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• Creating reverse DNS entries which resolve [closed]

  - by Tiffany Walker

  Possible Duplicate: Reverse DNS - how to correctly configure for SMTP delivery I ran a DNS check and ended up with the following error: FAIL: Found reverse DNS entries which don't resolves IP-IP-IP-IP.HOST.DOMAIN.TLD ? ??? All IP's reverse DNS entries should resolve back to IP address (MX record's name -> IP -> IP Reverse -> IP). Many mail servers are configured to reject e-mails from IPs with inconsistent reverse DNS configuration. How do I properly configure and it so it goes to an IP?

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• Windows 8 won't boot after Boot Repair

  - by Rudolph Gottesheim

  I've got a Sony Vaio laptop. Until yesterday I had Windows 7 and Ubuntu 12.04 installed. Today I upgraded to Windows 8, which killed my OS selection screen. So I booted to Ubuntu 12.10 from a USB stick and ran Boot Repair. This recovered the GRUB screen and let me boot into my Ubuntu 12.04 installation, but now I can' boot Windows 8. When I select the option that booted Windows 7 before, it looks like it wants to start Windows 7 (sic) again (black screen, with the text "Windows is loading" or something), but then reboots the machine after a few seconds. I'm sure Boot Repair can fix this, but I know far too little about the whole booting thing to know the right settings for it. Here's my boot repair report thing.

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• How can I uninstall AppFabric?

  - by downatone

  I recently upgraded from Win 7 - Win 8. AppFabric was not one of the programs that came up as being incompatible when I ran the upgrade wizard, so I did not uninstall it. Now whenever I goto "Add or remove features" I get the following error: --------------------------- Windows Server AppFabric Setup Wizard --------------------------- Windows Server AppFabric is not supported on current operating system Windows 8 Pro(version 6.2.9200.0). Please refer to installation guide for the list of supported operating systems. --------------------------- OK --------------------------- Unfortunately the only way to uninstall AppFabric is via the "Add or remove features" - does anyone know a commandline command to kick the uninstall so I can at least access "Add or remove features"? Edit: C:\Windows\System32\AppFabric\Setup.exe /remove Throws the same error as above.

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• Run a MongoDB configuration server without 3GB of journal files

  - by Thilo

  For a production sharded MongoDB installation we need 3 configuration servers. According to the documentation "the config server mongod process is fairly lightweight and can be ran on machines performing other work". However, in the default configuration, they all have journalling enabled, and with preallocation this takes up 3 GB of disk space. I assume that the actual data and transaction volume of a config server is quite small, so that this seems a bit too much. Is there a way to (safely!) run these config servers with much less disk use for the journal? Do I need journalling at all on config servers? Can I set the journal size to be smaller?

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• Windows 2008 R2 Scheduled Task Not Running With Admin Privileges even if granted?

  - by j.rightly

  I have a scheduled task that is running as USER. I have checked the box "Run with highest privileges" in the scheduled task properties. The task is a powershell script that, among other things, reboots the system. The script executes and runs normally, but as a scheduled task, it fails to reboot the system. Here is the kicker: When I manually run the script as USER using the exact same command line as what's in the scheduled task, the script still runs but this time it actually reboots the system. I have UAC disabled and USER is a member of the local Admins group. The local Admins group has the right to shut down the system. Nothing in the event logs offers any clues. Why would the same script running under the same credentials work interactively but not as a scheduled task? UPDATE: This is too weird. When the task ran on schedule, everything worked normally.

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• RAID Array performance on an HP Proliant ML350 G5 Smart Array E200i

  - by Nate Pinchot

  We have a client who is complaining about performance of an application which utilizes an MS SQL database. They do not believe the performance issues are the fault of the application itself. The Smart Array E200i RAID controller has 128MB cache and we have the cache set to 75% read/25% write. The disk array set to enable write caching. Recently we ran a disk performance test using SQLIO based on this guide. We used a 10 GB file for the test found that the average sequential read rate was ~60 MB/sec (megabytes/sec) and the average random read rate was ~30 MB/sec. Are these numbers on par for what the server should be performing? Better than on par? Horrible? Amazing?

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• What is a plain text password and why can it be decypted?

  - by Misha

  I was trying to understand the level of security offered by Windows picture passwords and ran across this claim on this website. Some of our password recovery utilities already implement Windows 8 plain-text password decryption. The upcoming release of Windows Password Recovery is expected to have a full-fledged Vault analyzer and offline decoder. I'm trying to understand what a plain text password is and if it is the default kind of password when I add a password to my account. My head is a bit muddled on this one so any clarification can help. It seems there are passwords that can be decrypted and those that can't. What can be decrypted? Is the password I enter in Windows exposed?

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• SSLCipherSuite - disable weak encryption, cbc cipher and md5 based algorithm

  - by John

  A developer recently ran a PCI Scan with TripWire against our LAMP server. They identified several issues and instructed the following to correct the issues: Problem: SSL Server Supports Weak Encryption for SSLv3, TLSv1, Solution: Add the following rule to httpd.conf SSLCipherSuite ALL:!aNULL:!eNULL:!LOW:!EXP:RC4+RSA:+HIGH:+MEDIUM Problem: SSL Server Supports CBC Ciphers for SSLv3, TLSv1 Solution: Disable any cipher suites using CBC ciphers Problem: SSL Server Supports Weak MAC Algorithm for SSLv3, TLSv1 Solution: Disable any cipher suites using MD5 based MAC algorithms I tried searching google for a comprehensive tutorial on how to construct an SSLCipherSuite directive to meet my requirements, but I didn't find anything I could understand. I see examples of SSLCipherSuite directives, but I need an explanation on what each component of the directive does. So even in the directive SSLCipherSuite ALL:!aNULL:!eNULL:!LOW:!EXP:RC4+RSA:+HIGH:+MEDIUM, I dont understand for example what the !LOW means. Can someone either a) tell me the SSLCipherSuite directive that will meet my needs or b) show me a resource that clearly explains each segment of a SSLCipherSuite is and how to construct one?

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• Windows XP boot: 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: 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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• Proxification rulte for System process

  - by kseen

  I'm trying to configure Microsoft Visual Studio 2010 remote debugging and ran into issue: while connecting to remote computer running MSVSMON, client computer sends SYN request for connection. It makes it under the System process (as I see it in TCPView). As every network apps should be configured to use proxy in our network, I'm trying to add devenv.exe to proxification rules to make its traffic goes thru LAN's proxy server. It doesn't help. So my question is how can I make that low-level-system traffic will go through local area network proxy server?

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• Install Windows 7 x64 from a separate partition on same hard drive (no DVD/USB)?

  - by Fraser

  I'm currently running Windows XP 32-bit, and want to install Windows 7 64-bit. However, my DVD drive is broken, and the only USB sticks I have lying around are USB 1.1 only (SLOW!). So I tried (as suggested would work for a USB stick by several online guides): Created new primary partition (formatted NTFS) Set that partition as active Copied contents of Win7 x64 ISO Downloaded the 32-bit bootsect.exe Ran bootsect /nt60 F: However, when I boot into the new partition, I only see a blinking cursor on a blank screen; nothing happens. Any ideas?

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• SSH keys fail for one user

  - by Eli

  I just set up a new Debian server. I disabled root SSH and password auth, so you've gotta use a key file. For my primary user, everything works exactly as expected. I used ssh-keygen -t dsa and got myself a public and private key. Put one in authorized keys, put the other in a pem file locally. I wanted to create a user that I can deploy things with, so I did basically the same process. I addusered it, made a .ssh folder, ran ssh-keygen -t dsa (I also tried RSA), put the keys in their appropriate locations. No luck. I'm getting a Permission denied (publickey) error. When I use the exact same keys as the account that works, same error. When I enable password authentication, I can log in via SSH with the password. How do I debug this?

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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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• Why is port 444 open on this router?

  - by TJ Thind

  I have a Cisco RV110W. I ran nmap at it from the outside and nmap reports that the router has tcp port 444 open. Yet there are no port forwarding rules specifying this port. It should as far as I can tell, be closed. There's even a service listening to that port which I can connect to through telnet. I threw some SNPP commands at it but the service doesn't respond to any of them so I don't believe it's SNPP. Does anyone have any idea why this particular router has tcp port 444 open? I haven't been able to find anything in the manual or on Cisco's website.

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• Opscode Chef nginx compile from source issue reports successful run but does nothing

  - by v_abhi_v

  I am trying to install nginx from source in Opscode Chef and its bit weird, it runs complaining nothing but does not install it either. This is how my role attributes look like looks like "nginx":{ "default_site_enabled":false, "version":"1.2.6", "init_style":"init", "install_method":"source", "configure_flags":[ "--without-http_access_module", "--without-http_auth_basic_module", "--without-http_autoindex_module", "--without-http_browser_module", "--without-http_charset_module", "--without-http_fastcgi_module", "--without-http_memcached_module", "--without-http_referer_module", "--without-http_scgi_module", "--without-http_split_clients_module" ], "log_dir":"/var/log/nginx", "binary":"/opt/nginx/sbin/nginx", "source":{ "prefix":"/opt/nginx/dist", "modules":["http_ssl_module", "http_gzip_static_module" ] } }, The chef log shows: [2012-12-19T02:37:44+00:00] INFO: Processing bash[compile_nginx_source] action run (nginx::source line 82) [2012-12-19T02:37:45+00:00] INFO: bash[compile_nginx_source] ran successfully I am clueless on what's going on :(

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• VMware Virtualisation - Convert 64bit Windows Server to 32bit VM?

  - by dannymcc

  I have just started playing around with Vmware sphere and have the hypervisor OS installed on a spare HP ProLiant DL360 G4. I have created a test virtual machine running Ubuntu which has worked well. As a test project I wanted to convert a powered on server running Windows Server 2008 64bit into a virtual machine. As soon as I ran the Vmware Go software to start the conversion it became apparent that I cannot run 64bit guest OS's on that particular server. So, is there a way of migrating 64bit to 32bit during the conversion?

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• Windows Recovery Console - forgot password

  - by Jason

  I upgraded to Windows XP SP3, which immediately "broke" the laptop - it never booted with SP3 on it. I put in the Windows XP install disk I had originally used to set up the laptop, and it ran for a while, then said there's no hard disk present, so it can't continue. BIOS still sees the hard disk. I put the hard disk in an external USB case, and I can read/write to it with the other laptop. I then put the hard disk back in it's laptop, restarted with the Windows CD, and tried to get into the Recovery Console, but I forgot the password and can't "log on" to the drive. I'd also like to know if I can fix the broken files (which ones?) from the other laptop (via USB), and if I can "log on" to an external disk with the Recovery Console. (Also, the data won't fit on my other laptop, and I don't have all the install CDs for software on the disk.) Any help appreciated.

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• SQL Server Analysis Services 2005 crash when disk is full?

  - by squillman

  One of our SQL boxes ran itself out of disk space last night. This particular server has both the database engine and analysis services on it. Database engine was not happy about having no disk space on the volume where all the data files are, but analysis services just plain died. At least, the only thing I have to blame is the full volume. Has anyone experienced a SSAS that they've been able to directly tie to no disk space? I've got nothing else in the SQL or event logs to blame...

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• Lingering tcp connection in LISTEN state

  - by Silvio Donnini

  My java application can sometimes be killed by an external script. This can be done either with SIGTERM or with SIGKILL. The application is a server which receives many connections per second, and it can be killed while trying to serve them. I would like to restart the application whenever it's killed, so I have prepared a script for that purpose. The problem is that, once the app has been killed, the new application instance can't bind to the port used by the previous instance, because the "Address is already in use". The previous instance's process has been definitely terminated, anyway the offending listening port is still there, but it is assigned to bash (or sh on other machines). Obviouly, my goal is to restart the application and let it bind successfully to the previous address. I've tried waiting more than 200 seconds before restarting to no avail, anyway I can't afford to wait that much. I've encountered this problem on all the machines I've ran the application (which is a jetty server with java 1.6). Any suggestion is appreciated, thanks, Silvio

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• Out of disk space on 4GB partiton yet it's only using 2GB

  - by Camsoft

  I'm running Ubuntu and have had a problem where the root partition has run out of disk space. When I perform df -h I get the following: Filesystem Size Used Avail Use% Mounted on /dev/sda6 4.6G 4.5G 0 100% / Yet there are only 2GB of files actually using up this partition. I then ran the following df -i and I get the following: Filesystem Inodes IUsed IFree IUse% Mounted on /dev/sda6 305824 118885 186939 39% / I have no idea what the -i flag does but it clearly shows that only 39% is used. Can anyone explain where my disk space has gone?

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• Solaris Administration Web GUI?

  - by Robert C

  I recently installed Solaris 11 x86 text install (http://www.oracle.com/technetwork/server-storage/solaris11/downloads/index.html?ssSourceSiteId=ocomen) to be used as a file server running ZFS. I noticed that I'm given the bare minimum in terms of packages. Is there an official oracle web GUI for managing ZFS? I ran a netstat and it doesn't appear to have installed any webserver thats listening. I saw something from a couple years ago, but apparently it's not packaged or maintained anymore (https://blogs.oracle.com/talley/entry/manage_zfs_from_your_browser). I tried pkg install network-console, but it says that the package isn't available for my platform. Any ideas? I'd like to stick with Oracle Solaris instead of the open source alternatives, if possible.

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• Cannot see main user profile directory on old vista hdd on win7

  - by chaoskreator

  I have an old laptop HDD that ran Vista that I need to get some pictures and movies off of. I've attached it via SATA cable to my new Win 7 (64 bit) machine and it mounts fine, except I can't see the main user profile in the D:\Users directory. I've changed ownership and permissions for the D: drive to my C:\ Username but still no luck. I read something about it being caused by the UAC being active on the Vista machine. Is this true? Is there a way to disable this and gain access to the main profile without putting it back into the old laptop (it's fried and won't boot)?

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• New CAT5 cable run is unstable - bad jacks? Bad cable?

  - by BeemerGuy

  This is a little project I'm doing at home. I wanted to wire two rooms together (basically, the router is one room, and the switch is in the second room). So I ran a CAT5 between the two rooms, and wired an RJ45 jack in each room. I then hooked up the two jacks with two CAT5 cable to run it through the cable tester, and all 8 wires seem good. Now, when I connect the switch and the router, the connection is unstable -- I ping the router and it barely holds on for two pings before it disconnects, and stays in that unstable state. Just to make sure the router and the switch are ok, I connected them with long wire between the two rooms and the connection is absolutely stable, and pings continuously. What could be the cause for the unstable connection? Especially that it pings a few times, so there IS a connection. But why is it unstable? And how come the cable tester says it's ok, but it's unstable?

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• Video for HTML5 -- ffmpeg commands

  - by StackOverflowNewbie

  I'd like to allow my users to upload their videos (no clue what format they'll be) and convert them into the following formats: MP4 Ogg Webm I think it's those 3 formats I need in order to support HTML5, at least per http://mediaelementjs.com/. I've tried various commands that I found on the web. Some of them worked, some of them used old syntax, some of them worked only on my computer and not others, some of them gave conflicting information, etc. Are there any FFMPEG experts here that can provide the "proper" commands? I'm not particularly trying to achieve anything special. I just want to be able to convert the video into something playable on the web. Highest quality, smallest filesize, etc. are the basic goals. Something that works without a lot of special configurations would be ideal, too. I ran into a lot of "missing presets" problems.

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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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