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• Why does everybody have the same MAC address as me?

  - by iblue

  I just bought some consumer-grade McCheap PCI-E NICs (and this was a bad idea). They both have the same MAC address. When I google it, it seems like every card of that company has the same address: 00:50:43:00:45:3e. Shouldn't they be unique? According to lspci it's a Marvell Technology Group Ltd. 88E8053 PCI-E Gigabit Ethernet Controller (rev 20). Is there a way to permanently flash a new address?

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• Web Server Setup

  - by gustyaquino

  Hello, In my workplace, we want to implement your own web server for at leat 100 Apache/PHP/MySQL web pages. My boss is opposed to hiring skilled personnel, he think we can do ourselves. Currently, we are working with hostgator reseller account. I chose CentOS as the operating system, but I don't know the best hardware solution. HP, Dell ? What about the setup on these platforms? Thanks. PS: sorry for my bad english Edit: The purpose of this migration isn't related to performance issues. But independence.

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• Unable to mount cifs in redhat 6

  - by user3734522

  I am relatively new to Linux, and I am trying to mount a CIFS filesystem from an openfiler instance I have on my network in Red Hat. The openfiler instance is authenticating using AD. I am able to connect using samba: smbclient '\\10.25.214.26\cluster_storage.cluster.Cluster' -U [DOMAIN]+[USERNAME] Enter DOMAIN+USERNAME's password: Domain=[DOMAIN] OS=[Unix] Server=[Samba 3.5.6] smb: \> When I attempt to mount on boot via fstab, I am told that the line is bad during startup. mount -t cifs -o username=[DOMAIN]+[USERNAME], password=[my password], domain=[domain.edu] '\\10.25.214.26\cluster_storage.cluster.Cluster' /mnt/scratch Any help would be greatly appreciated.

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• Black screen with cursor after BIOS screen

  - by Radio

  Here is a weird one, Got computer with Windows XP. It's getting stuck on a black screen with cursor blinking. What did I do: - Boot from installation CD (recovery option - command line): chkdsk C: /R copy D:\i386\ntdetect.com c:\ copy D:\i386\ntldr c:\ fixmbr fixboot Chkdsk showed 0 bad sectors and no problems during scan. dir on C:\ shows all directories and files in place (Windows, Program Files, Documents and Settings). BIOS shows correct boot drive. Still does not boot. Not sure what to think of. Please help. UPDATE: Just performed these steps: Backed up current disk C: (without MBR) using True Image to external hard drive Ran Windows XP clean installation with deleting all partitions and creating new one. Hard drive booted fine into Windows GUI installation!!! Then: I interrupted installation. Booted from True Image recovery CD and restored archive of disk C to an new partition. Same issue with black screen.

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• Does connecting to the default host via public IP from within its subnet cause any issues?

  - by username

  I'm setting up a small office network with a single public IP (let's say it's 69.16.230.117). I've configured NAT on the router with incoming traffic forwarded to the server (say the server has a private IP of 192.168.0.2). Is it okay to configure the client machines on the same subnet to access the server via the router's public IP (69.16.230.117)? In practice it's never caused me problems, but I've heard, here and there, that it is a bad idea, and one should use the private IP (192.168.0.2). Does connecting to the default host via public IP from within its subnet cause any issues? Please refrain from writing "never! it breaks the intranet!" ;-)

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• What's the best way to be able to reimage windows computers?

  - by mos

  I've got a low-end machine for testing our software. It needs to be tested under various versions of Windows, so I was planning installing each one on its own partition. Then I realized that after testing our software, I'd want to roll back to the previous, clean state. I don't want to use any virtualization software because it tends to interfere with the workings of our app. That said, what's the best way to achieve my goal? Norton Ghost? Edit: I work for a pretty monstrously huge organization. Money is no object here (and sometimes, if the wrong people get wind of it, "open source" software is bad).

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• Windows 7 Built-In VPN - How to access network shares, printers, etc.?

  - by mbrion

  After I have successfully connected to a Windows 7 box via the built-in VPN: how do I access shares, shared printers, network appliances, etc.? So, call me bad at googling, but: I can find dozens of articles on "How to Set up a VPN Connection" and "How to connect to a VPN" for Windows 7... but I can't find a single article on how to access resources after connecting. I have a home VPN set up in Windows 7; I was able to connect to it from my friend's Windows 7 machine last night. I expected to be able to UNC into my shares; I also expected to be able to go to "Start Computer" and Click "Network" on the left side, and then see all of the devices on my home network (while the VPN was connected). Am I missing something obvious? How do I make this happen?

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• Windows 7 Built-In VPN - How to access network shares, printers, etc.?

  - by Mike Brion

  After I have successfully connected to a Windows 7 box via the built-in VPN: how do I access shares, shared printers, network appliances, etc.? So, call me bad at googling, but: I can find dozens of articles on "How to Set up a VPN Connection" and "How to connect to a VPN" for Windows 7... but I can't find a single article on how to access resources after connecting. I have a home VPN set up in Windows 7; I was able to connect to it from my friend's Windows 7 machine last night. I expected to be able to UNC into my shares; I also expected to be able to go to "Start Computer" and Click "Network" on the left side, and then see all of the devices on my home network (while the VPN was connected). Am I missing something obvious? How do I make this happen?

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• Which motherboard for Intel i7 and how to get RAID working?

  - by jasondavis

  I am wanting to build a new PC, I have a couple questions. 1) I am wanting to go with the Intel Core i7 920 Processor, can anyone reccomend a good reliable motherboard for this processor? Graphics card support does not matter (sli-crossfire). I would like to support a lot of ram, so the more ram slots the better. I have read so many bad reviews about certain boards not working good, I would love recommendation from experience. 2) I am wanting to run a couple SSD drives in RAID-0, I have never done this, will I need to purchase anything additional to the MB and CPU and drives to get raid working?

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• Fastest security check of file tree on NFS

  - by fungs

  I am currently experiencing very bad performance using the following on an NFS network folder: time find . | while read f; do test -L "$f" && f=$(readlink -m $f); grp="$(stat -c %G $f)"; perm="$(stat -c %A $f)"; done Question 1) Within the loop permissions are checked using the variables grp and perm. Is there a way to lower the amount of disc I/O for these kind of checks over the network (e.g. read all meta data at once using find)? Question 2) It seems like the NFS isn't tuned very well, the same operation on a similar network link via SSHFS take only one third of the time. All parameters are auto-negotiated. Any suggestions?

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• Why are the prices for broadband bandwidth at data centers much higher than consumer/small business offerings?

  - by odemarken

  The prices for broadband bandwidth at data centers are sometimes as much as 10x higher than for a typical small business/consumer connection, at least where I live. Now, I understand those are two differend kind of products, but what exactly are the differences? Is it mainly because the bandwidth you get at a data center is guaranteed (CIR), while a consumer offer lists maximal bandwidth (EIR/MIR)? Or are there other factors as well? (Note: my previous, much more specific question on the same general topic was closed as not constructive. I tried to extract the core issue and present it in a way that can be answered objectively. If you feel that this question is still bad and should be closed, please care to comment and explain why.)

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• Poor disk performance with high disk capacity usage

  - by GoldenNewby

  I've heard numerous times in the web hosting industry that using "too much" disk space on a drive is bad for performance. Is this just a myth? Can someone explain why this is an issue, even in a situation where the amount of IO done to the drive would be the same at 10% as it would be at 90%? I'm especially curious in the case of virtual servers. If I set up 10 Logical volumes as the virtual disks for some VMs, is it going to run better if I "waste" 20% of the disk space?

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• Issues With IIS Hosting Two Domains From Same Folder

  - by Bob Mc

  I have two different domain names that resolve to the same ASP.Net site. Both domains are hosted on the same server, which runs Windows Server 2003 and IIS6. The sites are differentiated in IIS Manager using host headers. However, both of the sites point to the same folder on the local drive for the site's page files. I am occasionally experiencing an ASP.Net error that says "The state information is invalid for this page and might be corrupted." I'm the site developer so I've addressed all the relevant code-related causes for this issue. However, I was wondering whether having two domains/sites sharing the same folder for an ASP.Net application might be causing this intermittent error. Also, is this generally a bad practice? Should I make separate, duplicate folders for each of the domains? Seems like that can become a maintenance headache.

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• Access Rails under /app/, not /app/public/

  - by blinry

  I'm trying to deploy Rails 2.1.2 with Apache 2.2.10 and FastCGI (yeah, bad, ancient, ugly, I know). My application can be accessed via example.com/app/public/, but I want to access it via example.com/app/. In my .htaccess-File (in the app/-directory!) I have: RewriteEngine On RewriteBase /app/ RewriteCond %{REQUEST_FILENAME} !-f RewriteRule ^(.*)$ public/dispatch.fcgi [QSA,L] How can I forward each request going to app/ to app/public/? Every time I try this (like, with RewriteRule ^.*$ public/$1 [QSA]) I get a routing error: No route matches "/app/" with {:method=>:get} Help?

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• Windows XP Map drive failed

  - by bajohns

  Greetings, I have a Windows Web Server 2008 VPS and two client machines. One is a Windows 7 box and the other XP. I configured one folder as a share on the 2008 box and attempted to mount it on each of the clients. The catch is it won't work with XP. Same username/password but I get Access granted on the Win 7 but for XP I get: Failure Reason: Unknown user name or bad password. Status: 0xc000006d Any ideas? If this duplicates any other question please refer me but I cannot seem to find the answer.

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• Different color prompts for different machines when using terminal/ssh?

  - by bcrawl

  Hi, I have 5 machines I constantly ssh into to do work. Its getting increasingly frustrating when I am issuing wrong commands on wrong boxes. Luckily I havent done anything bad yet. I wanted to know if there is any hack which I can hardcode which will display my prompt in different colors based on the machine I am ssh into? Such as blue for desktop1, purple for laptop, red for server etc? Is this possible? Currently I am using this command export PS1="\e[0;31m[\u@\h \W]\$ \e[m " taken from here http://www.cyberciti.biz/faq/bash-shell-change-the-color-of-my-shell-prompt-under-linux-or-unix/ but it obviously doesnt work across ssh. Also, if you have any other cool bash tips for helping me ease my sight will be wonderful. I got this tip which colors the man pages. http://linuxtidbits.wordpress.com/2009/03/23/less-colors-for-man-pages/

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• Windows Recovery partition unusable after Ubuntu 12.04 install on Eee PC 1005P

  - by Crivat Camilar

  Installed Ubuntu 12.04 over the secondary (D:) partition with Grub2 handling multi-boot. Never accessed the 'Recovery' option in the boot menu until Windows7 Starter became unusable due to HDD failure (bad sectors on C:). Tried creating an USB recovery stick using the OEM's recovery application (F9) on hidden partition: all I got was a clean C:\ and an error telling me the recovery images cannot be found [R:\recovery\windowsre\ - or something very much like that] although everything is there (changed 'hidden' flag to check and copy contents). Nothing happens upon pressing F9, then Grub takes over giving the recovery option. The application starts but halts about 30s after initializing, very briefly displaying the error message above. I guess every time it goes through this it actually wipes C:\ but crashes immediately afterwards not being able to find what-ever .wim image files it needs. How to make it work?

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• Is there a way to use something like RewriteRule ... [PT] for an external URL?

  - by nbolton

  I have a non-apache web server running on port 8000, but this cannot be accessed from behind corporate firewalls. So, I would like to use my apache 2 server as a proxy to this other web server. I've tried using: RewriteEngine On RewriteRule /.* http://buildbot.synergy-foss.org:8000/builders/ [PT] ... but this does not work; I get: Bad Request Your browser sent a request that this server could not understand. However, it worked fine with [R]. Update: Also, when using ProxyPass, I get this error: Forbidden You don't have permission to access / on this server.

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• safe to setup NAS in virtual image with web server?

  - by Erik

  My current setup is Ubuntu Desktop, running Apache + MySQL + PHP stack. I use this image to host my small website to the outside world. I want to now run a virtual machine on the box, that will act as the FreeNAS box for my internal network. This sounds like a bad idea if the website gets hacked/attacked. Should I just give up and grab a dedicated machine instead? Can I instead virtualize the web server and NAS side by side on this machine?

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• How do I make stunnel verify a clients certificate?

  - by unixman83

  NOTE: The title is misleading. Please correct it if you know a better title. What I want to know is how do I create the SSL keys / certificates needed for this. Hi. I am using stunnel to authenticate RDP (Remote Desktop) and I need to verify that a client possesses the proper credentials. So people cannot brute force into the machine. I am also using a bad (outdated) version of RDP that has security vulnerabilities, so stunnel is a must. I will preshare the necessary .pem's between machines. What are the openssl commands I need to create the right .pem files on both the client and on the server? What files need to be shared?

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• How to inspect/modify Windows Firewall rules while the Windows Firewall/ICS service is stopped and disabled?

  - by Kal

  I'm trying to fix up my friend's remote Windows Server 2003 R2 machine. I have Remote Desktop access at the moment. However, I notice that Windows Firewall/Internet Connection Sharing service of the remote machine is disabled, which seems to be a bad idea. If I enable and start the service now, I may lose my Remote Desktop access in case the exception rule for Remode Desktop has not been defined in Windows Firewall. So I need a way to inspect and modify exception rules even as the Windows Firewall/ICS service is stopped and disabled. Does anybody know how?

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• running commands as other users - best method

  - by linuxrawkstar

  When running commands as other users from the command line, what is recommended best practice? In the past I've used sudo like so: sudo -u username command [args] I've been told (with no specific reasons why) that using sudo for this purpose is wrong. I'd like to know why. Is there some "best way" to accomplish this? For example, I've also used the su command like so: su username - -c "command [args]" I can't imagine why either of these methods would be "bad". Your thoughts?

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• Deny IIS6 web request based on URL parameters?

  - by user21146

  I've got a legacy app running a third-party ecommerce system under IIS6. Some spammers recently discovered a bad security vulnerability in one of the store's forms, which are allowing them to send arbitrary emails from our system. Unfortunately, this store "feature" is built into the default.aspx page's code-behind and I have no way to disable it without shutting down the store. How can I filter out URL request with a given querystring parameter? ie, I want to filter out requests to: http://www.mysite.com/store/?id=SendSpam based on the "SendSpam" string.

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• Move email off Small Business Server to Google Apps, retain other SBS functions?

  - by Paul S.

  Recently, an in-house Microsoft Small Business Server 2011 was installed where I work. Unfortunately, our buildings have a bad electrical power supply and we suffer frequent outages. We have a large percentage of staff working off-site. Now when the power goes off here, everyone everywhere loses email functionality. I have been assigned to research the possibility of routing our email to Google Apps while maintaining LAN functions on the SBS. I haven't worked with Microsoft products for several years now, so do not know how SBS is structured. Can anyone here tell me if this is possible, or point me to good resources that explain our options?

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• Blank screen on laptop after replacement

  - by Mark

  I have an Acer Aspire 5332 laptop, running Windows 7 home premium 32bit. My screen broke, but the particular screen (LED) are no longer made so I bought a CCFL one with a new converter which has proven to be compatible according to the supplier. When I first booted the screen went blank just after the Windows logo was displayed. I suspected a driver issue, so booted in safe mode without any problems, disabled the display adapter (Intel 4 series express family) and it booted up fine. So I guess the screen is not compatible with the display adapter. The driver version is 8.15.10.1892. I tried updating from the Intel site, but it saying it cannot (something to do with manufacturer specific). The supplier is not willing to take it back, so I'm down £60 (UK). I can use it with the adapter disabled, but the quality is bad and I cannnot play video, etc. Any help appreciated.

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