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• Prevent specific applications from being run as administrator

  - by Unsigned

  Background Most installation toolkits have the ability to launch, automatically or otherwise, external programs after installation. This is often appears in the installer via such options as "Show readme", or "Start program". Issue The problem is, many of these installers are poorly coded, and do not drop permissions appropriately. For example, starting the application automatically, or opening the application's homepage in the browser, often results in launching the application or browser with the installer's Administrative privileges, or a "High" UAC integrity level! This has the potential to open up security breaches, by opening up the installed application, or a web page (and possibly browser add-ons), that are now running with elevated permissions. (This is the reason I strongly recommend never choosing auto-launch options when installing software.) Question The question is: Is there a way to prevent certain applications (such as a web browser) from ever being launched with Administrative privileges, i.e., an automatic drop-privilege?

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• Will an SSD help prevent laptop overheating?

  - by alex

  My laptop has a severe overheating problem, even though it's quite new (< 6 month). It's still regularly overheating to the point where it shuts down. This usually happens while playing games but sometimes while watching videos or using Skype video calls for a long time. I'm already keeping it mid-air on a cooling tray with 2 external coolers, but that doesn't seem to help. The only other thing I can think of is installing an SSD instead of the current HDD. I've read up that they generate less heat then hard drives, but can it actually make a serious difference to the heat level of the laptop? If there are any other suggestions, please feel free to comment. The laptop is a Toshiba Satellite L650D-11R.

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• Run 2008 R2 Service under 2000 Domain Account

  - by NoDisassemble

  I'm trying to get a service to run under a domain account. When I try to add the account, I get the error The account name is invalid or does not exist, or the password is invalid for the account name specified I know the account exists and the password is correct. I am also having trouble adding it manually to the "Log on as a service" setting, I get the error An extended error has occured. Failed to save Local Policy Database After a day of research I'm starting to suspect it has to do with it being a 2008 R2 server trying to use a 2000 domain account. I've tried to change the LAN Manager authentication level and the Minimum session security looks okay per my Google digging. I'm not sure what else I can do?

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• Hosting solution for sensitive client data

  - by Mark

  Hello, We are developing a web application that will deal with highly sensitive (financial) data of clients (audience is medium to large sized businesses). Clients will be under scrutiny from regulators & auditors and, as such, we will be too. More importantly to give clients a level of comfort our application and related hosting arrangement should instill a lot of confidence with them. We are looking into using a cloud based service like Linode, Amazon EC2, etc. To allow for maximum flexibility We are keen on putting everything on virtual servers and avoiding having to buy our own hardware. Does a cloud based service make sense for our particular scenario? If not what type of hosting should we consider? If so what should we look out for? Thanks!

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• Remote Destkop into Server 2008R2 with Firewall On

  - by Eternal21

  I've got a fresh install of Remove Server 2008 R2, 64 bit. The problem is I can't Remote Destkop into it. I clicked 'Enable Remote Desktop' inside 'Initial Configuration Tasks', and set it to: Allow connections only from computers running Remote Destkop with Network Level Authentication (more secure). The thing is, this used to work just fine, and then it stopped. The only way I can get it to work now is if I turn of Windows Firewall completely off (Public network location settings). Obviously I don't want to run the server with firewall off, so what specific settings in Firewall do I need to disable, or am I doing something wrong?

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• Replacing explorer.exe under Windows 7

  - by Whitey

  A bit of an odd request I gather, but for reasons too deep to go into detail here I need to replace my explorer.exe in the C:\Windows directory. I have tried doing it myself, through the GUI and command prompt (ran as administrator) but I get access denied. It seems that being an admin on your machine is not the highest permission level after all, and only Trusted Installer can modify the file. Does anybody know a way that works? I was about to boot into safe mode and try it but wanted to get some feedback before I do anything in-depth. Thanks.

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• Missing files when Windows 7 returns from hibernate w/ dual boot

  - by Arthur N

  I have a dual-boot setup with Ubuntu (lucid) and Windows 7. I have the Windows file system shared on Ubuntu through Samba. Occasionally, I am working on Windows and my machine will go into hibernate (i.e. when the battery level is critical). By default, my GRUB settings boot me into Ubuntu. So when I get back to my PC, sometimes I just hop into Ubuntu instead of going back to Windows. However, if I write any files to the Windows file system during that Ubuntu session, the next time I do go back to Windows (which resumes from hibernate), those files are missing. Obviously, the state of the actual file system and the hibernate snapshot become out of sync, and Windows chooses the hibernate snapshot, overriding any changes I may have made thru Ubuntu. For now, I've disabled the hibernate option in the Windows power settings, but is there any utility I can use to get back some of those missing files?

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• migration of physical server to a virtual solution, what i have to do?

  - by bibarse

  Hello I'm new in this forum, so i would like that you forgive me for my blissfully and my low English level. I'm a trainee in company one month ago, and my mission is to migrate 3 physicals servers to a virtualization technology. The company edit softwares for E-learning so there are lots of data like videos, flash and compressed (zip). This is some inventory of the servers: OS: Debian, 2 redhat, apache, php/mysql, sendMail/Dovecot, webmin with virtualmin template to create dynamically the web sites because there is no sysadmin ... The future provider will be responsible of to secure, update and create the virtual machines (outsourcing) and with a RedHat OS's. So i want that you help me to choose a virtualisation technologie (for the i prefer KVM of Redhat RHEV, VMWare is expensive), how evaluate the hardware needs (this for evolution of 4 or 5 years) and to elaborate a good planing to don't forget any think. Thank you for your responses.

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• How do you assign resources and keep begin, end and duration of a task intact?

  - by Random

  I have problems with assigning more than one resource to a group of tasks. The idea is simple, my tasks are in one group and are manually scheduled to particular begin and end dates. I want to assign more than one resource to keep task duration and dates (fixed duration) and increase work. For top level tasks it works fine but as long tasks are grouped, the duration of each is extended to reach group end date and work remains. For the problematic tasks, the Gantt chart looks like this: One resource attached (good) ( Task 1.1 ) ( Task 1.2 ) (Task 1.3) More than one resource attached (wrong) ( Task 1.1 )....................... ( Task 1.2 ).......... (Task 1.3) So for tasks like that, I want to have a fixed schedule and just increase work by adding resources that work in the same time, but sometimes MS Project does leveling to do resources work sequentialy.

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• How can I monitor ports on Windows?

  - by Olav

  What is the simplest way on "local" (1*) Windows, for known ports, to: Find out if it is used. Find out as much as possible about what is behind the port. Find out as much as possible about traffic through the port. Find out if something else is interfering with the port and traffic to it. I have used Fiddler in the past, but I think that's mostly HTTP? I don't if Wire-shark does more? I think there is a tool closely integrated with Windows? Which one? (5). I am looking at NMap, but its seems to be more a suite of tools, and a high entry level. 1*: Primarily this is for what happens inside my Windows Machine, but if necessary, I can for example use a VM, or the wireless connection.

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• Small WiFi Network In a Noisy Environment

  - by Sam Skuce

  My company is demoing our network enabled products at big conferences. For this purpose, we would like to be able to set up a small WiFi network in our booth with a range of less than 10 meters. We will only be connecting the device that we are demoing and the iPad or PC running our demo software. I understand that there are conferences that won't allow you to run your own WiFi equipment, but some fairly big ones do (e.g. IMTS, which we were just at). I know that the AP should be encrypted and not broadcast its SSID, but are there additional equipment considerations to deal with the high level of RF noise in such an environment? Is there a particular technology that I should be looking at?

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• .htaccess rules not working, but the file seems to be loaded

  - by user221877

  I am trying to remove .php at the end of the URL from any page thats loaded. RewriteEngine on RewriteCond %{REQUEST_FILENAME} !-d RewriteCond %{REQUEST_FILENAME}.php -f RewriteRule ^(.*)$ $1.php Its running on my own server, which has WHM/cPanel, so I can change settings at the server level, I'm just not really sure what I'm looking for. I found the httpd.conf file, but it said it was auto generated by whm, so I tried looking in whm for the correct settings but it had barely any settings related to htaccess. If I fill htaccess with gibberish it stops the site from loading, which I assume means that the .htaccess file is being loaded, so I'm not sure what the issue is.

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• SSL encryption standards by browser

  - by hfidgen

  Hiya, Does anyone have a table of the default levels of encryption which the various browsers out there support? For instance I know that IE5 and lower struggle even to cope with 40 bit encryption but the latest browsers easily do 256 and beyond. The reason I ask is that I'm looking to get a wildcard certificate for my domain and the price difference is huge between a server gated certificate (where it enforces a minimum of 128bit) and a non-gated certificate (where the browser sets the encryption level). Obviously I like the idea of paying £300 less for the non-gated certificate, but only if I can be sure that the majority of my users (FF3 / Opera / Chrome / IE7+) are going to get good encryption.

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• How do communcations through ports works

  - by user71866

  I was studying socket programming and certain questions came to my mind. These are some beginner level doubts Is it mandatory to to use well known port for a particular application. For example if i am using ssl, can i design a server to listen on 1000 rather than 443. For http we are connecting to port 80 from some other arbitrary port. Whys no port 80 to port 80 communcation. how a server responds to connections coming to it from different ports to its port 80. how many connections are possible to a particul

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• In a virtual machine monitor such as VMware’s ESXi Server, how are shadow page tables implemented?

  - by ali01

  My understanding is that VMMs such as VMware's ESXi Server maintain shadow page tables to map virtual page addresses of guest operating systems directly to machine (hardware) addresses. I've been told that shadow page tables are then used directly by the processor's paging hardware to allow memory access in the VM to execute without translation overhead. I would like to understand a bit more about how the shadow page table mechanism works in a VMM. Is my high level understanding above correct? What kind of data structures are used in the implementation of shadow page tables? What is the flow of control from the guest operating system all the way to the hardware? How are memory access translations made for a guest operating system before its shadow page table is populated? How is page sharing supported? Short of straight up reading the source code of an open source VMM, what resources can I look into to learn more about hardware virtualization?

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• Utility to record IO statistics (random/sequential, block sizes, read/write ratio) in Unix

  - by Michael Pearson

  As part of provisioning our new server (see other SF) I'd like to find out the following: ratio of random to sequential reads & writes amount of data read & written at a time (pref in histogram form) I can already figure out our reads/writes on a per-operation and overall data level using iostat & dstat, but I'd like to know more. For example, I'd like to know that we're mostly random 16kb reads, or a lot of sequential 64kb reads with random writes. We're (currently) on an Ubuntu 10.04 VM. Is there a utility that I can run that will record and present this information for me?

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• Book Recommendations for Technical/Solutions Architecture [closed]

  - by giant_squid

  I wish to learn more about Technical and Solutions Architecture. Specifically, I'm concerned with designing HA, Fault-Tolerant Scalable web-based solutions (enough buzzwords ;-). Its a topic I'm familiar with on a technical level having worked as a sysadmin, but I don't know all the buzzwords Architects use and have to brush up on my UML and diagram techniques. I would like a book that describes what architecture is as a discipline and explores standard design patterns, and some do's and don'ts. Do you have any recommendations? I apologise if this sounds vague, its because I am still learning what Architecture is as a discipline having come from a sysadmin background. To be 100% clear I'm looking for books or websites that give broad overviews of what System Design patterns exist and how the discipline works. Thanks Instead of closing the question maybe you could comment on what exactly about it you don't like.

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• Our company has 100,000s+ photos, how to store and browse/find these efficiently?

  - by tobefound

  We currently store our photos in a structure like this: folder\1\10000 - 19999.JPG|ORF|TIF (10 000 files) folder\2\20000 - 29999.JPG|ORF|TIF (10 000 files) etc... They are stored on 4 different 2TB D-link NASes attached and shared on our office network (\\nas1, \\nas2, and so on...) Problems: 1) When a client (Windows only, Vista and 7) wishes to browse the let's say \\nas1\folder\1\ folder, performance is quite poor. A problem. List takes a long time to generate in explorer window. Even with icons turned off. 2) Initial access to the NAS itself is sometimes slow. Problem. SAN disks too expensive for us. Even with iSCSI interface/switch technology. I've read a lot of tech pages saying that storing 100 000+ files in one single folder shouldn't be a problem. But we don't dare go there now that we experience problems on a 10K level. All input greatly appreciated, /T

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• Prevent applications from being run as administrator

  - by Unsigned

  Background Most installation toolkits have the ability to launch, automatically or otherwise, external programs after installation. This is often appears in the installer via such options as "Show readme", or "Start program". Issue The problem is, many of these installers are poorly coded, and do not drop permissions appropriately, for example, opening the application's homepage in the browser... launching the browser with the installer's Administrative privileges, or a "High" UAC integrity level. This has the potential to open up security breaches, by opening up a webpage (and possibly browser addons), that are now running with elevated permissions. Question The question is: Is there a way to prevent certain applications (such as a web browser) from ever being launched with Administrative privileges, i.e., an automatic drop-privilege?

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• Imap subfolders not shown in list command - perhaps acls misconfiguration

  - by mschenk74

  My goal is to copy the whole folder structure with all mails from one imap account to another. The tool I am using for this is imapcopy (the java based version from code.google.com since the unix/linux tool packaged with debian doesn't support imaps). Now, there is one problem: The tool only copies the top-level folders and not the nested ones. To narrow down the problem I have downloaded the source code of imapcopy and debugged into the code. There I noticed that the folder.list() (which is mapped to the list "%" imap command) returns an empty list. But when I do a getFolder(<subfoldername>) I can access those subfolders. After reading some documentation about the features of imap I think that the problem might be some misconfigured ACLs which prohibit the listing of those folders but allow to read ad write to them. How should I check this ACLs? which tools do I need for this task?

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• IP packet proxy solutions? Riverbed alternative

  - by Ruvan

  I have stumbled upon Riverbed.com's products which basically has the capability to hash chunks of IP data and subsequently store them to disk. I'm looking for an open source / cheaper alternative. WANProxy is the exact equivalent except that it only keeps data in-memory and can't store the data to disk which is a requirement for our solution. I'm basically looking for a proxy which not only looks at the files (filenames) but the data itself being transmitted at the packet level. Anyone? Thanks!

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• Fed up of Server Admin - Want career change guidance

  - by JB04

  Hi All, I am SA in top level MNC and what I liked turned out to be my most disliked. I feel that I am capable of doing more than what I am doing at present. This 1 hour , 2 hour SLA is not my kind. I wanna get a better life.. The rotational shift is also something I am hating these days. Awkward shifts and too many process to follow. I have 3 years of Experience. I dont wanna waste this 3 yrs of experience I wanna get into OS developer or kind of so that this three years of experience is not wasted !! Please help me out

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• How do you do the offsite hard drive backups?

  - by kentchen

  I have been doing hard drive backups for a while, which I believe a lot of you guys do as well, but am having trouble figuring out a better way storing them offsite. I am wondering how you guys out there do that. Any policy or tips & tricks when it comes to offsite store your backups, mainly hard drives not tapes. Thanks in advance. [update] Thanks for mentioning the online backup. We are actually in the middle of this process. And I 100% agree that it's the ultimate way to go. However, considering the cost, sometimes it may not be the option, as it's a quite expensive option if you also consider the application level. I guess online backup can be a very good one in the separate topic. :)

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• VLC Caching levels

  - by Svish

  When I open the Preferences of VLC and go to Input & Codecs, I have a setting called Default Caching Level. I can choose between Cusom Lowest latency Low latency Normal High latency Higher latency I'm used to caching being set in seconds or something like that. So, more seconds/higher buffer means less chane of buffer underrun while streaming. What is latency? What does it mean to set it lower or higher? In what cases should I go in what direction? If I'm struggling with buffer underruns, should I set it to lower or higher latency?

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• Enterprise Data Center System Admin/Engineer to Server Ratio

  - by Bob

  I know there have been similar questions asked over the last few months however looking at a Data Center Operations and know there are some really smart people out there that might be able to help. Looking for some staffing best practices based on first hand experience and was hoping that there is some experience in this area that can provide "best practice" application: Three High Availability (99.99% plus) Enterprise Level Data Centers geographically dislocated, one manned 24x7x365, one lights out, one co-location running HOT-HOT-HOT supporting a global community. More than 2,000 operating systems consisting of 95% Windows, 5% Linux and Solaris, 45% virtualized, more than 100TB storage. No desktop support, no Network Administration (administrated separately), running N+1 and serving more than 250 Billion page views annually. Based on experience what has been your experience with Server to "Data Center System Administrator/Engineer" ratio? Thanks in advance for your responses.

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