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• Logging Timeout'd Request in Apache 2.X

  - by m3rLinEz

  Hello, I am migrating some applications from Apache 1.3 to 2.2. We used to run some tests where attacker opens some HTTP connection to our server, and do nothing. Apache 1.3 would log the following 408 code, for example: 126.1.86.85 - - [01/Dec/2010:06:26:19 +0000] "-" 408 - "-" 0 126.1.86.85 - - [01/Dec/2010:06:26:19 +0000] "-" 408 - "-" 0 But with Apache 2.2, nothing is logged to the log file. I run the same test by using netcat to open the connection: $ nc IP_victim PORT_victim $ nc 10.42.37.3 80 I would like to have Apache 2.2 log the same 408 code to the log file, so that we would know of attempted DoS attack from the outside. Do I need any more configuration in Apache 2 to enable this? I have tried some different configurations such as LogLevel = Debug, Timeout 30, RequestReadTimeout header=10 body=30. Thanks.

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• Windows 7 gadgets changing place when I move from dual monitor to a single one

  - by tsahilevi

  Hi, I am using Windows 7 on my laptop. At the office, I have a dual monitor setup through my docking station while at home or during meetings I use my laptop with its single monitor. Whenever I move between these two setups, Windows 7 plays with the location of the gadgets I have and I need to rearrange them each time. Is there a way to tell it to store these settings and locations (both gadgets and icons) so that it will remember their placement on the dual monitor setup and it will remember a different placement for the single monitor setup?

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• Why use multiple partitions on a rhel server?

  - by Jakobud

  I'm about to reformat and reinstall CentOS onto an old server. The server runs on a modest 30 node small business network and has a variety of responsibilities including MySQL, a Samba share, DHCPd & SVN/Trac. The old sysadmin had this server setup with almost a dozen different partitions for various things. I'm trying to understand what the advantages of multiple partitions are as opposed to a just one filesystem at /. Speed? Flexibility? Security? It seems like if you misjudge the necessary size for any given partition and it ends up filling up too fast, it requires a sysadmin to go in and expand the partition, etc... Seems like it would be easier if everything was just one flat / filesystem. But I'm sure there are some advantages I'm not aware of. The server is currently running a handful of HDDs raided to ~2TB (raid 0).

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• Doubts about Cloud Infrastructure

  - by Pravin

  Maybe a little more of the same questions that others have asked but wanted to clarify my doubt, for some years run my hosting company (reseller of esds) and I've done well so far, but I am determined to bring quality and server technology to offer another level. So far I have understood that there is a difference between cloud and cluster servers because the cluster function as load balancers that distribute in different servers roles and use the servers less overloaded in the cloud is the union of multiple servers and then the same is vitualized unlike the cluster that is allowed to use the resources of the CPU and RAM servers in the virtualized environment. My approach is to use 3 dedicated servers to create a cloud server, My doubts: Does this type of cloud servers are only reserved for big companies? (Either because the union of the servers is done by hardware or software with high price) What characteristics should these servers meet? Possibly through software which should be used? Available? Thanks for your time, Cheers!

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• Enable/Disable a network adapter with a keyboard shortcut

  - by Carlos

  I started out trying to use a shortcut to display the Local Area Connection Status window on my desktop by creating a shortcut and assigning it Ctrl+, (comma). Windows didn't like that, so it added Alt, which ended up being Ctrl+Alt++,. Since I couldn't figure out a way to eliminate Alt as part of the shortcut keys, I am now trying a different strategy and it's not working. My latest attempt is to use AutoHotkey with the following command: ^,::Run, explorer ::{BA126ADB-2166-11D1-B1D0-00805FC1270E} Which is what the shortcut target number is, but it won't open the window.

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• Use Dynamic DNS to access Java servlet, still need port forward ?

  - by Frank

  If I use Dynamic DNS such as the free service at https://www.dyndns.com, do I still need to set up static IP and do port forward ? I have a DSL, most likely with dynamic IP address, and I run a Java servlet to get Paypal IPN messages on my notebook, in order for the messages to reach my notebook, I : [1] set up static IP and [2] did port forwarding. But I found each time the PC re-starts, it has a different external IP, so I was suggested to [3] get Dynamic DNS service like the free one mentioned above, but now I'm a bit confused, if I have step [3], do I still need to do [1] and [2], isn't step [3] supposed to do [1] and [2] for me ? But since I've already done [1],[2], now I wonder if they would cause trouble for step [3], do I need to undo them ? Or do I need all of them together ?

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• Remote desktop to particular server tries to send print job

  - by Jerry Dodge

  We have a domain network with about 30 computers and an active directory on Windows Server SBS 2003 32bit. Whenever I connect to this server from my Windows 7 Pro 32bit client, it automatically attempts to send some sort of print job. It fails to print however and the printer never seems to receive the job. I have been seeing this happen on every computer which connects to this particular server. It seems to send these print jobs repeatedly, and to different printers, if more than one are installed. As soon as I cancel one print job, it starts another, repeats a few times and finally stops. What could be going on here? PS - I originally thought this was related to MS OneNote but this turns out to happen on computers which do not have OneNote.

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• failover cluster file replication

  - by user156144

  I have a Windows 2008 R2 failover cluster server. I am going to move one of our window services onto this new server. The service writes some trace information to a log file on the local harddrive. This will become a problem when it is moved to cluster server when cluster A become unavailable and cluster B takes over and now there are 2 places where I need to look for log files. Is there a way to make sure regardless of which cluster is on, I get one complete log file? I have been researching this and there is something called DFS replication but i was wondering if there is something better that works with failover cluster... I prefer not having to update my code. I can specify it to write log files to a different location by changing app.config file but no code change...

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• How to prevent Outlook from receiving multiple copies of the same email

  - by martani_net

  This question might be asked already, but it's different from this one. My boss has Outlook 2003, when he synchronize his emails while connecting through the local server (using Exchange I guess) he gets his emails normally. Once he is outside (not connection to our LAN) he gets each email duplicated 3 or 4 times. Does anyone experienced this before? and how can we fix this? Please no links to FAQ pages. For info, we are using Kaspersky anti virus and Windows 2003 server, with windows XP clients. [Update] Actually we have a bunch of 5 or 6 email accounts on Outlook, and only one of them recieve duplicated copies of the same email, all the others are cool. Further more all these email are using the sae service, Gmail for example. [Update 2] I just found out that Outlook is configured to remove emails from the server already, also, some emails exceeds 5 copies! Thank you

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• IBM Tivoli Network Manager IP Edition - Job does not run

  - by Thorsten Niehues

  Since our network discovery takes too long I tried to split the biggest job into two parts. The two parts use the same Perl script but have a different scope. I copied a Job (Agent) doing the following: Copied the .agnt file Copied the associated perl script The problem is that one or the other job (changes randomly) does not run. The Disco Process will fail eventually. In the log of the job which does not run I see the following error message: Wed Jul 18 08:48:54 2012 Warning: Failed to send on transport layer found in file CRivObjSockClient.cc at line 1293 - Client My_MacTable_Cis is not connected to service Helper How do I fix this problem?

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• One server, Two APC UPS on redundant power supplies : How to trigger shutdown ?

  - by Falken

  I have a server racked and its redundant power supplies plugged in two APC Smart-UPS 3000 XLM. Each UPS is connected to two different mains power sources. Two instances of apcupsd are running, each one connected to its own UPS. They can both detect when an UPS is on Battery, and each UPS can then trigger a shutdown on the server. Question is : How NOT to shutdown if ONLY ONE UPS runs out of battery ? Note : Smart-UPS 3000 XLM has a "Power Sync" Function that is able to connect to its peer and detect its status. But when I pulled the plug out of one of them, the Shutdown order was sent anyway. I'm thinking about modifying the shutdown scripts to check with "apcaccess" if the other ups is down. Any experience on this would be appreciated !

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• DNA and Quantum computing

  - by Jacques

  I recently(A couple of weeks ago) read an article about the future of processing and how quantum-processors and DNA-processors(DNA-computing) are the future competitors of computing since both will completely outperform the computers of this era. In terms of processing speeds, what do we expect from these two different processing techniques ? Personally I believe that DNA-processing will be a major step towards AI. For labs and office work I think quantum-processing which will be more logical. I'm quite excited that i'm still so young - to see what the future of technology holds! Then again my parents will soon find out what the after-life holds... just as bloody exciting, if not more..

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• How to temporarily stop web pages intercepting a right-click?

  - by callum

  Some websites like Google Drive intercept right-clicks and provide their own context menu. This is usually what I want, but sometimes I still want to do a normal, native browser right-click. Is there any modifier key or something like that to make it so a right-click doesn't trigger a click event on the web page, so it can't show it's context menu? I want to do this per-click, not by changing a setting somewhere. If there are different techniques depending on browser/OS, please list them.

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• Wikipedia Images don't show up in browsers

  - by mantra

  It's a weird issue with wikipedia which had left me frustrated. When I go to wikipedia, with different browsers ( IE8, Chrome3, Opera10 ) no image in the site will show up. Even right-clicking the image to ( show, save, open in new tab/window ) will return nothing except when open in new tab/window I'll get a black horizontal line across the page. All my browsing across the web goes flawlessly, and every image in every site show up normally except in the wikipedia site. I have win7 ultimate with all updates.

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• Setting alias for DynDNS domain

  - by metalball

  Hey all, I've created DynDNS domain for testing my local sites, and i'm having trouble with pointing to root domain. From my registrar (GoDaddy) I've created a CNAME for www to point my example.dyndns.com so going to url www.example.com I'm reaching my site. But if I'm going to example.com I'm reaching to the IP of the A record. I can't set the IP for the A record to be my IP because I have dynamic IP, and it changes constatly, and I can't point the A record to domain, only IP. When trying to create CNAME record @ to point example.dyndns.com I'm getting error "A record of a different type exists for the hostname @, could not create CNAME" The only record using the '@' host are NS record, which I can't delete, and when tried to set another NS record with @ point to example.dyndns.com, I've lost connection to my site :) So what can I do to get example.com url reach my site? Thanx!

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• Advantages of multiple SQL Server files with a single RAID array

  - by Dr Giles M

  Originally posted on stack overflow, but re-worded. Imagine the scenario : For a database I have RAID arrays R: (MDF) T: (transaction log) and of course shared transparent usage of X: (tempDB). I've been reading around and get the impression that if you are using RAID then adding multiple SQL Server NDF files sitting on R: within a filegroup won't yeild any more improvements. Of course, adding another raid array S: and putting an NDF file on that would. However, being a reasonably savvy software person, it's not unthinkable to hypothesise that, even for smaller MDFs sitting on one RAID array that SQL Server will perform growth and locking operations (for writes) on the MDF, so adding NDFs to the filegroup even if they sat on R: would distribute the locking operations and growth operations allowing more throughput? Or does the time taken to reconstruct the data from distributed filegroups outweigh the benefits of reduced locking? I'm also aware that the behaviour and benefits may be different for tables/indeces/log. Is there a good site that distinguishes the benefits of multiple files when RAID is already in place?

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• Command line tool for listing ID3 tags under Linux

  - by petersohn

  I want to write a script that manipulates ID3 tags of mp3 files. I need a tool that reads the tags and outputs it in a format in a machine-readable format. For example, if I want it to output only the title, then it outputs the title, nothing else. I tried different tools like id3 or eyeD3, but they can only be used to write tags or to output them in a human-readable format. Of course I could just filter that output through sed, but it seems unnecessarily complicated to me.

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• How well will ntpd work when the latency is highly variable?

  - by JP Anderson

  I have an application where we are using some non-standard networking equipment (cannot be changed) that goes into a dormant state between traffic bursts. The network latency is very high for the first packet since it's essentially waking the system, waiting for it to reconnect, and then making the first round-trip. Subsequent messages (provided they are within the next minute or so) are much faster, but still highly-latent. A typical set of pings will look like 2500ms, 900ms, 880ms, 885ms, 900ms, 890ms, etc. Given that NTP uses several round trips before computing the offset, how well can I expect ntpd to work over this kind of link? Will the initially slow first round trip be ignored based on the much different (and faster) following messages to/from the ntp server? Thanks and Regards.

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• Installing raid controller forces reinstall of Windows Server 2008

  - by Tyler

  So, I've tried two different RAID controllers that have external SATA connections on my Server 2008 machine. I can install the hardware, boot into Windows, install the drivers and reboot again. No problems. However, as soon as I try to use eSATA-connected drives and reboot something happens to the Windows install and I can no longer boot into Windows. I tried repairing from the command line, and the end result is that repair console tells me I have 0 Windows installations (?). I end up having no choice but to reinstall Windows to get back on track. I must be doing something fundamentally wrong here, but I don't know what :(

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• Ubuntu server very slow out of the blue sky (Rails, passenger, nginx)

  - by snitko

  I run Ubuntu server 8.04 on Linode with multiple Rails apps under Passenger + nginx. Today I've noticed it takes quite a lot of time to load a page (5-10 secs). And it's not only websites, ssh seems to be affected too. Having no clue why this may be happening, I started to check different things. I checked how the log files are rotated, I checked if there's enough free disk space and memory. I also checked IO rate, here's the output: $ iostat avg-cpu: %user %nice %system %iowait %steal %idle 0.17 0.00 0.02 0.57 0.16 99.07 Device: tps Blk_read/s Blk_wrtn/s Blk_read Blk_wrtn xvda 2.25 39.50 16.08 147042 59856 xvdb 0.00 0.05 0.00 192 0 xvdc 2.20 25.93 24.93 96530 92808 xvdd 0.01 0.12 0.00 434 16 xvde 0.04 0.23 0.35 858 1304 xvdf 0.37 0.31 4.12 1162 15352 Rebooting didn't help either. Any ideas where should I be looking?

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• MSSQL instance shuts down

  - by citronas

  I'm currently developing a new ASP.net project hosted on a Windows Server 2008 RC2 with an MSSQL 2008 Express Database. I have three SQL instances (for different purposes) running which currently all contain a single database. For apprently no reason, these instances tend to shut down after some days, for no apparent reason. There might be low or none traffic to these instances, because there might be some days in a row, where I can't develop. It now occured several times, that one or two of these three instances just shut down, so that I can't access the database, without manually starting the instance. I can't seem to find a event log entry for the shutdown, which is most likely because I just enabled logging (why is the default setting off?) So the questions are: * Why does a SQL instance shut down? (Is there such thing as a "Shut down instance after 3 days of inactivity"? * How can I achieve that the instances are running 24/7?

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• Program to print gCal or iCal calendars in a monthly one calendar per column format

  - by David Smith

  I'm moving my family off of using the low tech "Boynton Mom's Family Calendar" to schedule things but I'd like to be able to create a monthly printout of the calendar in the same "Boynton" format (I'm sure it has an official name). The format is kind-of like a spreadsheet where each row of the calendar is a different day of the month and there is a separate column for each person in the family. I have all our calendars on Google but they are also accessible from iCal on the Mac. Is there a Mac program that can get the data from gCal or iCal print out the calendars in the Boynton format?

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• Using rsync when files on one end are all lowercase

  - by DormoTheNord

  I want to rsync a lot of files from a Windows box to a Linux server. The problem is, the files on Windows are all mixed case, and the files on the linux server need to be all lowercase. One solution is to have a script that rsyncs to a different directory on the server, copy the files into the main directory, and then convert them all to lowercase. I'd rather find a more elegant solution, though. I'd prefer a command line application, but I'd be willing to go with a GUI application if that's the best option.

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• Limit which processes a user can restart with supervisor?

  - by dvcolgan

  I have used supervisor to manage a Gunicorn process running a Django site, though this question could pertain to anything being managed by supervisor. Previously I was the only person managing and using our server, and supervisor just ran as root and I would use sudo to run supervisorctl restart myapp when needed. Now our server has to support multiple users working on different sites, and each project needs to be able to restart their own gunicorn processes without being able to restart other users' processes. I followed this blog post: http://drumcoder.co.uk/blog/2010/nov/24/running-supervisorctl-non-root/ and was able to allow non-root users to use supervisorctl, but now anyone can restart anyone else's processes. From the looks of it, supervisor doesn't have a way of doing per-user access control. Anyone have any ideas on how to allow users to restart only their own processes without root?

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• Confusion over terminology SSH, Shell, Terminal, Command Prompt and Telnet

  - by byronyasgur

  I don't usually use SSH if I can get away with it, but if I have to I do of course, and I've seemingly done this for years while still managing to remain slightly confused about these different terms ... from my basic research, this is my understanding, could someone verify/correct this? Telnet ... before SSH, not secure SSH ... ( secure shell ) the general name of the system/protocol Shell ... short name for SSH Command Line/Command Prompt ... the windows version Terminal ... the Unix version, also used by apple. Two further questions: What is the Linux version commonly called, is it just called SSH ? What is bash ?

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