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• Network flooded with seemingly empty packets

  - by Adam Particka

  Let me preface this with the fact that I'm just a web developer at my company with little networking knowledge. Earlier today there was a department that lost all of their network connections so I popped open Wireshark and observed the influx of packets to my machine. There was normal traffic (ARP requests, etc.) coming in at ~50 packets every second. Then all of a sudden the log was flooded with packets arriving ~5000 a second. It looks as though they all contain the same data, just a looped sequence. We have someone here looking at it but I thought I would ask if anyone had seen anything like this before. Here's a selection from one of the captures in Wireshark. http://www.cloudshark.org/captures/06f950725c74

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• Updating a modified Prestashop

  - by Emphram Stavanger

  I don't know if this is the proper forum for this; didn't really seem like a Stack Overflow question, so if I'm in the wrong here, do point me to the correct SE site. Anyway, I have a Prestashop 1.4.7.3 installed on a CentOS 5 machine. Recently, they released the 1.5.0 version, which I'd like to upgrade to. However, during developing a rather customized theme for it, I had to modify the core files (and yes I know how stupid this was, and probably even more stupid that I didn't keep a list of modified files). What's done is done though. So now I'm faced with a problem; I need to update, but I don't want it to overwrite my modifications. Is there a way (preferably in the console) to do a diff between my current installation and 1.4.7.3 vanilla, to get a list of files that are modified (sans the themes folder, perhaps)?

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• How to prevent computer from automatically sleeping and/or hibernating?

  - by mehaase

  I'm running Ubuntu 12.04, and my laptop* won't wake from sleep/suspend/hibernate. (Is sleep the same thing as suspend?) I'm not even sure which of these things it's doing. When I am done working for the day, I lock my screen (Control-Alt-L). When I come back the next day, the screen is in power saving mode, and no amount of typing or clicking (on the usb keyboard/mouse or the builtin keyboard/trackpad) nor tapping the power button will bring it back to life. The only way I can get my machine to work is to hold down the power button until it shuts off, then press the power button again to turn it back on. Obviously, anything I had open from the previous day is pretty much gone -- in particular, my VMs all get rudely shut down without any warning. This is driving me INSANE. I spend the first hour of every work day trying to figure out how to get my computer to stop locking up over night. What I've tried: Editing the org.freedesktop.upower.policy to disable suspend and hibernate. Setting power management options in "Power" section of "System Settings". Looking at all power management options in the BIOS (none appear to be relevant to sleep/suspend/hibernate). Reading every forum post/askubuntu post that I can find that's even tangentially related to the subject. My question: how to disable the automatic sleep and/or hibernate (and/or anything similar) in Ubuntu 12.04. I don't care if it's still possible to sleep/suspend/hibernate/whatever by pushing buttons or running some command or reciting led zeppelin lyrics backwards. I just want my laptop to be ready for work in the morning. *The laptop is a Dell Latitude something or other. I don't want to get too specific because I've seen a lot of similar questions get closed for being too specific. I think my question is generic enough to stand -- it's a question about the latest, stable version of Ubuntu.

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• Hosting and scaling a Facebook application in the cloud? [closed]

  - by DhruvPathak

  Possible Duplicate: How to find web hosting that meets my requirements? We would be building a Facebook application in Django (Python), but still not sure of where to host it economically, and with a good provision to scale in case the app gets viral. Some details about the app: Would be HTML based like a website,using django as a framework. 100K is the number of expected pageviews in a day, if the app is viral. The users will not generate any media content, only some database data will be generated by them. It would be great if someone with more experience can guide on following points: A) Hosting on Google app engine or Amazon EC2 or some other cloud like RackSpace : Preferable points found in AppEngine were ease of deployment, cost effectiveness and easy scaling. For EC2: Full hold of the virtual machine,Amazon NoSQL and RDMBS database services in case we decide to use them. B) Does backend technology affect monthly cost? eg. would CPU and memory usage difference of Django over , for example , PHP framework like CodeIgnitor really make remarkable difference in running costs. (Here is the article that triggered this thought process : http://journal.dedasys.com/2010/01/12/rough-estimates-of-the-dollar-cost-of-scaling-web-platforms-part-i#comments) C) Does something like Heroku , which provides additional services over Amazon EC2, prove to be better than raw cloud management? It is not that we are trying for premature scaling, we just want to have a good start so that we are ready to handle unpredicted growth and scale.

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• Vmware Workstation 10 connect remote server (Debian, Guest-Windows XP) Does not allow raw disk access nor shared folders

  - by Alex

  The setup: Ubuntu with local Vmware Workstation 10 (everything works locally) Connects(File- Connect to Server) Debian server with the same Vmware Workstation 10 (Windows XP Guest) Debian setup does not allow raw disk access nor shared folders (most options does not exist) No shared folder No physical disk option I use root user for this machine. Default install. I've tried to add shared folder from command line - it does not work. How to enable shared folders or raw disk access? I have created new Windows 8 64 bit template from scratch - I cannot use physical HDD either, and no SharedFolder option. I think this is something about security policy of remote server.

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• can't delete files on Windows 7 (permission)

  - by lajos

  I updated my laptop from XP to Windows 7. There are some leftover files from XP on the computer now, when I try deleting them I get an error: You need permission to perform this action. You require permission from S-1-.... to make changes to this folder. What's weird is that I am logged in with the only user account on this machine and I have administrator privileges. I tried turning UAC off, but still can't delete the files. How can I force removal of these files?

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• Running VMWare EXS(i) on Apple Xserve

  - by xzyfer

  So we're running VMWare Esx(i) (I'm not completely sure which as I'm out of the office) running on Windows Server 2008. However it turns out the machine we're running it on has serious hardware limitations, most importantly it's restricted to 4gb of ram. We've since inherited a much more powerful server. The problem being the new server is an Apple Xserver running, I believe, Snow Leopard Server. My question is, can I run VMWare Exs(i) on Xserver, or an equivalent? I'm done some hardcore Googling and the best that I can find is that it's not supported, but it might work, but there are no guarantees (this has been stated many times on the VMWare forums by the VMWare support staff). But all these search results are years old, so I can't find any recent answers regarding this. Has anyone accomplished this?

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• Request to server x Reply from server y

  - by klaasio

  I need some advice from you guys: I'm dealing with a custom loadbalancer/software for which we will use 2 main servers and about 8 slave servers. In short: User sends request to main server, main server will receive and handle the requests, sends a request to a slave server and slave server should send data DIRECTLY to the "user". User - Main server Main server - Slave server Slave server - User The reason for which data should be send directly to the user and not through the main server is because of bandwidth and low budget. Now I have the following idea's: -IPinIP, but that is not possible in Layer7 (so far i know there some expensive routers for that) -IP Spoof, using C/C++ we will make it look like the reply came from main server. But I was thinking, perhaps the reply "slave server - User" could just come from a different IP without causing issues in the firewall from the user or his anti-virus. I don't know so well about "home" firewalls/routers and/or anti-virus software. I guess the user machine wouldn't handle it well?

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• BIND: How do I allow DNS query from specific external host?

  - by krbvroc1

  I'm running Centos 5.8 (bind 9.3.6). Here is my issue... I run my own DNS server to serve the local machine. I would like to use my DNS server from home. Since my home is a dynamic IP address, I am not sure how this would be accomplished. In my named.conf, there is an allow-query{} and allow-recursion{}. It seems both of those take an IP address, but i need to specify a hostname (at least a cname). This is not a public DNS server (so any is not an option). My hostname/cname is already updated automatically using nsupdate. The only solution I can think of, which I do not like, is to change my nsupdate script to somehow modify the named.conf to search/replace the allow-query/recursion IP address. That would require restarting named whenever the hostname changes as well as Is there some other way to handle this?

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• Reducing the size of the EDB file.

  - by Toby

  I have hit an issue on a MS SBS machine where every morning the datastore for the exchange mailboxes dismounts itself. We believe the issue is that it has grown too large over time and needs cut down a bit. As part of this we have removed (purged) some mail files that were no longer needed, which should have given us a saving of roughly 3GB (more than enough saving for what we need). So I deleted the mailboxes, then purged them and noticed that the .edb file was still reporting the same size, I dismounted and remounted it to see if that would have any effect but it did not. Am I missing a step? I have read online that you can run offline defrag on the file but that seems to only save you a small amount of whitespace. Any help would be greatly appreciated.

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• PCI IDE Controller

  - by mercutio

  I have a suspicion that the onboard IDE controllers may not be working. Every disk I use to setup this machine reports as damaged (using a win xp installation to test, since it gets to partition setup fastest) So, I popped an IDE PCI Controller card in, to test with, but no drives are showing up in the bios now. I went into setup and changed the BIOS settings to disable onboard IDE1 and 2 to test, but still didn't detect the drives. How do I get that working? It's a standard PC with a 160GB disk and DVD Drive on master and slave channels on a single cable, if that helps. Let me know what else I need to state.

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• Grub2 menu after vmware gust customization

  - by poopa

  Hi, I have ubuntu 9.10 desktop VMware VM with the default grub2 installed. There is some weird problem with this VM. When you clone this vm and have a customization script run, the cloned machine crashes at first boot (VMware does not officially suport customizaing Ubuntu newer than 8.04). After the creash the Grub boot menu is displayed but there is not time out. I checked /boot/grub/grub.cfg and it does indeed show a timeout of 10 seconds. Nothing happens till I select an option with the keyboard. The second time the Ubuntu loads, it does not crash. My question is, how do I make the grub menu timeout in that case? Thanks.

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• Which browser is the most secure? (research and practically based)

  - by wag2639

  I was wondering which browser is the most secure today, Firefox, Internet Explorer, Chrome, or Safari on a Windows machine with the user running as a Power User/Administrator account. This is not a question about which browser is the best because its the most usable, but more of a question if asked for security, which browser is the most secure given an everyday user's experience (JavaScript, Flash, Ads, etc). Also, would the choice for most secure change if the user was running as a restricted user? To clarify, I'm looking for an answer that's based in research on potential and common exploits and how long it takes for critical problems to be patched.

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• Why can't I use %USERPROFILE% in %PATH%?

  - by Zano

  On my Windows 7 machine, using the System Properties Environment Variables tool, I try to add %USERPROFILE%\Bin to the system variable PATH. For some reason, that doesn't work, even though %SystemRoot%\system32 works fine. When I try to run commands from the console, files in my Bin folder are not found, even though files in the System32 folder are found. The only difference between UserProfile and SystemRoot that I can see is that the former is a user variable while the latter is a system variable. I i write echo %USERPROFILE%\Bin it yields c:\Users\zano, and if I add c:\Users\zano\Bin explicitly, everything work fine. What's the problem here?

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• a safer no password sudo?

  - by Stacia

  Ok, here's my problem - Please don't yell at me for being insecure! :) This is on my host machine. I'm the only one using it so it's fairly safe, but I have a very complex password that is hard to type over and over. I use the console for moving files around and executing arbitrary commands a LOT, and I switch terminals, so sudo remembering for the console isn't enough (AND I still have to type in my terrible password at least once!) In the past I have used the NOPASSWD trick in sudoers but I've decided to be more secure. Is there any sort of compromise besides allowing no password access to certain apps? (which can still be insecure) Something that will stop malware and remote logins from sudo rm -rf /-ing me, but in my terminals I can type happily away? Can I have this per terminal, perhaps, so just random commands won't make it through? I've tried running the terminal emulations as sudo, but that puts me as root.

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• Windows 8 Update on Bootcamp

  - by RazorSharp

  I currently have Windows 8 Consumer Preview installed on a Mac Bootcamp Partition. Microsoft recently released the Windows 8 Release Preview, and I'd like to upgrade, but I'm worried that upgrading to the Release Preview (while in the Windows 8 partition) will erase my other partitions (ex. the Mac OS X partition). By upgrading from Consumer to Release (using the installer on Microsoft's website) while IN the Windows 8 partition, will it end up re-formating the whole hard drive / erasing partitions / removing Mac OS X? Are there any 100% positive answers out there? Will this work, and if not then how would you suggest updating? Note: I have a Time Machine backup of my Mac, but it isn't the WHOLE Mac.

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• Two SSL certificates required for two Apache servers using mod_proxy to serve HTTPS?

  - by Nick

  Our application originally used a single Apache server with mod_perl installed to serve up all HTTPS requests. Due to memory issues I've added a lighter Apache installation and used ProxyPass to hand off the Perl requests to the mod_perl enabled server. We currently have an SSL certificate installed on the mod_perl server but I'm struggling to understand whether we need a certificate for both servers or only the lightweight server which is receiving the original requests. Or can a certificate be used for more than one server on a single machine? Thanks in advance for any help/pointers.

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• PHP hosting some info required [closed]

  - by mtk

  I have recently given a control of newly bought hosting space and the domain account. There is a technical team from the hosting site to help out with problems, but that is a long process, i.e. log a ticket, wait for a long time, and I don't get the correct answer in the first shot. I was wondering, if anyone has any helpful guide and how one must go with hosting a site. Any info that must be know w.r.t to cpanel? Any other useful stuff if any one has, or could point me to ? Just to give a few difficulties: The same php code working well on local machine, giving error on remote as "File not found". The file is present indeed as I have ftp'ed all the files correctly. session_start error are outputted to html page with warning "Header already sent". and many more technical things, that work well on local but not on actual hosting server. So, if anyone has any helpful stuff in this reference, as to what all changes are required or what a programmer must be aware from a hosting perspective, please let me know. Note I am hosting a PHP site with mysql db, on a shared environment.

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• How to allow all traffic from 1 IP address Windows Firewall

  - by Foo_Chow

  I am trying to give another PC completely unrestricted access to my machine. They are both on the same subnet. What I am looking for is effectively disabling the firewall entirely for one IP address. Example Host: 192.168.1.2 Client: 192.168.1.3 Firewall "off" World: xxx.xxx.xxx.xxx Firewall "on" To be specific I am running "Easy"PHP as a testing server for websites and want to access them from other machines on my network. After tinkering I figure the method suggested in my question would be best to make things actually easy. PS. I have already tried opening all ports both inbound and outbound to that IP with no results. My only current success has been actually turning the whole firewall off.

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• Running a service as root

  - by kovica

  I have a java program that I use to automate the process of creating VPN settings for clients. The program calls couple of bash scripts, create and copies files around. I have to run it under root user because the whole VPN config is under /etc/openvpn. For this directory I need root privileges. On the same machine I have Glassfish application server and it will call the mentioned Java program. Glassfish is run under non-root user. What is the best, most secure way of running a program as a root user of course without entering a password if I run it via sudo?

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• Auto-response on a mail non universal group

  - by russ

  Four domain users are part of global security group [email protected] running on Windows Server 2008 Standard and Exchange 2007 as a mail non universal group. Our goal is to create an auto-responder rule, or template that fires at sender. I have created a mail-enabled public folder, with owner permissions for each group member. I have also set up a rule template (response) and I am a little unclear as to the send as permission set, or where to set that up. Can someone please tell me if I am on the right track? Will I have to do each Outlook client machine (whole group!) the same?

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• (Windows 7) Dial Up Connection Locks up the Networking Service

  - by Nick

  I connect to the internet by using my cell phone as a dial up modem. (shh, don't tell my service provider) The connection is usually seamless and the speed is good (150kbps) but occasionally, the connection will get terminated by either the phone or the network, I'm not sure which and then Windows7 stubbornly doesn't acknowledge that the connection is dead so I can re-dial. I have tried to manually kill the connection, but then anything related to the network service refuses to open and the connection is still there. No "Network and Sharing Center", "Network Devices" and often the tray menu will refuse to pop open. The only way I have found to clear the problem is a full restart which. Logging off doesn't work and I haven't been able to find the service that is frozen. If anyone knows how to fix this or prevent this from happening or even how to go about troubleshooting I would be very grateful. ps. This problem is non-existant when tethering in linux on the same machine. (Ubunutu 9 and JoliOS)

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• Wired and Wireless Network Duplication

  - by Dave

  Howdy! Running into an issue when some of our client's have their laptop's connected via the wired ethernet network aswell as on the WLAN of the same network. There is know issues caused to the end clients.. BUT! Being a Managed Services Engineer i get pretty over the alerts that come through on our reports for machine's with the same hostname on the same network! We are not going to remove this monitoring because it does help a lot with detecting and stopping inferior users and things like that. So basically.. Question is, is there a way in Windows (third party programs welcome) to disable the wireless network when a wired network is connected and operational.. I know that Windows automticaly 'prefers' the wired network, however they are still both connected and therfore there is duplicate hostnames on the same network. Could also have stupid issues with DNS and things like that! Thanks!

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• Can I install linux has the host in a dell poweredge server (r710)?

  - by bksunday

  I might have a deal on dual six core poweredge server and I'm about to go test its performance but I'm wondering few things which I can't find answers for, and I can't test them before buying the machine. I don't want vmware at all so can I just wipe it and install linux instead, or is it embedded in some parts I have no access to. Will I still be able to update different firmwares (perc controllers, motherboard, etc) on this dell poweredge or does it require to have the vmware esxi installed as the host os. And optionally.. is there any foreseeable problems in doing so?

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• Password not accepted when resuming from sleep

  - by Comrade

  My HP Pavilion dv-series notebook will not accept the user account password for the logged in user when resuming from sleep - message returned is Incorrect Password. Simply selecting the Switch User option reloads the login screen and allows me to log in as the same user with the same password that was originally rejected. And, yes I've tried it more than one (hundred) times in case you were thinking it's just a case of slippery fingers. Another interesting point is that it appears to be independent of the software running on the machine. Since the issue first appeared, I have done two clean installs where all HD partitions were wiped and new ones created during fresh installation of the OS. The first such clean install was of Ubuntu (Lucid) 10.04 amd-64, the second of Win 7 Pro 64 (from boxed disc and activated post install). Exactly the same symptoms, described above, are exhibited on both platforms. Have engaged in significant amount of Googling an come up empty so any ideas are welcome.

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