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• Are email addresses mandatory for Windows 8 login names?

  - by Cedric Martin

  I've got a computer running Windows 8 and in the user accounts I can see four accounts (they're in french, here's a rough translation): [email protected] / administrator Veronique YYY / [email protected] ASP.NET Machine Account / local account guest account / the guest account is desactivated I've got several questions but they're all related to email addresses and login names / accounts. Are email addresses mandatory for Windows 8 login names? Can you mix live and non-live user accounts on a Windows 8 system? Is it possible to have a live Windows 8 user account which is not using a @live.xx email address? Is it possible to have a non-live Windows 8 user account which is using a @live.xx email address? If the gmail.com email address of the admin is not a live Windows 8 account, does this mean I can create a "fake" email and use that as the email of a new Windows 8 account? Basically I don't understand very well why there are email addresses displayed on the login screen and why there are both @live.xx and @gmail.com email addresses on the same system and answer to the questions I asked above may help me understand a bit better what is going on (I'm coming from a Linux / OS X background. I literally haven't used Windows in more than a decade).

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• Dual boot Windows 8 and Ubuntu 12.10 across a reboot

  - by AK4749

  My Setup: I have two separate SSDs, and each contains an independently bootable OS - W8 and U12.10. From my extremely limited knowledge, this means each has a functioning EFI partition(?). My default boot order (GA-Z68XP-UD3P mobo with UEFI firmware update) boots the UEFI partition containing windows first, but if I enter the BIOS I can select the "ubuntu" entry to successfully boot ubuntu. Both drives are GPT, and are EFI boots. What I want to do: Reboot Windows 8, re-enter W8 (this is happening now due to the default boot order). What I want to change, however, is to boot into Ubuntu if i reboot from ubuntu. Essentially, I would like to work within one OS unless I consciously choose otherwise. Normally, I would not even ask to something I thought was impossible, but... Why I think this is possible: When trying EasyBCD to add ubuntu to the W8 UEFI bootloader, I noticed an "iReboot" addon or something that allows you to select which OS to boot into from within the OS. Note that I ended up not using the NeoGrub entry to chain Ubuntu off the W8 bootloader because I couldn't get much help with it. Is this possible? Have I had too much coffee and gone insane? Thank you all for your time, AK

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• Remote Desktop Services Licensing - Does server have to have a RDS role?

  - by transistor1

  I recently set up a "micro" size Windows 2008 Datacenter server on Amazon AWS. My small group needs several concurrent RDS users to be able to access the machine. Without installing the "Remote Desktop Server" role, it allows 2 concurrent connections. I read on MS' website that in order to set up multiple users, we needed to install the RDS role. I did so, but now the application we are trying to share is running much slower than it was before. Prior to the role installation, it was taking about 5 seconds to open; now it is taking a few minutes to open -- without any other users logged on except me. My assumption is that the RDS role may be too much for this micro instance to handle, and currently, changing to another size instance is not an option (it may be possible later if we were to receive enough funding). This leads me to the following questions: 1) Is it a sensible assessment to assume that it is the RDS role is slowing things down, or are there other things that I could look at to speed it up? We are talking about a machine with ~600MB of memory. 2) If I revert back to the pre-RDS role, is there any legitimate way (in terms of purchasing RDS licenses) to get more than 2 concurrent desktops? I did read this, and am not questioning that the answerer is knowlegeable; but someone else may have some other experience. I am also making it clear that we want to do this in a legitimate way. Thanks in advance for any assistance that can be provided! EDIT: if it is helpful in answering the question, the application in question is a Lotus Approach database. Also, I am asking this from a technical perspective: not a legal one. I want to know if it is possible to install valid licenses without the RDS role.

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• How to distribute multiple executions of an app across many machines

  - by Salec

  I've got a simulation app (64-bit windows) that runs without any user interaction. This app gathers information and pushes it to a remote MS SQL Server. What I'd like to do is execute this simulation as many times as I can on multiple machines after our nightly build has finished and it has passed the test suite. If possible I'd love to have the ability to configure it to stop after x total runs or if the entire batch has taken over y hours. I've tried using Visual Studio's built in test framework since we already have a test lab set up with multiple agents. I created a single unit test that simply runs the simulation then I created an ordered test and added that single test multiple times (from what I gather, this is the only way to execute the same unit test more than once). I found that ordered tests are only run on a single agent and not distributed which is very limiting. We use TeamCity to perform our nightly builds and I suspect it's possible to implement this on top of that, but I'm fairly new to TeamCity. We also have Jenkins and Bamboo available and I'm open to any other software that would get the job done presuming it runs on a 64-bit Windows OS. Any suggestions?

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• Svchost.exe connecting to different IPs with remote port 445

  - by Coll911

  Im using Windows XP Professional SP2. Whenever I start my Windows, svchost.exe starts connecting to all the possible IPs on LAN like from 192.168.1.2 to 192.168.1.200. The local port ranges from 1000-1099 and the remote port being 445. After it's done with the local IPs, it starts connecting to other random IPs. I tried blocking connections to the port 445 using the local security polices but it didn't work. Is there any possible way I could prevent svchost from connecting to these IPs without involving any firewall installed? My PC slows down due to the load. I scanned my PC with MalwareBytes and found out it was infected with a worm, it's deleted now but still svchost is connecting to the IPs. I also found out that in my Windows Firewall settings, under Internet Control Message Protocol (ICMP), there's a tick on "allow incoming echo request" (usually disabled) which is locked and I can't disable it. Its description is as follows Messages sent to this computer will be repeated back to the sender. This is used for trouble shooting for e.g to ping a machine. Requests of this type are automatically allowed if TCP port 445 is enabled. Any solutions? I can't bear going with the reinstalling Windows phase again.

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• Can't access YouTube

  - by Agentleader1

  I can not seem to connect to YouTube at all. If I connect directly to YouTube (youtube.com) I get this: And if I try to connect via video directly (youtube.com/watch?v=), I get this: Here's how this isn't a web issue: I have malware on my computer I believe. And the question here is, how do I get rid of it, or what possible issue could this be? I can verify this is not a website issue or wifi issue, I've tried to connect on another computer in my wifi, and it worked. It is the local machine issue. I've tried to get rid of malware at my best and also have tried to disable possible virus extensions. All can out as the same result: no help. Also, I am unable to find these hiding viruses. I used malware-bytes and Microsoft Security Essentials. Edit: This is OBVIOUSLY Windows. I am currently running on a laptop Windows 7 Home Premium 4gb ram 64-bit os Lifebook series manufactured by Fujitsu America, Inc. Intel(R) Core(TM) i3-3110M CPU @ 2.40GHz nslookup youtube.com:

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• How to modify a message, so it will be for 100% recognizable as spam by Exchange junk e-mail filter

  - by user71061

  Hi! I have an sendmail server, sitting in front of my Exchange server. This server filter spam with SpamAssassin (and do it incredibly well!), but it merely tag spam messages with appropriate header flags and by modifying message subject. When such a message arrives to user mailbox on Exchange server, where it is examined by Echange/Outlook junk e-mail filter, which put most of spam in junk message folder. And that is my problem: most, but not all! To put all spam in junk e-mail message folder, user has to define an rule, saying f.e: "If header contains text 'X-Spam-Flag: YES' then move it to 'Junk e-mail messages' folder". Fine, but it has to be done on every user (for some users, this task is too "complicated" to made it themselves :-) . So I want to know, how could I modify message header in such a way, that Exchange junk e-mail filter will for 100% recognize this message as a spam, freeing user from task of defining his own rule. Some solution could be defining such a rule by using AD and group policy, but I wan't to avoid this due to many possible caveats: there are so many combination of different operating system and different Outlook versions, and to be honest, I doubt if it is even possible.

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• Updating files with a Perforce trigger before submit [migrated]

  - by phantom-99w

  I understand that this question has, in essence, already been asked, but that question did not have an unequivocal answer, so please bear with me. Background: In my company, we use Perforce submission numbers as part of our versioning. Regardless of whether this is a correct method or not, that is how things are. Currently, many developers do separate submissions for code and documentation: first the code and then the documentation to update the client-facing docs with what the new version numbers should be. I would like to streamline this process. My thoughts are as follows: create a Perforce trigger (which runs on the server side) which scans the submitted documentation files (such as .txt) for a unique term (such as #####PERFORCE##CHANGELIST##NUMBER###ROFL###LOL###WHATEVER#####) and then replaces it with the value of what the change list would be when submitted. I already know how to determine this value. What I cannot figure out, is how or where to update the files. I have already determined that using the change-content trigger (whether possible or not), which "fire[s] after changelist creation and file transfer, but prior to committing the submit to the database", is the way to go. At this point the files need to exist somewhere on the server. How do I determine the (temporary?) location of these files from within, say, a Python script so that I can update or sed to replace the placeholder value with the intended value? The online documentation for Perforce which I have found so far have not been very explicit on whether this is possible or how the mechanics of a submission at this stage would work.

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• Installing Windows 8 to another computer with an OEM product Key

  - by user180671

  Questions come up after reading the article about the new method Microsoft uses to License windows 8 computers. Let say I bought a Brand new laptop with windows 8 preloaded. Not like the old way, there is no OEM sticker in the back of the computer which can be used for reloading system.(new product key is stored in BIOS as mentioned in the article, the key can be pulled out by using a software anyway). Is it possible to install windows 8 on another computer with that particular key in case the computer is totally damaged? Here is what i tried: First, I extracted the key with a software name "windows 8 key viewer". using the windows 8 upgrade tool to determine what copy of windows 8 I should download for the installation. The tool did correctly recognized the key as a legitimate one. but it claims that key can not be installed with a retail media (Since it is an oem key). Does this mean the only way to do it is to use an OEM CD from the manufacturer? Will ISO from MSDN source do? or it is just not possible??

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• How to change the MAC address in Win 8 to spoof a Roku Player through a WiFi splash page?

  - by luser droog

  My Linux laptop died yesterday and now I can't watch TV. Let me explain. I use a Roku Player to stream Netflix shows to my television; and a year or two ago, the Internet Service provided in my apartment complex added a Splash Page to get through the router and onto the net. After not too many days, I remembered that internet devices identify themselves with a MAC address. So I delved into the manpage of ifconfig and discovered that I could persuade my laptop to pretend to be the Roku Player, connect, click through the Splash Page, disconnect and change it back. This would allow the Roku to connect for about 24 hours, when I would have to do it again. But the laptop died yesterday during my smoke break. So during lunch, I ran to OfficeMax and got a new one. But I don't know where to begin looking for where to change the MAC address (assuming it's possible). I know I can try dual-boot, or a keychain OS, or possibly other things to resurrect my old method. But, is it possible to get Windows do it?

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• Skipping nginx PHP cache for certain areas of a site?

  - by DisgruntledGoat

  I have just set up a new server with nginx (which I am new to) and PHP. On my site there are essentially 3 different types of files: static content like CSS, JS, and some images (most images are on an external CDN) main PHP/MySQL database-driven website which essentially acts like a static site dynamic PHP/MySQL forum It is my understanding from this question and this page that the static files need no special treatment and will be served as fast as possible. I followed the answer from the above question to set up caching for PHP files and now I have a config like this: location ~ \.php$ { try_files $uri =404; fastcgi_cache one; fastcgi_cache_key $scheme$host$request_uri; fastcgi_cache_valid 200 302 304 30m; fastcgi_cache_valid 301 1h; include /etc/nginx/fastcgi_params; fastcgi_pass unix:/var/run/php-fastcgi/php-fastcgi.socket; fastcgi_index index.php; fastcgi_param SCRIPT_FILENAME /srv/www/example$fastcgi_script_name; fastcgi_param HTTPS off; } However, now I want to prevent caching on the forum (either for everyone or only for logged-in users - haven't checked if the latter is feasible with the forum software). I've heard that "if is evil" inside location blocks, so I am unsure how to proceed. With the if inside the location block I would probably add this in the middle: if ($request_uri ~* "^/forum/") { fastcgi_cache_bypass 1; } # or possible this, if I'm able to cache pages for anonymous visitors if ($request_uri ~* "^/forum/" && $http_cookie ~* "loggedincookie") { fastcgi_cache_bypass 1; } Will that work fine, or is there a better way to achieve this?

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• pgpool2+streaming replication failover on only 2 servers?

  - by aneez

  I am trying to configure pgpool2 and postgresql 9.1 to handle failover. I currently have streaming replication running, and are using pgpool2 for read-only load balancing. I have 2 servers in my setup, both running postgresql - 1 master and 1 slave. The master is also running pgpool2. My question is how do I configure this setup to handle failover? Specifically in the case that the master crashes, and the slave has to take over and run pgpool2 as well. Most documentation and examples I have been able to find assumes that pgpool2 is running on a separate server and thus "never" crashes. I may or may not be attacking the problem using the wrong tools. In my production setup I have a total of 3 identical servers all in independent locations. The main goal of the setup is to achieve a high uptime. Thus failover should be automatic, and bringing a failed node back up should cause only minimal downtime. I want all 3 nodes to be as close to identical as possible, and be able to run with just 1 or 2 nodes available. And if possible I want to use load balancing to improve performance. If anyone can help me gain some insight into how to do this using my current setup or suggest a different/better setup. Thank you!

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• Selecting whole column except first X (header) cells in Excel

  - by Robert Koritnik

  I know I can select all cells in a particular column by clicking on column header descriptor (ie. A or AB). But is it possible to then exclude a few cells out of it, like my data table headings? Example I would like to select data cells of a particular column to set Data Validation (that would eventually display a drop down of list values defined in a named range). But I don't want my data header cells to be included in this selection (so they won't have these drop downs displayed nor will they be validated). What if I later decide to change validation settings of these cells? How can I selection my column then? A sidenote I know I can set data validation on the whole column and then select only those cells that I want to exclude and clear their data validation. What I would like to know is is ti possible to do the correct selection in the first step to avoid this second one. I tried clicking on the column descriptor to select the whole column and then CTRL-click those cells I don't want to include in my selection, but it didn't work as expected.

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• Google Apps routing to different servers, depending on domain

  - by Philip

  We are investigating Google Apps for Education for our group of schools. Currently, each school uses their own Exchange (2003) server. Each school has its own domain which I have added to Google Apps as additional domains. I would like to start transitioning certain staff and some new pupils over to Google Apps to start testing. In this interim phase, I need mail to be routed through Google Apps and then, if no appropriate mail box is found, route on to the individual schools depending on the recipient. I do know that it is possible to route mail that does not have an appropriate Google Apps mail account to a single server - under "Settings / E-mail Settings / General Settings / Routing / E-mail routing". This works well for a single organisation where all the extra mail is destined for one place. I do know that it is possible to set up Routes, under "Settings / E-mail Settings / Hosts" and then use rules, found under "Settigns / E-mail Settings / General Settings / Routing / Receiving Routing". I can then filter based on e-mail domain and forward on to the necessary server. My problem with this, as I understand it, is that it ignores the users that have Google Apps accounts set up and sends all mail to the Exchange server. Are there any solutions for this predicament? Many thanks!

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• Driver corruption when deploying Dell Touchpad Drivers (with software) during imaging process

  - by BigHomie

  We're an sccm shop, and use it to deploy Windows. When deploying Dell laptops (multiple models), the touchpad drivers seem install properly, but the software doesn't. The resulting problem is that when the touchpad is pressed on occasion, the mouse pointer will 'jump' to certain points on the screen. A possible symptom of this problem/visible sign is if the touchpad icon isn't in the system tray. The software is in the control panel, but when opened part of the gui is pixelated, indicating botched install maybe? The manual resolution to this, is to go into device manager and uninstall the driver with the option to uninstall all driver software. After a restart, the driver and software is apparently reinstalled, and from there works as expected. Obviously this partially defeats the purpose of a zero touch deployment. If anyone knows why this is and/or a possible workaround, those answers would be valid as well. Barring that, I want to find a way to deploy the driver and touchpad software in an unattended way, so that it can be conditionally installing during the imaging process. To be honest I'm not sure how to troubleshoot this, I suppose I could try drvinst.exe to install the driver, but finding out why this fails initially would keep me from spinning my wheels.

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• solution for an offline server

  - by dashmug

  I'm trying to setup a development server at work that will ideally be able to test drive a couple of projects in PHP, Rails, or Django (not always running at the same time). I develop the apps locally on a Mac and then I'll put the projects up on this server for testing with my actual users (non-techies) before deploying to a production server. My problem is that we have a very poor internet connection (almost negligible) at work and doing the usual apt-get/yum/ports (make, clean, install) processes for setting up servers always get their packages from online repositories somewhere. I know I could probably download the source and then compile them myself but that's going to be too much of a hassle for me. I'm thinking about two solutions: Plan A: Run a server VM on my Mac and then use this VM as the source repository for the offline server. I've read about Ubuntu's apt-proxy and it seems to be good enough though I haven't tried it yet. I'm not sure if this is possible but can I simply do apt-get install nginx --downloadonly so that the package and its dependencies will be downloaded into my VM and my server can use the VM as the source repo for apt-get? Plan B: Run a server VM on my Mac (which I can setup/update easily when I'm home) and then clone the VM to the offline development server. Maybe I should simply make the server a VM host so I can simply copy the VM over. I think this is okay for the first-time setup but subsequent updates will take too long (cloning the VM image). If I was working on Windows, I imagine it'd be easier because most services have an installer file that I can download and then run at the server. If you could suggest another way, it would be much appreciated. Update: From Michael Hampton's answer, I found a possible solution which is apt-cacher. I also found this page on Ubuntu's website. I wonder if there is a better tool than this one.

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• How to stop split tunnelling over cisco VPN (OS X)?

  - by Notre

  I'm using OS X (Snow Leopard) and the built in Cisco IP Sec client to connect to my corporate VPN. Currently, everything works as designed, and desired for most people. However, I would like to be able to funnel all traffic (particularly all web browser traffic) through the VPN. (Note - I'm an end user here, not the network administrator). Is this possible? In searching around, most people are looking to do the opposite; break out the VPN and enable split tunnelling of data. I'd like to avoid the split tunnelling. Is there some setting I can make in my OS X client to make this happen? I ran across a post where routing table changes are made to force split tunnelling: how to force split tunnel routing on mac -> cisco vpn I'm thinking something similar to that might work, but I'm not a networking expert so I'm not sure where to start (or if it is even possible). Thank you! Notre

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• Combine multiple network interfaces to connect to a dedicated server

  - by Dženis Macanovic

  this is an underpaid employee writing, who's apparently responsible for all the IT stuff in a very small (non-IT) company. Today said company got a bunch of PCs/workstations, a switch, a computer that's supposed to be used as a router, two DSL connections (each 16 MBit/s downstream and 1 MBit/s upstream) and a dedicated server which is hosted and managed professionally by a larger local company with some decent connection speed (1 GBit/s both directions if I'm not mistaken). This is what I've set up (note I'm not making use of the second DSL connection at all)... ETH0 ETH1 [ SWITCH ]---[LINUX DEBIAN ROUTER]---[DSL MODEM 1]---[INTERNET] | | | PC1 | | PC2 | ... ... when my boss asked me, if it was somehow possible to get 32 MBit/s downstream and 2 MBit/s upstream. At that time I replied "no" without thinking too much about it. Now I've just had the following idea... ETH1 ETH0 ETH0 ,---[DSL MODEM 1 (NON-STATIC IP)]---, ,---, ETH0 [ SWITCH ]---[LINUX DEBIAN ROUTER] [INTERNET] [LINUX DEBIAN SERVER]---[INTERNET] | | | '---[ DSL MODEM 2 (STATIC IP) ]---' '---' PC1 | | ETH2 ETH0 PC2 | ... ... but I have absolutely no clue how to implement that. Would that even be possible? What would the masquerading rules look like on the router? What about the server? I didn't find anything on the internet, mainly because I couldn't come up with any good keywords to search for to begin with. English obviously isn't my first language. Thanks in advance for your time!

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• How to upgrade iPhone 3G to iOS 5 now that iOS 6 is out? [closed]

  - by mmmshuddup

  My friend has an old iPhone 3G and I wanted to upgrade it to iOS 5 because I had read that the performance is actually better with iOS 5 on that phone in spite of the difference in processor power. The problem is that now that iOS 6 is out, iTunes only gives me the option to upgrade to that. I am a little more leery of iOS 6 knowing that it was launched mostly for the iPhone 5 and since that phone has a way faster processor, I would assume that performance would be an issue on the iPhone 3G. How can I, if possible, upgrade just to iOS 5? Note: I would like to avoid having to jailbreak the phone by all means possible. (It's not mine and I don't want to take the risk with a phone that doesn't belong to me.) EDIT: If anyone knows of a good site to get help on questions like this let me know. Apparently you're allowed to ask questions about iPhones here, just not this. Which is completely utter asinine, but oh well. Anyone with helpful ideas, post in the comments please.

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• IIS 7: launch unique site instance per host name

  - by OlduwanSteve

  Is it possible to configure IIS 7 so that a single site with multiple bindings (or wildcard bindings) will launch a unique instance for each unique host name? To explain why this is desirable, we have an application that retrieves its configuration from a remote system. The behaviour of the application is governed by this configuration and not by the 'web.config'. The application uses its host name as a key to retrieve the configuration. Currently it is a manual process to create an identical IIS site for each instance of the application, differing only by the bindings. My thought, if it were possible, is that it would be nice to have one IIS site that effectively works as a template for an arbitrary number of dynamic sites. Whenever it is accessed by a unique host name a new instance of the site would be launched, and all further requests to that host name would go to that instance just as though I had created the site by hand. I use IIS regularly, but only for fairly straightforward site hosting. I'd like to know if this could be configured with vanilla IIS 7, but would also welcome answers that require a plugin or 3rd party product. Programming/architectural suggestions about changes to the app wouldn't really be appropriate for serverfault.

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• Script apparently changing file permissions on Mac OS to 000

  - by half_bit

  I wrote a little shellscript that helps installing a web application. The script itself just downloads a zip archive, extracts it and changes the permissions of the extracted files to the one needed to run the webapp. The problem now is that some users reported that after running my script, all the permissions of every file in their home directory or even on their whole computer changed to 000 (except the actual unzipped files which do have the correct permissions). The only lines in my script actually doing IO are these: URL="http://foo.com/" FILENAME="some.zip" curl --silent "$URL$FILENAME" -o $FILENAME > /dev/null echo "Unzipping...\c" if unzip -oqq $FILENAME > /dev/null then chmod -R 777 app/tmp app/webroot app/Config/database* app/configuration* chown -R www:www * rm $FILENAME echo "\t\t\tOK" exit 0 else echo "\t\t\tERROR" exit 1 fi I seriously can't explain this to myself. How can this even be possible? It is entirely possible that the users accidentally ran the script in their home directory, but that still wouldn't explain why the permissions where set to 000, not www/777.

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• Can I use squid (or anything) to do this?

  - by user269334

  I have a really crappy VPS, and a really good computer at my office (with a really good internet connection), but behind a NAT. Is it possible to expose my good computer by doing this: 1. The good computer connects to the VPS (and keeps the connection alive) 2. The users connects to the VPS, and sends http(s) requests to the VPS. 3. The VPS just passes that http(s) requests to the good computer (including some identifications, so the servers can distinguish connections) 4. The good computer passes that http(s) response to the VPS 5. In turn, the VPS receives the http(s) response, and passes back to the client. Is it possible to do this? (btw, the VPS and the good computer are located in different countries) And also, is this "reverse proxy"? I heard that reverse proxy is for protecting the internal network by putting a middle server. And will this affect SSL configurations? (or make SSL impossible?) I'm intending to run nginx on the good computer. Thanks in advance : )

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• Data recovery on working hard drive

  - by emgee

  So I have a 5 bay hot swap SATA enclosure that's connected to a Silicon Image-based SATA adapter in a computer. It's running XP Pro. There are two 1.5TB hard drives in slots 1 and 2 respectively, set up using RAID 1 using the the Silicon Image utility. There are also two 1TB drives in bays 3 and 4, also set to RAID 1 the same way. The partitions for both RAID arrays are Dynamic partitions. A few days back, there was a bare hard drive that needed some files copied off of, so it was popped it in bay 5, that bay to pass-through, and the copied data off of it. Later, I noticed that my 1.5TB drives no longer showed up in windows. In the Silicon Image utility, the drives showed up fine, no error. However, in Device Manager, it shows the RAID 1 array as uninitialized. It shows up as the right size, etc., but nothing else. There's no sign of anything wrong with either drive, so I'm not sure what happened exactly. I'm not the only one who has access to that computer, so it is possible there is something else done to it that I don't know of. There's quite a lot of data on it still, and if at all possible, I'd prefer to not send it to Ontrack. Does anyone know of software that would restore the partitions, keeping in mind that it's a Windows LDM partition? I have access to a variety of Operating Systems, so something that would work on Mac, Windows or Linux would be acceptable. The programs I usually use are not compatible with LDM.

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• How do you get linux to honor setuid directories?

  - by Takigama

  Some time ago while in a conversation in IRC, one user in a channel I was in suggested someone setuid a directory in order for it to inherit the userid on files to solve a problem someone else was having. At the time I spoke up and said "linux doesn't support setuid directories". After that, the person giving the advice showed me a pastebin (http://codepad.org/4In62f13) of his system honouring the setuid permission set on a directory. Just to explain, when i say "linux doesnt support setuid directories" what I mean is that you can go "chmod u+s directory" and it will set the bit on the directory. However, linux (as i understood it) ignores this bit (on directories). Try as I might, I just cant quite replicate that pastebin. Someone suggested to me once that it might be possible to emulate the behaviour with selinux - and playing around with rules, its possible to force a uid on a file, but not from a setuid directory permission (that I can see). Reading around on the internet has been fairly uninformative - most places claim "no, setuid on directories does not work with linux" with the occasional "it can be done under specific circumstances" (such as this: http://arstechnica.com/etc/linux/2003/linux.ars-12032003.html) I dont remember who the original person was, but the original system was a debian 6 system, and the filesystem it was running was xfs mounted with "default,acl". I've tried replicating that, but no luck so far (tried so far with various versions of debian, ubuntu, fedora and centos) Can anyone clue me in on what or how you get a system to honor setuid on a directory?

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• Accessing the partitions on an VLM volume

  - by projix

  Suppose you have an LVM volume /dev/vg0/mylv. You have presented this as a virtual disk to a virtualised or emulated guest system. During installation the guest system sees it as /dev/sda and partitions it into /dev/sda{1,2,5,6} and completes the installation. Now at some point you need to access those filesystems from within the host system, without running the guest system. fdisk sees these partitions just fine: # fdisk -l /dev/vg0/mylv Device Boot Start End Blocks Id System /dev/vg0/mylv1 2048 684031 340992 83 Linux /dev/vg0/mylv2 686078 20969471 10141697 5 Extended /dev/vg0/mylv5 686080 8290303 3802112 83 Linux /dev/vg0/mylv6 8292352 11980799 1844224 83 Linux However, the devices such as /dev/vg0/mylv1 do not actually exist. I guess that because they're within an LV, the OS does not recognise this type of nesting by default. Is there any way I can prod Linux so that /dev/vg0/mylv1 or equivalent appears and thus becomes mountable within the host system? I understand that it's possible with qemu-nbd, and will use this if necessary. However, I was hoping for something more direct if possible, rather than simulating a network block device and attaching that.

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