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• Windows 8 Radeon update broke some games

  - by Andrew

  I've been using Windows 8 Consumer Preview 32-bit on my desktop for months, and recently did a software update through Windows Update. An update for my Radeon HD 5450 driver (Catalyst) to WDDM 1.2 was in the list of updates, and installed. When I went to play CS:GO and discovered that when loaded, it would not display the GUI (menus, sometimes even the background) after a few seconds of flickering GUI. I can still navigate the menus 'by feel' and connect to and play on servers, but have no GUI, no buy menu, no map, no cross-hairs, no health indicator, etc. I have tried CS:S, which works, and Borderlands, which doesn't even load the intro videos before the first menu screen. I've tried re-installing Catalyst from the AMD website, and the beta, and tried uninstalling and reinstalling CS:GO. The problem with it (and Borderlands) still happen. What broke, and how can I fix it? I'll be reinstalling soon anyway to dump Windows 8 back to 7, but would like to be able to game until then.

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• Mono on Linux: Apache or Nginx

  - by Furism

  Hi, I'm developing an ASP.NET application that will be run under Linux/Mono for various reasons (mostly to stay away from IIS, quite frankly). Of course the first web server I had in mind was Apache. But Apache, for all its advantages, adds a lot of overhead. Also, the application I'm building needs to be highly scalable and performance is one of the main concern. Apache has, obviously, a very good reputation and its record speaks for itself, but I don't need things like Reverse Proxy or Load Balancing because dedicated network devices would be used for that. So those modules from Apache will never be used. So basically my question is: since Nginx seems to fit exactly needs, is there any caveat I should be aware of? For instance, is Nginx renowned to be particularity safe? When security flaws are detected, how fast are they patched? Any insight on the pros and cons of using either of those servers in conjunction with Mono is welcome.

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• LVS TCP connection timeouts - lingering connections

  - by Jon Topper

  I'm using keepalived to load-balance connections between a number of TCP servers. I don't expect it matters, but the service in this case is rabbitmq. I'm using NAT type balancing with weighted round-robin. A client connects to the server thus: [client]-----------[lvs]------------[real server] a b If a client connects to the LVS and remains idle, sending nothing on the socket, this eventually times out, according to timeouts set using ipvsadm --set. At this point, the connection marked 'a' above correctly disappears from the output of netstat -anp on the client, and from the output of ipvsadm -L -n -c on the lvs box. Connection 'b', however, remains ESTABLISHED according to netstat -anp on the real server box. Why is this? Can I force lvs to properly reset the connection to the real server?

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• How can I connect to a Windows server using a Command Line Interface? (CLI)

  - by HopelessN00b

  Especially with the option to install Server Core in Server 2008 and above, connecting to Windows servers over a CLI is increasingly useful ability, if not one that's very widespread amongst Windows administrators. Practically every Windows GUI management tool has an option to connect to a remote computer, but there is no such option present in the built-in Windows CLI (cmd.exe), which gives the initial impression that this might not be possible. Is it possible to remotely management or administer a Windows Server using a CLI? And if so, what options are there to achieve this?

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• SBS 2011 backup

  - by Chris

  I have a freshly installed SBS 2011 server that I need to configure for backup. I tried using the SBS backup configuration tool, but it didn't want to use anything but an external drive. Previously, with our W2K3 servers, I used NTBackup to back up the server to disk and then copied the backup files to a remote server on a regular basis. It doesn't appear this is possible with the built-in backup tools in SBS 2011. Am I missing something? What other options are there that won't cost an arm and a leg?

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• Ubuntu server failing daily

  - by deanvz

  Symptoms: Server becomes unresponsive - Increase in load, all services stop Loss of connectivity - Ping/SSH Flush MySQL hosts after reboot - As MySQL refuses new connections Intermittent Apache crashes Generally happens early morning hours - 2 days of the week are however excluded Changes made: Updated the OS - to Ubuntu 10.04.4 LTS Not sure if the MySQL server was also updated in the process Current MySQL version - mysql Ver 14.14 Distrib 5.1.63, for debian-linux-gnu (x86_64) using readline 6.1 Updated Plesk from 10.4.4 Update #47 to 11.0.9 Update #23 Rebooted on almost daily basis All crons stopped for the times corresponding to the server crashes Created a MySQL log to monitor the lock times on queries Possible causes: Failing hardware Incorrect software configuration (MySQL, Apache etc) Responsibilities: Small webserver Runs our billing system - WHMCS Responsible for CRONs Bulk-email solution - No delivery times coincide with server crashes Proposed solutions: Move machine over to VM Format and restore the Plesk server backup and take it from there? Side notes: Seems to be a general Apache failure across all our linux servers - Intermittent problem Are we doing something fundamentally wrong in the Apache config? (I understand that this is a secondary question, just making sure that it isnt possibly holding any relevance)

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• Multiple domains, one config, hosted on apache2

  - by Kristoffer Sall Hansen

  First a quick disclaimer, I'm not a 'server guy' or a 'unix pro' or anything like that, I'm a web programmer who got stuck doing server works since I ran linux (ubuntu) on my netbook. I'm trying to set up an apache server running on Debian to automagically serve multiple domains, each domain needs to have its own directory in /var/www. Since this is the last thing I do for this company I really need it to be easy for my successor (who is even more a beginner at servers than I am), to create more domains without having to muck around with ssh or /etc/apache2/sites-available, so what I'm looking for is basically any magic mumbo-jumbo in default (or apt-get, or conf.d) that makes the server start serving any domain that has a matching folder in /var/www they will ofcourse have to initiate domain transfers the usual way. I have no problem setting up domains individually. Ick... hope the above makes sense to someone.

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• Install DC again after removing on exchange server

  - by Kawharu

  I had a DC and Exchange 2010 installed on the same machine. I removed the DC role, and Exchange server went crazy. I tried to install the DC role again to fix the problem but ran into this error when running DCPROMO: Active Directory Domain Services could not create the NTDS Settings object for this Active Directory Domain Controller CN=NTDS Settings,CN=DC1,CN=Servers,CN=Manukau,CN=Sites,CN=Configuration,DC=AccessGroupnz,DC=com on the remote AD DC Server1.AccessGroupnz.com. Ensure the provided network credentials have sufficient permissions. "The DSA operation is unable to proceed because of a DNS lookup failure." Do you think I need to run this in an elevated command prompt, or change credentials somewhere to domain admin? Or is it something else?

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• Ideas for campus Internet Login mechanism?

  - by miCRoSCoPiCeaRthLinG

  Hello, I work at this university and I'm seeking an effective solution for an internet login mechanism. We have a leased-link at our campus, which is shared by both staff & students. All systems (desktops + laptops + handhelds) connect to the internal network via wifi and can then get onto the net. However, a local govt. regulation requires us to keep track of individual internet usage and hence we need a solution (pref. free / opensource) that'll enable us to implement some sort of an authentication mechanism once a user hooks onto the network. One requirement is that the software should be able to authenticate either against LDAP or some other custom user database (MySQL based) or both. Can anyone suggest any such software or mechanism? Most of our servers are Linux based... so something that runs off such a platform will be good. Thanks, m^e

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• NGINX + PHP FPM connect() failed (110: Connection timed out) while connecting to upstream

  - by Leonard Teo

  We're running a fairly large site using nginx and PHP-FPM and we're getting a lot of errors as the site load is quite high. We're getting "connect() failed (110: Connection timed out) while connecting to upstream"...upstream: "fastcgi://127.0.0.1:9000" Here's my config file for PHP-FPM. PHP-FPM: [www] listen = 127.0.0.1:9000 listen.allowed_clients = 127.0.0.1 user = nginx group = nginx pm = dynamic pm.max_children = 100 pm.start_servers = 20 pm.min_spare_servers = 5 pm.max_spare_servers = 35 pm.max_requests = 100 slowlog = /var/log/php-fpm/www-slow.log php_admin_value[error_log] = /var/log/php-fpm/www-error.log php_admin_flag[log_errors] = on What's the recommended config/number of servers/children for a high traffic site? We tried using Unix Sockets instead of TCP and got no noticeable improvements. Right now the errors are: connect() to unix:/var/run/php-fcgi.sock failed (11: Resource temporarily unavailable) while connecting to upstream...upstream: "fastcgi://unix:/var/run/php-fcgi.sock:"... Thanks, Leonard

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• How to configure LAN IP Filter on Huawei E586 UMTS Modem

  - by Mose

  I need to prevent clients of an Huawei E586 UMTS to WiFi modem from downloading much data from specific servers eg. Windows update or OSX update. On the config page of the device there's an "LAN IP Filter" which seems pretty good but I can't figure out the right settings. The mask looks like this: The help pages states the following: My problem with this is, I want some wildcard for the local ip and port. In my opinion the help page can not be correct by "lan port: enter 80" because the source port is normally dynamic. I tried to set it up like stated there but as expected it doesn't work. As wildcards I tried * and "ALL" but nothing worked as it prevents me from saving settings with an "wrong value" error. Any suggestions? Thanks in advance!

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• How to tell if PAE is hurting me?

  - by James

  I have a couple of servers with 20-30 GB RAM that are running (a variant of) RHEL4. They are currently running the SMP i386 kernel, not x64, not even the hugemem kernel. This means LowMem is confined to < 1G, and thus dentry_cache and ext3_inode_cache to 100M or so each. How can I tell if this is a problem? Here's a typical vmstat report while it's compiling some Java: $ vmstat 10 procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu---- r b swpd free buff cache si so bi bo in cs us sy id wa 1 1 0 19493816 394740 922420 0 0 1058 2292 1491 1020 6 3 80 12 2 1 0 19519480 395244 850156 0 0 1179 1412 1329 1195 9 4 75 12 1 1 0 19557368 392616 828344 0 0 1783 1680 1498 1756 14 5 72 9 I don't like the way bi is nonzero when there is so much memory free. I imagine slabtop could point more directly to the problem but I don't really understand how to interpret its output.

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• Whatsup gold reporting

  - by rotard

  I work for an IT consulting company, and we use WhatsUp Gold to monitor our and our clients' servers. WUG works, and provides all the data we need in a reasonably useful format. However, management wants to use it as a sales tool. They want more attractive reports that they can hand off to clients and prospective clients to show off how slick our monitoring software is. Is there a third-party solution that will generate more attractive reports based on data in the WUG database? I have already suggested using reporting services to build our own reports, but that idea was rejected.

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• Light Voip and IM server for small teams

  - by Sihan Zheng

  So I have a small group that would need a self hosted Im/voip and possibly video conferencing solution. My goal is for a small group of people (no more than 40) to be able to collaborate within a local area network. I need something that is self hosted, so unfortunately outside solutions like Skype and hosted Lync would not work. I'm looking for something that would allow both one on one, and group communication, so and IRC server would not work. I'm hopefully looking for something that does not require multiple servers, or is too complex to set up. As a student, I have a license of Lync 2013, but setting that up on a single server without active directory is practically impossible. Would Lync 2010 be easier to do on a single server? Are there any other good solutions? Thanks

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• unable to get local issuer certificate - Ubuntu 11.04

  - by user1443867

  I'm facing a strange issue. My vps from Linode has no issue connecting to apple push server with following command. openssl s_client -connect gateway.sandbox.push.apple.com:2195 -cert Test_dev_apns_cert.pem -key Test_dev_apns_key.pem However, I was using the same pem files with above command testing from my another low budget vps and I'm getting this: Verify return code: 20 (unable to get local issuer certificate) Both are running Ubuntu 11.04 and installed LAMP as usual. No special configuration is done to both servers for SSL. Am I missing something here?

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• How can I speed up my Windows Server 2008 VPN Connection?

  - by Pure.Krome

  So I've installed VPN service that comes with Windows Server 2008. Works perfectly, etc. When a client remote desktops to one of the private servers at the office, via VPN .. it's pretty slow. Now - how long is a piece of string? So before I get all the obligatory checks, I'll list the things from Mr. Obvious: Our modem/router (fritz!box) has a data/graph that shows incoming and outbound bandwidth. Both directions are barely getting used when a client has RDP'd via VPN. Our office internet connection is running at 21,9 Mbit/s download 1,3 Mbit/s upload. I feel like it's maxing at .. modem speeds ?? Is there any tricks I can do to confirm this and possibly even fix this?

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• Where does apache store initialization state for mod_proxy_balancer

  - by khoxsey

  I run apache2 on Ubuntu as a caching load-balancing reverse proxy in front of a group of application servers. I have noticed that the balancer maintains some state for some of the attributes visible in /balancer-manager such as whether an IP is enabled/disabled, load factor, etc. My site has periods of high (and low) usage, and recently as I added a new server to the working group I noticed that the load balancer picked up the new server but had it set to Disabled. I'm curious where that data is stored, and/or how it is initialized.

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• Why are Linux-based operating systems considered safer than Windows?

  - by echoblaze

  I hear that Linux-based systems are better for security. Apparently they don't have viruses and do not need antivirus software. Even my university claims this - they refuse to have Windows on their servers, which is a real shame because we wanted to use the .NET framework to create some websites. The only reason I can see Linux being safer is because it's open-source, so bugs theoretically would get caught and fixed sooner. I know a bit about how operating systems work, but haven't really delved into how Linux and Windows implement their OS. Can someone explain the difference that makes Linux-based systems more secure?

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• How to setup a new website with Amazon EC2?

  - by ElHaix

  For a new EC2 instance, I setup a windows server with IIS. I added the Amazon name servers to my on my domain, and configured an elastic IP pointing to the server. I know this is working as I use this for RDC. On the server, I added the website tied to the IP address, and used the quicklink security group that has port 80 open. However, whenever I try going to the URL, I pretty much get nothing, and not sure where the blockage is occurring. Any suggestions? Thanks.

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• ms sql 2005 server role problem

  - by Brandon

  On one of our sql 2005 servers we are no longer able to give any users server roles (ex. sysadmin). It appears to be successful both through the UI and through code. But when we check in the db and in the UI the role is unchecked and not shown for the user in the master db. Permissions don't seem to be the issue as we are testing this as system administrator levels of access. There are also no errors in the log. Any ideas? Thanks, Brandon

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• NFS Client reports Permission Denied, Server reports Permission Granted

  - by VxJasonxV

  I have two RedHat 4 Servers. The client is 4.6, the server is 4.5. I'm attempting to mount a share from the server, onto the client via NFS. The /etc/exports configuration is as follows: /opt/data/config bkup(rw,no_root_squash,async) /opt/data/db bkup(rw,no_root_squash,async) exportfs returns these (among other) shares, nfs is running according to ps output. I've been attempting to use autofs on the client, but have opted to just mount the share manually considering the issues I'm having. So, I issue the mount request: mount dist:/opt/data/config /mnt/config mount: dist:/opt/data/config failed, reason given by server: Permission denied Ok, so let's see what the server has to say for itself. May 6 23:17:55 dist mountd[3782]: authenticated mount request from bkup:662 for /opt/data/config (/opt/data/config) It says it allowed the mount to take place. How can I diagnose why the client and server are disagreeing on the result?

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• MySQL-5.5.10 - Lost connection to MySQL server during query (Both Web Clients and MySQL Slaves)

  - by kwiksand

  We've just upgraded our existing MySQL5.1 DB servers to newer (much better) hardware with MySQL 5.5, and things have been going mostly smoothly for almost 6 weeks. Just the last few days, I've noticed a few errors, such as: From a MySQL Slave: [ERROR] Error reading packet from server: Lost connection to MySQL server during query ( server_errno=2013) Or From Apache/Other: Lost connection to MySQL server at 'reading initial communication packet', system error: 110 At one point this evening, many webnodes reported this error for a three minute period (many such reports as this was in a busy period). However, the issues don't appear to correspond with any times of extreme load. For all intents and purposes, the connection/thread load on MySQL is at a normal rate (between about 10 and 40 connected threads), and Web load has been a LOT higher at times over the last few weeks. Could there bee other reasons for these connection errors, that I'm not seeing?

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• Engineers are using explosives to remove hard rock outside our office building. What countermeasures should we take?

  - by Karrax

  Our building is located approx. 100 meters from the explosive charges. They happen several times per day, and really shake the entire building a lot. This is going to go on for many days and the blasts are supposed to get stronger. Our server rooms are nothing fancy; one of them has all the racks on hard concrete while the other one has a raised floor (the one which allows the cables to go beneath it). Does anyone have any tips, countermeasures or best practices for us? Currently we are thinking of the following countermeasures: Daily report of the server rooms status lights (HD lights, power supplies and so on). Nightly check disk scan on the most important servers Order in extra supply of spare harddrives Edit: Many good answers here! However one needs to be accepted. The highest voted answer at the time of this edit will get their answer accepted.

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• How to make a pxe bootable 10MegaByte or larger dos image?

  - by rjt

  Would like to make a "massive" DOS floppy disk image, say 10MegaBytes or more containing all the firmware updates i need for any system, harddrive, BIOS. i do not need the DOS image to be networkable as everything will be on the PXE booted image, but networking would be nice. Since ZipDisks were attached to the floppy disk controller and were over 100MegaBytes, this should be possible. i tried a long time ago to do this and spent too much time on it only to have it fail to boot. So if someone has reliable instructions on how to create such a nightmarish beast and edit it, please let me know. One image that can used for PXE and copied to a USB stick would be a plus. Too bad manufacturers don't supply a single bootable Linux ISO containing all their firmware updates, that would be easy to boot over-the-lan and have networking. HP servers do this and it is awesome.

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• Exclude IPs from FQDN Resolution

  - by Jon Rauschenberger

  Is there a way to EXCLUDE IPs on an interface from FQDN resulution? Here's my use case; I have a domain joined Windows Server 2008 R2 machine that hosts multiple Web sites. We ahve DNS A records for the various sites that resolve to different IP addresses. I've added those IPs to the single NIC in the machine and the sites work just fine. The problem is that the FQDN of the machine now resolves any of the IPs on the machine. I only want the primary IP associated with the FQDN on the internal DNS servers. Is there ANY way to accomplish this? jon

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