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DNS server at router level vs. computer level

- by Craig

I've three questions. Is it better/faster/optimal to set up your server's preferred and alternate DNS servers in your OS's network settings or in your router settings? Will it cause problems if it is set up in both places, both pointing to the same IPs? I am running Windows and I have my network assign a static IP to one of my computers. This doesn't allow me to obtain the DNS server addresses from my router automatically. Is there an IP I can put in that will cause it to take the DNS server addresses from the router?

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COM Local Server

- by Gamer

Hi, Similar to LocalServer32, which is used to specify the path to a 32Bit Local COM server, is there any registry entry for specifying the path to a 64Bit Local COM Server? If there is none, can we use LocalServer32 for 64Bit servers also? Note: In my knowledge there are only 2 registry entries - LocalServer and LocalServer32. According to MSDN the former is used for registering 16bit server and the latter to register a 32bit server. Thanks and Regards, Gamer

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How use DNS server to create simple HA (High availability) of my website?

- by marc22

Welcome, How can i use DNS server to create simple HA (High availability) of website ? For example if my web-server ( for better understanding i use internal IP in real it will be other hosting companies) 192.168.0.120 :80 (is offline) traffic go to 192.168.0.130 :80 You have right, i use bad word "hight avability" of course i was thinking about failover. Using few IP in A records is good for simple load-balancing. But not in case, if i want notice user about failure (for example display page, Oops something is wrong without our server, we working on it) against "can't establish connection". I was thinking about setting up something like this 2 DNS servers, one installed on www server Both have low TTL on my domain, set up 2 ns records first for DNS with my apache server second to other dns If user try connect he will get ip of www server using first dns, if that dns is offline (probably www server is also down) so it will try second NS record, what will point to another dns, that dns will point to "backup" page. That's what i would like to do. If You have other idea please share. Reverse proxy is not option, because IP of server can change, or i can use other country for backup.

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ASP.Net Checkbox value at postback is wrong?

- by Duracell

We have a checkbox that is initially disabled and checked. It is then enabled on the client side through javascript. If the user then unchecks the box and presses the button to invoke a postback, the state of the checkbox remains as checked on the server side. This is obviously undesirable behaviour. Here is an example. <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="testcb.aspx.cs" Inherits="ESC.testcb" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title></title> </head> <body> <form id="form1" runat="server"> <script type="text/javascript"> function buttonClick() { var cb = document.getElementById('<%= CheckBox1.ClientID %>'); cb.disabled = false; cb.parentNode.disabled = false; } </script> <div> <asp:CheckBox ID="CheckBox1" runat="server" Checked="true" Enabled="false" /> <asp:Button ID="Button1" runat="server" Text="Button" OnClientClick="buttonClick(); return false;" /> <asp:Button ID="Button2" runat="server" Text="Button2" OnClick="button2Click" /> </div> </form> </body> </html> And the Server-side code: using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; namespace ESC { public partial class testcb : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { } protected void button2Click(object sender, EventArgs e) { string h = ""; } } } So we break at the "string h" line and check the value of CheckBox1.Checked. It is true, even if it is unchecked on the form.

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Timeout expired in sql server problem

- by Avinash

set con2=server.CreateObject("ADODB.Connection") con2.ConnectionTimeout =1200 con2.open "Driver={SQL Server};server=111.111.111.11;user id=xx;pwd=xxx;Database=xxx" con2.execute("DELETE FROM tablename WHERE fieldid NOT IN(SELECT fieldid FROM tablename2)") con2.close set con2=nothing when i running this query using asp the following error occured. How to solve this issue? Microsoft OLE DB Provider for ODBC Drivers error '80040e31' [Microsoft][ODBC SQL Server Driver]Timeout expired

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HyperV - low CPU usage

- by Klark

I am very new to HyperV and virtual machine philosophy in general, so please expect more or less nooby questions :) I have a server that is only used as a host for virtual machines. OS is windows server 2008 R2 and it is running on 16 CPU and 48 GBs of RAM. On aforementioned server there are 8 VMs, each having 4 CPUs and 4 GBs of RAM. On those VMs we are running some CPU intensive tasks. Each machine has nearly 100% cpu usage. After I noticed slow performance I went to the host machine and started playing with process explorer. It turned out that cpu usage is very low. Also I/O is very low, and of course, memory consumption is high, which is expected. Of course, I don't expect that those 4 virtual cores dedicated to a VM work as fast as real, hardware 4 cores, but still I expected a higher consumption of real hardware. Is this sort of behaviour normal? I see that the most of CPU usage on host machine are marked as interrupts (which I guess is normal) and all those interrupts are passed to only one core (which is strange). Are there out of box optimization that I could perform to finally use all that processing power that is under the hood. My knowledge of virtualization technology is near to embarrassing, so I would be grateful for any links that could enlightened me :) Thanks.

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CodeIgniter not working on PHP 4 server without .htaccess availability

- by Rasiel

Hi All, Basically i developed my app on a localhost wamp server with PHP 5. ON uploading to the actual host i notice that The server is running php 4.4.9 Everytime i upload my .htaccess file, the server removes it completely.. seems to not be allowed When i test out the set all i get is a 404 page not found Any help on how to make it work on this PHP 4 server?

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BackupPC - why does it use rsync --sender --server ... ?

- by Jakobud

I'm in the process of experimenting with BackupPC on a CentOS 5.5 server. I have everything pretty much setup with default values. I tried setting up a basic backup for a host's /www directory. The backup fails with the following errors: full backup started for directory /www Running: /usr/bin/ssh -q -x -l root target /usr/bin/rsync --server --sender --numeric-ids --perms --owner --group -D --links --hard-links --times --block-size=2048 --recursive --ignore-times . /www/ Xfer PIDs are now 30395 Read EOF: Connection reset by peer Tried again: got 0 bytes Done: 0 files, 0 bytes Got fatal error during xfer (Unable to read 4 bytes) Backup aborted (Unable to read 4 bytes) Not saving this as a partial backup since it has fewer files than the prior one (got 0 and 0 files versus 0) First of all, yes I have my ssh keys setup to allow me to ssh to the target server without requiring a password. In the process of troubleshooting, I tried the above ssh command directly from the command line, and it hangs. Looking at the end of the debug messages for SSH I get: debug1: Sending subsystem: /usr/bin/rsync --server --sender --numeric-ids --perms --owner --group -D --links --hard-links --times --block-size=2048 --recursive --ignore-times . /www/ Request for subsystem '/usr/bin/rsync --server --sender --numeric-ids --perms --owner --group -D --links --hard-links --times --block-size=2048 --recursive --ignore-times . /www/' failed on channel 0 Next I started looking at the rsync flags. I did not recognize --server and --sender. Looking at the rsync man pages, sure enough, I don't see anything about --server or --sender in there. What are those in there for? Looking at the BackupPC config I have this: RsyncClientPath = /usr/bin/rsync RsyncClientCmd = $sshPath -q -x -l root $host $rsyncPath $argList+ And for the arguments, I have the following listed: --numeric-ids --perms --owner --group -D --links --hard-links --times --block-size=2048 --recursive Notice there is no --server, --sender or --ignore-times. Why are these things getting added in? Is this part of the problem?

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How to confirm php enabled on ubuntu server

- by Shishant

Hello, I am not much into linux. I am trying to setup a server through ssh. I installed apache php and mysql through this command. sudo aptitude install apache2 php5-mysql libapache2-mod-php5 mysql-server but I think php is not enabled on the server. when I run command I receive response as below $ which apache2ctl /usr/sbin/apache2ctl but when i check $ which php i receive no response. $ locate php5 /etc/apparmor.d/abstractions/php5 /usr/share/ubuntu-serverguide/html/C/php5.html available apache2 modules aptitude package manager

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postfix mail server and spam

- by darko petreski

Hi, I have a postfix mail server for our firm. The mails sent from this server to gmail and yahoo goes in spam. The postfix is configured on our server and it has never been used for spamming. Everything is configured as is should. The server works fine, the headers are as they should be. What should I do in order the messages not to go in spam ? Regards

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Can't communicate with Primary DNS Server

- by horsley

A computer, with Windows 7, can't access any website by domain suddenly. Whether this computer use a wired link or connect to the WLAN, The fault persists IP and DNS obtained automatically, and seems normal (ipconfig /all return the correct info) I can visit websites by using HTTP proxy The DNS server is available, other computer in my room works properly. I can ping myself, the gateway and any other IP, but domains I can use nslookup and obtain the correct IP info There are some error information in the event log about dns client events explaining the client can not verify the DNS server available Windows network diagnosis explain that Windows can't communicate with the device or resource (Primary DNS Server) I guess the dns client should be blame. I tried to do the following things but the fault persist. Reinstall the driver of network adapter Reset TCP/IP (netsh int ip reset) Reset Winsock (netsh winsock reset) Reset LSP I don't want to reinstall the whole os, what should I do?

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Running IIS command on remote server via Powershell

- by Paul Hunt

I am trying to check if an IIS application pool exists on a remote server using a PowerShell script. The command I am running is: test-path "IIS:\AppPools\DefaultAppPool" If I run this script directly on the IIS server in question I get a response back of "True" so this tells me that I have IIS management correctly configure in PowerShell. However when I run the following script from a remote server I get a response of "False" invoke-command -ComputerName IISSERVER -ScriptBlock { test-path "IIS:\AppPools\DefaultAppPool" } I know that PowerShell remoting is correctly configured because I can run the following command and get a list of files invoke-command -ComputerName IISSERVER -ScriptBlock { get-childitems "c:\" } So why am I getting the wrong response about the existence of the application pool?

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storing HTML5 webdatabase table data to sql server periodically

- by DotnetSparrow

I want to read data from html5 web database and post to sql server using vb.net server side. I have used following link as reference: http://www.html5rocks.com/en/tutorials/webdatabase/todo/ I have created a web database and created table and stored some data in it. Now I want to store this data to sql server. How to get the data from html 5 web database and post to sql server each hour ( using some js timer). Please suggest solution

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MVC app not working on server but is fine on development machine

- by GB

Hello, I am able to run my application just fine on my dev machine but as soon as I publish it to the web server some functionality is lost. Any type of .ajax POST does not work usually with a 401 unauthorized error. The server is Windows 2008 with IIS7. I also installed Visual Studio 2008 with MVC2 on the server and ran the application directly on the server and the same .ajax POST does not work but the error changed to 500 unknown. Thanks for the help.

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Override mime type with VS Web Dev Server

- by Douglas

I would like to serve xbaps from the VS web dev server (cassini) to Firefox, but when served from the dev server, Firefox offers to download this file. As far as I can tell, this is because the dev server is serving the xbap file with a mime type of "application/octet-stream" instead of "application/x-ms-xbap", which works when served from IIS. Does anyone know how to change the mime type which the dev server uses for *.xbap files?

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can I force server to always use turboboost?

- by javapowered

I'm using HP DL360p Gen8 with 2 * Xeon E5-2640. I do not load CPU 100%, i load it only ~10% and so I guess turboboost is not activated. However I'm using my server for trading so I absolutely don't care about CPU loading but I always want to process my data asap. So I want server to operate using maximum 3 GHz. I.e. 90% of CPU time I don't have anything to process. 10% of CPU time I have data to process. But I need to process it ASAP. I need every single microsecond. So I want server to operate always at maximum "turboboosted" mode. Is it possible?

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sendmail and MX records when mail server is not on web host

- by Jim Nelson

This is a problem I'm sure is easy to fix, but I've been banging my head on it all day. I'm developing a new web site for a client. The web site resides at (this is an example) website.com. I have a PHP form script to email visitors' requests to [email protected]. When I coded this on a staging server on a different domain, all worked fine. When I moved it to website.com, the mail messages never arrived. The web server is on a virtual host with a major ISP. Here's what I've learned since then: My client's mail server is Microsoft Exchange on a box physically in their office. Whenever someone on the outside world emails [email protected], the mail arrives. But if the web server sends to the same email address, it fails every time. This is not a PHP problem. I secure shell in to the web server and have tested this both with sendmail and the UNIX mail application. I've also tested it by emailing various email accounts from the shell. I can email myself, for example, just nobody at the website.com domain. In short, when I'm logged in to website.com, mail to [email protected], [email protected], [email protected] all fail. All other addresses work fine. What I've discovered is those dropped emails are routed to the web server's "catchall" account where they sit in its inbox. I've done an MX lookup on website.com. The MX record points to mailsec.website.com. I can telnet to mailsec.website.com port 25 and see the SMTP server. It appears to me that website.com isn't doing an MX lookup when it's sending mail to [email protected]. My theory is that it recognizes the domain as local, sees that there's no "requests" user account to deliver it to, and drops the mail into the catchall account. What I want is to force sendmail to do the MX lookup and send the message on to the Exchange server. I'm at wit's end here. I can't figure out how to do this. For that matter, I may be way off base here and have misdiagnosed this entirely. Internet mail and MX has always seemed a black art to me, and my ignorance is certainly showing in this question.

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How do I install mod_dav_svn module on an Apache / MAMP server?

- by fettereddingoskidney

How do I install additional modules into my server configuration? Currently all of the other modules are installed in /Applications/MAMP/Library/modules...and I see that they are mod_*.so source files, but I cannot seem to get mine to end up here... :? I am trying to set up an SVN repository and use my Apache (MAMP) server to serve the repository. I am using the subversion installation that came (pre-installed?) on Mac OS X 10.5. The repository is working, but I cannot access it remotely through my MAMP server using a client program (Dreamweaver CS5). When I try, I get an error from Dreamweaver, saying: Cannot connect to host xxx: Connection refused. This, I believe, is because I have not properly configured my Apache server to serve the svn repository. So, I added the following lines to my httpd.conf file: <Location /subversion> DAV svn SVNPath /Applications/MAMP/htdocs/svn/ AuthType Basic AuthName "Subversion repository" AuthUserFile /applications/mamp/htdocs/.htpasswd Require ServerAdmin </Location> Restarted the server with the command $ /Applications/MAMP/Library/bin/apachectl -k restart I used this path because otherwise the default apachectl path is set to /usr/sbin/apachectl, which is the location of the pre-installed command on Mac OS X, since the OS comes packaged with a built-in Apache server. And I get the error: Syntax error on line 1153 of /Applications/MAMP/conf/apache/httpd.conf: Unknown DAV provider: svn I checked the upper portion of httpd.conf and see that dav_module (mod_dav.so) is loaded and is in fact in my the modules directory of my server. However, mod_dav_svn is not installed in that directory nor is it in the LoadModule portion of httpd.conf. So I need to install it, right? I have tried installing modules into my MAMP server before but was never successful...because I don't know how to do it. Can someone please walk me through how to install that module? Thanks for your time!

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Decrypting data from a secure socket

- by Ronald

I'm working on a server application in Java. I've successfully got past the handshake portion of the communication process, but how do I go about decrypting my input stream? Here is how I set up my server: import java.io.IOException; import java.net.ServerSocket; import java.net.Socket; import java.util.ArrayList; import java.util.HashMap; import javax.net.ServerSocketFactory; import javax.net.ssl.SSLServerSocket; import javax.net.ssl.SSLServerSocketFactory; import org.json.me.JSONException; import dictionary.Dictionary; public class Server { private static int port = 1234; public static void main(String[] args) throws JSONException { System.setProperty("javax.net.ssl.keyStore", "src/my.keystore"); System.setProperty("javax.net.ssl.keyStorePassword", "test123"); System.out.println("Starting server on port: " + port); HashMap<String, Game> games = new HashMap<String, Game>(); final String[] enabledCipherSuites = { "SSL_RSA_WITH_RC4_128_SHA" }; try{ SSLServerSocketFactory socketFactory = (SSLServerSocketFactory) SSLServerSocketFactory.getDefault(); SSLServerSocket listener = (SSLServerSocket) socketFactory.createServerSocket(port); listener.setEnabledCipherSuites(enabledCipherSuites); Socket server; Dictionary dict = new Dictionary(); Game game = new Game(dict); //for testing, creates 1 global game. while(true){ server = listener.accept(); ClientConnection conn = new ClientConnection(server, game, "User"); Thread t = new Thread(conn); t.start(); } } catch(IOException e){ System.out.println("Failed setting up on port: " + port); e.printStackTrace(); } } } I used a BufferedReader to get the data send from the client: BufferedReader d = new BufferedReader(new InputStreamReader(socket.getInputStream())); After the handshake is complete it appears like I'm getting encrypted data. I did some research online and it seems like I might need to use a Cipher, but I'm not sure. Any ideas?

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Multiple email accounts from the same server in Emacs Gnus

- by docgnome

I'm trying to set up Gnus to use both my gmail accounts but I can only ever get one at a time to show up in the list of folders. (setq gnus-select-method '(nnimap "[email protected]" (nnimap-address "secure.emailsrvr.com") (nnimap-server-port 993) (nnimap-stream ssl))) (setq gnus-secondary-select-methods '((nnimap "[email protected]" (nnimap-address "imap.gmail.com") (nnimap-server-port 993) (nnimap-stream ssl)) (nnimap "[email protected]" (nnimap-address "imap.gmail.com") (nnimap-server-port 993) (nnimap-stream ssl)))) That is the relevant portions of my .gnus file. It prompts me for three username passwords on startup. After I enter all three, I can access my work account and the gmail account that I enter the creds for second. This is really annoying! Any ideas?

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Download folders from dev server to local drive

- by Niall Collins

I am developing a .net web application on a local environment. I have a dev server that the application is installed on. Within the web application on the dev server I have four folders that I dont have locally and that are controlled by another application. In my day to day development I require the four folders on local PC. I would like to automate the process of pulling the folders from the dev server to my local drive, so I can keep thing in sync. Ideally something like this Run file from main folder (be it a bat file, powershell, some sort of job, open to recommendations) Download 4 folders supplied to it. First download bring everything down, from them on only pull the changes Not sure where to start with achieving this but would appreciate any help would with. I know there are apps out there that do something like this but would like to give a go writing something to do this before I resort to using one of them.

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What is proper relationship between /etc/hosts and DNS A records for a Linux server?

- by MountainX

I have an Ubuntu server. It is going to be a web server with a URI of www.example.com. I have a DNS A record pointing www.example.com to the server's IP address. Let's say I pick "trinity" as the hostname for this server. I want to set up the DNS records correctly. I need reverse DNS to www.example.com, so a CNAME for www.example.com doesn't seem appropriate. Here's my question: Is it considered best practice to set up two DNS records (which in my case would likely be two A records), one for www.example.com and one for trinity.example.com, both pointing to this server's IP address? (Or, even if it is not accepted as a best practice, is it a good idea?) If so, would the following be a proper /etc/hosts file? $ cat /etc/hosts 127.0.1.1 trinity.local trinity 99.100.101.102 trinity.example.com trinity www.example.com This server is a Linode and Linode's docs seem to imply that the above approach is best (if I am reading them correctly). Here's the relevant section. I bolded the line that seems to apply here. Update /etc/hosts Next, edit your /etc/hosts file to resemble the following example, replacing "plato" with your chosen hostname, "example.com" with your system's domain name, and "12.34.56.78" with your system's IP address. As with the hostname, the domain name part of your FQDN does not necesarily need to have any relationship to websites or other services hosted on the server (although it may if you wish). As an example, you might host "www.something.com" on your server, but the system's FQDN might be "mars.somethingelse.com." File:/etc/hosts 127.0.0.1 localhost.localdomain localhost 12.34.56.78 plato.example.com plato The value you assign as your system's FQDN should have an "A" record in DNS pointing to your Linode's IP address. For more information on configuring DNS, please see our guide on configuring DNS with the Linode Manager.

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Is it possible to open a sqlite database from within microsoft sql management studio?

- by Brian T Hannan

Is there a way to open a .db file (sqlite database file) from within microsoft sql management studio? Right now we have a process that will grab the data from a microsoft sql server database and put it into a sqlite database file that will be used by an application later on. Is there a way to open the sqlite database file so that it can be compared to the data inside the sql server database ... using only one sql query? Is there a plug-in for microsoft sql management studio? Or maybe there is another way to do this same task using only one query. Right now we have to write two scripts ... one for sql server database and one for sqlite database ... then take the output from each in the same format and put them each in their own OpenOffice spreadsheet file. Finally, we compare the two files to see if there are any differences. Perhaps there's a better way to do this. P.S. Alot of applications use sqlite internally: Well-Known Users Of SQLite

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Flash player debugger plugin crashes on Mac OS [tried many version of the plugin and browsers, all o

- by Ali

Dear All, I recently started using Mac OS X for a flex/actionscript project and having a problem with flash player debugger plugin for the browsers: OSX: 10.6.3 Browsers I tried: firefox, safari and chrome Flashplayer debug "Flash Player 10 Plugin content debugger (Intel-based Macs) Whenever I open a page containing a flash content, my browser crashes due to flash player plugin's crash. I checked the version of my flash player debug plugin with http://kb2.adobe.com/cps/155/tn_15507.html and as the version checker is written in flash, my browser crashes a few seconds later. I am using version 10,0,42,2 (debug edition: yes) This is what I see in the crash log: Exception Type: EXC_BAD_ACCESS (SIGBUS) Exception Codes: KERN_PROTECTION_FAILURE at 0x000000001887e3e4 Any ideas how can I track this issue ? Cheers, -A

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State server in webfarm scenario?

- by Curtis White

This is a fairly basic question about state server but assume there are 2 servers behind a load balancer. How do I configure the session state server? So, I have machine1 and machine2. I would assume that I would need to install the state server on 1 machine only and then use the internal IP to refer to that machine. Is this correct? As oppose too, I would not install state server on both machines.

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