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• Upgraded from VS 2008 -> VS 2010. Can't Connect to SQL Server in Staging Environment

  - by Bob Kaufman

  I have a test application written in C#/ASP.NET that I've developed using Visual Studio 2008 Professional/.NET 3.5 which connects to a local SQL Server 2008 Express instance. I upgraded the development machine to Visual Studio 2010 Professional maintaining .NET 3.5 and everything in the development environment continues to work correctly. Upon deployment of the new app to an internal staging machine, that app cannot connect to its local SQL Server 2008 Express database. I get the customary "server not found" error: A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible... Does something need to be upgraded on the staging machine to be able to host a Visual Studio 2010/.NET 3.5 application?

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• Sending single emails works, but sending to the same email in a distribution list is bounced

  - by EvilChookie

  I'm running an Exchange 2003 server on a Telstra Business internet connection (in Australia). I'm routing emails through the SMTP connecter, using the host smtp.telstrabusiness.com When users send single emails to a single recipient, the emails are sent correctly. However, when users send emails to a distribution list, they bounce back with: The message could not be delivered because the recipient's destination email system is unknown or invalid. Please check the address and try again, or contact your system administrator to verify connectivity to the email system of the recipient. One of the people in the list was able to recieve a single email from us just a few minutes afterwards, but did not recieve any of the email that should have come from the distribution list. Is there a way I can throttle the number of messages that Exchange will send at a time, so as not to appear as spam to Telstra?

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• How to dynamically edit dns entries without restarting the dns server

  - by satish

  I am trying to host multiple sites on a single webapp in a tomcat server. For example www.abc.com, www.xyz.com and several sites fetch content from my webapp hosted on tomcat with apache as the web server. My web app is hosted at www.mysite.com. www.abc.com should forward to www.mysite.com?id=abc www.xyz.com should forward to www.mysite.com?id=xyz Can you tell me how to configure dns entries, apache and tomcat configuration to achieve this scenario?? These site will have to be added dynamically! so is there any way to update the dns entries dynamically without restarting the dns server ... and similarly for apache and tomcat also?? Thanks very much in advance

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• Can not connect to tomcat server externally,

  - by KItis

  My Tomcat server is running on virtual server, this server is running on fedora machine. I have setted up everything on this machine to run tomcat, tomcat working well on local host. but i can not access the wsdl of the webservice running on this tomcat server remotely using IP address of this server, as follows. http://xxx.xxx.xxx.xxx:8080/axis2/services/listServices one of my friend said that i need to configure DNS to access remotely using IP address, i didn't understand what he said also. iptables on this server is also stooped. Also , i can access mysql running on this server remotly, my problem is why doesn't it work for tomcat. could someone can help me to find a solution for this problem. Thanks in advance for any help

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• Warning: DocumentRoot * does not exist on Centos 6

  - by user1213807

  My virtual hosts lines: <VirtualHost *:80> ServerAdmin [email protected] DocumentRoot /www/docs/example.com ServerName example.com ErrorLog logs/example.com-error_log CustomLog logs/example.com.com-access_log common </VirtualHost> And when I apache restart (sudo apachectl -k stop) get this error: Warning: DocumentRoot [/www/docs/example.com] does not exist I've checked some ways: All files and directories permissions is OK, everything 755. I think, maybe this error about SeLinux and disable it. But not working. Still same error. How can I fix this problem?

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• Two network interfaces and two IP addresses on the same subnet in Linux

  - by Scott Duckworth

  I recently ran into a situation where I needed two IP addresses on the same subnet assigned to one Linux host so that we could run two SSL/TLS sites. My first approach was to use IP aliasing, e.g. using eth0:0, eth0:1, etc, but our network admins have some fairly strict settings in place for security that squashed this idea: They use DHCP snooping and normally don't allow static IP addresses. Static addressing is accomplished by using static DHCP entries, so the same MAC address always gets the same IP assignment. This feature can be disabled per switchport if you ask and you have a reason for it (thankfully I have a good relationship with the network guys and this isn't hard to do). With the DHCP snooping disabled on the switchport, they had to put in a rule on the switch that said MAC address X is allowed to have IP address Y. Unfortunately this had the side effect of also saying that MAC address X is ONLY allowed to have IP address Y. IP aliasing required that MAC address X was assigned two IP addresses, so this didn't work. There may have been a way around these issues on the switch configuration, but in an attempt to preserve good relations with the network admins I tried to find another way. Having two network interfaces seemed like the next logical step. Thankfully this Linux system is a virtual machine, so I was able to easily add a second network interface (without rebooting, I might add - pretty cool). A few keystrokes later I had two network interfaces up and running and both pulled IP addresses from DHCP. But then the problem came in: the network admins could see (on the switch) the ARP entry for both interfaces, but only the first network interface that I brought up would respond to pings or any sort of TCP or UDP traffic. After lots of digging and poking, here's what I came up with. It seems to work, but it also seems to be a lot of work for something that seems like it should be simple. Any alternate ideas out there? Step 1: Enable ARP filtering on all interfaces: # sysctl -w net.ipv4.conf.all.arp_filter=1 # echo "net.ipv4.conf.all.arp_filter = 1" >> /etc/sysctl.conf From the file networking/ip-sysctl.txt in the Linux kernel docs: arp_filter - BOOLEAN 1 - Allows you to have multiple network interfaces on the same subnet, and have the ARPs for each interface be answered based on whether or not the kernel would route a packet from the ARP'd IP out that interface (therefore you must use source based routing for this to work). In other words it allows control of which cards (usually 1) will respond to an arp request. 0 - (default) The kernel can respond to arp requests with addresses from other interfaces. This may seem wrong but it usually makes sense, because it increases the chance of successful communication. IP addresses are owned by the complete host on Linux, not by particular interfaces. Only for more complex setups like load- balancing, does this behaviour cause problems. arp_filter for the interface will be enabled if at least one of conf/{all,interface}/arp_filter is set to TRUE, it will be disabled otherwise Step 2: Implement source-based routing I basically just followed directions from http://lartc.org/howto/lartc.rpdb.multiple-links.html, although that page was written with a different goal in mind (dealing with two ISPs). Assume that the subnet is 10.0.0.0/24, the gateway is 10.0.0.1, the IP address for eth0 is 10.0.0.100, and the IP address for eth1 is 10.0.0.101. Define two new routing tables named eth0 and eth1 in /etc/iproute2/rt_tables: ... top of file omitted ... 1 eth0 2 eth1 Define the routes for these two tables: # ip route add default via 10.0.0.1 table eth0 # ip route add default via 10.0.0.1 table eth1 # ip route add 10.0.0.0/24 dev eth0 src 10.0.0.100 table eth0 # ip route add 10.0.0.0/24 dev eth1 src 10.0.0.101 table eth1 Define the rules for when to use the new routing tables: # ip rule add from 10.0.0.100 table eth0 # ip rule add from 10.0.0.101 table eth1 The main routing table was already taken care of by DHCP (and it's not even clear that its strictly necessary in this case), but it basically equates to this: # ip route add default via 10.0.0.1 dev eth0 # ip route add 130.127.48.0/23 dev eth0 src 10.0.0.100 # ip route add 130.127.48.0/23 dev eth1 src 10.0.0.101 And voila! Everything seems to work just fine. Sending pings to both IP addresses works fine. Sending pings from this system to other systems and forcing the ping to use a specific interface works fine (ping -I eth0 10.0.0.1, ping -I eth1 10.0.0.1). And most importantly, all TCP and UDP traffic to/from either IP address works as expected. So again, my question is: is there a better way to do this? This seems like a lot of work for a seemingly simple problem.

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• HTTP Range request rejected

  - by Dan

  I am trying to understand why my production environment might be disallowing HTTP RANGE requests. I have a pool of W2K8x64/IIS7 servers behind a pair of Netscaler 9000s. I compose the following request in Fiddler: http://myorigin.example.com/file.flv User-Agent: Fiddler Host: myorigin.example.com Range: bytes=40000-60000 The response looks like: HTTP/1.1 200 OK Cache-Control: public Content-Type: video/x-flv Expires: Thu, 24 Jun 2010 18:23:53 GMT Last-Modified: Sat, 11 Apr 2009 00:16:14 GMT Accept-Ranges: none ETag: f9d5c718-e148-4225-9ca6-d1f91a2a3c08-_633749805744270000 Server: Microsoft-IIS/7.0 Edge-Control: max-age=2592000 X-Powered-By: ASP.NET Date: Tue, 25 May 2010 18:23:53 GMT Content-Length: 443668 "Accept-Ranges: none" tells me that the range request was rejected, but I am not sure where/why as IIS7 accepts Range by default. Could the 'scalers be shooting it down? Thanks, Dan

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• fail2ban with Cloudflare

  - by tatersalad58

  I'm using fail2ban to block web vulnerability scanners. It is working correctly when visiting the site if CloudFlare is bypassed, but a user can still access it if going through it. I have mod_cloudflare installed. Is it possible to block users with IPtables when using Cloudflare? Ubuntu Server 12.04 32-bit Access.log: 112.64.89.231 - - [29/Aug/2012:19:16:01 -0500] "GET /muieblackcat HTTP/1.1" 404 469 "-" "-" Jail.conf [apache-probe] enabled = true port = http,https filter = apache-probe logpath = /var/log/apache2/access.log action = iptables-multiport[name=apache-probe, port="http,https", protocol=tcp] maxretry = 1 bantime = 30 # Test Apache-probe.conf [Definition] failregex = ^<HOST>.*"GET \/muieblackcat HTTP\/1\.1".* ignoreregex =

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• Rewrite URL before passing to proxy Lighttpd

  - by futureelite7

  Hi, I'm trying to setup a reverse proxy in lighttpd, such that all requests (and only those requests) under /mobile/video is redirected to the / directory of a secondary web server. This is pretty easy in apache, but I can't for the life of me figure out how to do so in lighttpd. $HTTP["url"] =~ "^/wsmobile/video/" { url.rewrite-once = ( ".*" => "/test/" ) proxy.server = ( "" => ( ( "host" => "210.200.144.26", "port" => 9091 ) ) ) } I've tried using the http["url"] directive, but lighttpd simply ignore those requests and continue to pass the full url to the secondary server, which of course chokes and throws 404s. However, if I do a global rewrite then everything gets forwarded to the secondary server, which is also not what I want. How do I go about this task?

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• Cyrus: authentication failure: checkpass failed

  - by Nick

  I'm trying to get Cyrus IMAP (v 2.2 on Ubuntu 9.04) setup and working, but I'm having a bit of trouble getting the login working correctly. I've created a mailbox for my test user "nrahl": cm user/nrahl and then created a password: $ saslpasswd2 nrahl I'm attempting to connect to the mailbox using Thunderbird. I'm using the machine's LAN IP address as the host, and "nrahl" as the username. It connects to the server and prompts me for the password. When I enter it, I get "Login to server failed." in Thunderbird, and /var/log/mail.log shows: Apr 15 19:20:01 IMAP cyrus/imap[1930]: accepted connection Apr 15 19:20:09 IMAP cyrus/imap[1930]: badlogin: [192.168.5.21] plaintext nrahl SASL(-13): authentication failure: checkpass failed Part of /etc/imapd.conf with comments removed: sieveusehomedir: false sievedir: /var/spool/sieve #mailnotifier: zephyr #sievenotifier: zephyr #dracinterval: 0 #drachost: localhost hashimapspool: true allowplaintext: yes sasl_mech_list: PLAIN #allowapop: no #sasl_maximum_layer: 256 #loginrealms: example.com #virtdomains: userid #defaultdomain: sasl_pwcheck_method: saslauthd #sasl_auxprop_plugin: sasldb sasl_auto_transition: no

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• Monitoring Maximum Process Network Activity

  - by user125973

  We have a collocated server on which we run some OpenVZ hosts. Recently, we have had to pay a lot extra we keep exceeding our bandwidth quota. Our quota is 5 Mb/s but we have spike to almost 50. I looked at the graphs and there are some spikes happening at some intervals. I want to know which process is causing this so I need a tool that monitors the processes and gives me the one with the maximum instant traffic (It doesn't matter how much traffic we have as long as we don't exceed the 5Mb/s quota). Does anyone have a recommendation for this? My hosts are CentOS 5 with OpenVZ so I can see all the containter processes from the host, if that helps in any way.

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• Azure VM with many IPs or SSL certificates

  - by timmah.faase

  I am looking to move our hosting environment to Azure and by doing so have created a sandpit VM to figure things out. We host around 300-400 websites in IIS and about 2% of these sites have unique, non wildcard certificates all requiring a unique public IP in our current setup. Can you get a range of IPs pointing to 1 VM/Endpoint? Or is it possible to create an SSL proxy? I've never created an SSL proxy but like the idea of it. I'd need advise here on how to proceed if this is the best option. Sorry if this has been answered! Sorry also if my question isn't worded eloquently.

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• MySQL replication/connection failing over SSL

  - by Marcel Tjandraatmadja

  I set up two MySQL servers where one is replicating from the other. They both work perfectly, but once I turn on SSL I get the following error: ERROR 2026 (HY000): SSL connection error I get the same error running from command line like so: mysql --ssl=1 --ssl-ca=/etc/mysql/certificates/ca-cert.pem --ssl-cert=/etc/mysql/certificates/client-cert.pem --ssl-key=/etc/mysql/certificates/client-key.pem --user=slave --password=slavepassword --host=master.url.com Both MySQL servers are running on version 5.0.77. There is a difference that MySQL in the master server was compiled under x86_64 while in the slave server under i686. Also both machines are running CentOS 5. Plus I generated certificates as per this page. Any idea for finding a solution?

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• Ask a DNS server what sites it hosts - and how to possibly prevent misuse

  - by Exit

  I've got a server which I host my company website as well as some of my clients. I noticed a domain which I created, but never used, was being attacked by a poke and hope hacker. I imagine that the hacker collected the domain from either hitting my DNS server and requesting what domains are hosted. So, in the interest of prevention and better server management, how would I ask my own DNS server (Linux CentOS 4) what sites are being hosted on it? Also, is there a way to prevent these types of attacks by hiding this information? I would assume that DNS servers would need to keep some information public, but I'm not sure if there is something that most hosts do to help prevent these bandwidth wasting poke and hope attacks. Thanks in advance.

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• Getting rid of Plesk on a VPS

  - by TomA

  I've been using a relatively expensive VPS for hosting about 30 domains and I want to migrate to a cheaper one, without Plesk. Both use CentOS. My users will not care, they don't use Plesk anyway. But I will not be able to use it for creating new virtual hosts, FTP accounts etc. I'm not a commandline guru, esp. not in a server environment. Is there a free Plesk alternative for these purposes? I need to: Create a new virtual host with it's own FTP account Setup some basic FTP quota I don't need: DNS management (the new VPS service has an external DNS management GUI) Mail server management (I use Google Apps) Any suggestions welcome, from Plesk alternatives to "RTFM" or links to tutorials.

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• Keep context-configuration when redeploying via Cargo

  - by Björn Pollex

  I am using Tomcat 7 to host a web-application that requires a JNDI datasource to be set up. Because this resource is specific to this application, I would like to configure it inside the application-specific context-descriptor in $CATALINA_BASE/conf/[enginename]/[hostname]/. I am also using Cargo from Maven to deploy the web-application to Tomcat. The problem is that when I do a redeploy with Cargo, it first undeploys the application, before deploying it again. When undeploying it, Tomcat deletes the context-descriptor of the application, so it won't work after redeploying. I could of course package the context-descriptor with the application, but I would like to keep any such container-specifics out of the .war. Another alternative is to configure the datasource in the global context-descriptor, but that too seems wrong, because the datasource is supposed to be exclusive to my application. Is my approach fundamentally wrong? What is the best practice here? Is there any way to prevent Tomcat from deleting the descriptor when undeploying?

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• VMWare Workstation Performance

  - by tekiegreg

  Hi there, awhile ago I upgraded my laptop to Windows 7 x64 from Windows XP 32 bit edition. However not before virtualizing the physical installation and I continue to run it under VMWare Workstation today. The performance on the resulting VM is just absolutely atrocious! I've done a lot of uninstalling stuff that's not longer needed since the machine is virtual in an effort to reduce RAM, but in general the responsiveness seems sluggish. I also run the Virtual Machine on it's own separate HD that is seldom used by the host OS. I'm just hoping for some general tips in increasing VMWare performance anywhere, thoughts? EDIT: Both of the below answers were excellent starting points for me. However I did like the selected answer's strategies on disk management. I am running the Virtual Machine in a separate external hard disk, likely I'm going to have to reconfigure somehow. Thanks all!

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• "Server not found" for live version of site

  - by user1491819

  I can access my local dev site on my local pc, eg: http://mysite But I cannot access the live site, even though it works fine on other pc's: http://www.mysite.com The live site gives the error in Firefox: Server Not Found. Pinging www.mysite.com gives the error:"Ping request could not find host www.mysite.com" hosts file: 127.0.0.1 mysite I changed the hosts file to the following and rebooted: 127.0.0.1 mysitedev I'm running on XP, and have cleared the DNS cache using: ipconfig /flushdns I have verified the live site is up using: http://www.isup.me/ and the site loads fine using my phone. What could be preventing my local pc from accessing the live site?

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• How to map DNS with my new IP address? [closed]

  - by Carsen

  I have installed apache2 in my ubuntu server. In apache2.conf, i have specified this <VirtualHost *:80> ServerName something.in DocumentRoot somewhere/public <Directory somewhere/public> AllowOverride all Options -MultiViews </Directory> </VirtualHost> Also, i have my Domain - something.in registered with Go Daddy. There i have changed A(HOST) to point to XXX.XXX.XX.XXX which is my public address. But when i type something.in in browser, i am not getting my apps home page. I got my public IP address as "XXX.XXX.XX.XXX is Natted to XX.XX.X.XX". which IP address should i use in my DNS settings? How to make apache2 in my ubuntu server listen to request for something.in?

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• Help me set up ssl.conf for multiple domains (name-based vhosts in ssl.conf?)

  - by mmattax

  In my httpd.conf: If I have my virtual host configured as: NameVirtualHost *:80 <VirtualHost *:80 ServerName foo.com ServerAlias www.foo.com Include conf.d/foo.conf </VirtualHost <VirtualHost *:80 ServerName bar.com ServerAlias www.bar.com Include conf.d/bar.conf </VirtualHost Can I get by with a single domain SSL certificate or must I purchase a wildcard SSL certificate to handle the www subdomain? I am now trying to configure the ssl.conf file, can I use name-based vhosts in my ssl.conf file like this: NameVirtualHost *:443 <VirtualHost *:443 ServerName foo.com ServerAlias www.foo.com ... Include conf.d/foo.conf </VirtualHost <VirtualHost *:443 ServerName bar.com ServerAlias www.bar.com ... Include conf.d/bar.conf </VirtualHost or do I need IP based vhosts? If this is possible, what kind of cert would I need in order to do this?

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• Mount shared folder (vbox) as another user

  - by jlcd

  I'm trying to mount my vbox shared folder every time my ubuntu starts. So, I added an entry on /etc/init with this: description "mount vboxsf Desktop" start on startup task exec mount -t vboxsf Desktop /var/www/shared Seems to work, except by the fact that all the files are owned by "root", and I don't have permission to write on the folder (neither chmod nor chown seems to be working). So, how can I make all the files under this shared folder to be owned by www-data user/group? Thanks ps.: The main reason for me to have an automatic shared folder, is so I can create/edit files from the HOST on the GUEST www folder. If you have a better idea for that, instead of sharing the folder, fell free to say.

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• Configure custom SSL certificate for RDP on Windows Server 2012 in Remote Administration mode?

  - by Ryan Bolger

  So the release of Windows Server 2012 has removed a lot of the old Remote Desktop related configuration utilities. In particular, there is no more Remote Desktop Session Host Configuration utility that gave you access to the RDP-Tcp properties dialog that let you configure a custom certificate for the RDSH to use. In its place is a nice new consolidated GUI that is part of the overall "edit deployment properties" workflow in the new Server Manager. The catch is that you only get access to that workflow if you have the Remote Desktop Services role installed (as far as I can tell). This seems like a bit of an oversight on Microsoft's part. How can we configure a custom SSL certificate for RDP on Windows Server 2012 when it's running in the default Remote Administration mode without needlessly installing the Remote Desktop Services role?

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• Windows XP app not able to talk to web server

  - by weotch

  My company makes an app built with Adobe Air which talks to our webserver for user authentication. Some users are not able to login. Running Charles Proxy tells us that the "host cannot be found." Loading up the webserver in IE, initially we weren't able to visit the site, we had to add it to trusted sites. My guess is that some security setting is denying our app as well. Does anyone have any suggestions as far as where to make security looser for our app?

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• Virtualbox PXE Boot Failing with a Windows Server 2008 R2 Server

  - by Vbitz

  Some fast help on this would be good, I have been on this problem for 14 hours. In a Virtualbox test environment I have 2 virtual machines networked together using a internal network (no traffic runs though the host, it is all at a software level). One is a fresh client with 512mb of ram and a dual core set-up, the other is the server with 1.5GB of ram and running server 2008 r2. The server is configured as a dns server, dchp server, domain controller and also serves PXE booting though WDS (Windows Deployment Services). Both machines can see each other and I am able to start a network boot. The issue comes at the second to last stage of the pre windows PE install. On TFTP download of boot.sdi it starts it but stops during the boot process.

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• zsh right-justify in ps1

  - by Nate

  I'd like a multi-line zsh prompt with a right alined part, that will look something like this: 2.nate@host:/current/dir 16:00 -> I know about RPROMPT in zsh, but that has a right-aligned prompt opposite your normal prompt, which is on the same line of text as your typing. Is there a way to have a right-aligned portion to the first line of a multi-line command prompt? I'm looking for either a directive in the PS1 variable that says 'right align now' or a variable that is to PS1 what RPROMPT is to PROMPT. Thanks!

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