myself apart trying to find out but other than a few sites describing USB based installs using flash memory sticks for very specific hardware, I have found no useful info at all. Any suggestions will be gratefully received.

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