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• Do I really need twho different Exchange servers 2007|2010?

  - by lrosa

  Given am Exchange Server 2003 running on a dedicated server on a LAN protected by a Linux in DMZ, Microsoft says that if you upgrade, you should install two different servers (meaning two boxes, two licenses of Windows Server and two installations of Exchange) with different Exchange "server role". Exchange is installed in a safe LAN, there is a Linux relay in DMZ that feeds messages to Exchanges and gets from it the messaged to be delivered on the Net (smart relay). The mail traffic is about 2000 Internet messages/day and probably another 2000 msg/day sent by local users within the organization. The servers hosts 200 users.

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• mysql single database relocation

  - by asdmin

  I would like to know if it's possible to operate different databases on different filesystem locations. Background: we are a hosting service, which hosts mysql, web, and smtp to it's customer, but all our services (sql, smtp, http) are located in a different place. We are going to assign a single logical volume to a customer, which will accommodate the customer's mailing, weppages and (hopefully) sql database. Web pages and mailing are already covered, but I am not able to find a configuration setting which would enable me to specify the location of a database (the directory where mysql stores the DB). Let me please highlight, the target here is to relocate different databases to different locations in the filesystem, not moving them from a single place to an another (single) place. Also please do not bother answering with soft and hard symbolic links. ;) Thanks

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• Terminal Server 2003 Performance Troubleshooting

  - by MikeM

  Let me get your thoughts on terminal server performance problems. The server hosts average 25 users which, after running some numbers, on average use 600MB memory with their main applications running (web browser, adobe reader, IP phone client). All users are on the same LAN as server. We constantly experience slow response and short session lockups. Combined CPU usage is on average 10%. What appears strange to me is that the system shows 29GB physical memory with 25GB of it free. The page file usage is about 50% averaging 9GB used. Some server specs OS: Server 2003 32bit Enterprise with /PAE flag RAM: 32GB CPU: 2xQuad Core @ 2.27Ghz HD: RAID5 1.2GB After doing basic troubleshooting using performance monitor it leads me to believe that the performance problems are caused by the 32bit OS limitation in addressing full 32GB of physical memory even though the /PAE flag is used. Can anyone suggest something, troubleshooting steps that can lead to a more conclusive answer? Thanks

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• Hyper-V CPU Utilization, Good Tools?

  - by yzorg

  I just learned a ton from this post: Host CPU% doesn't include child VM CPU%, specifically I learned that both the 'host OS' and 'child VM' are siblings within the HyperVisor layer. Are there good utilities for 'watching' the total CPU and other resource counters at the HyperVisor (hardware) layer? I know perfmon (watching special Hyper-V CPU counters) is the standard answer, but I've stayed away from perfmon for ad-hoc monitoring. Is there a good OSS or free tools to 'watch' the resource utilization as I create multiple new VMs running on the server? I'm a developer, so if there aren't any good UI tools to surface this data I'd consider creating one, but only if needed. P.S. My specific scenario is I'm creating new web, SQL and back-end server VMs for new Windows 8 Server and SQL 2012 (entire application stack). I need to monitor them for utilization and know when I need to grow beyond 1 host (I'll need to split the VMs into separate hosts as I hit hardware limits of the 1st host, and diagnose problems).

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• Multiple SSH private keys for the same host

  - by Sencha

  How can I store 2 different private SSH keys for the same host? I have tried 2 entries in /etc/ssh/ssh_config for the same host with the different keys, and I've also tried to put both keys in the same file and referencing it from one hosts setting, however both do not work. More detail: I'm running Ubuntu server (12.04) and I want to connect to GitHub via SSH to download the latest source for my projects. There are multiple projects running on the same server and each project has a GitHub repo with it's own unique deloyment key-pair. So the host is always the same (github.com) but the keys need to be different depending on which repo I'm using. Different /etc/ssh/ssh_config versions I have tried: Host github.com IdentityFile /etc/ssh/my_project_1_github_deploy_key StrictHostKeyChecking no Host github.com IdentityFile /etc/ssh/my_project_2_github_deploy_key StrictHostKeyChecking no and this with both keys in the same file: Host github.com IdentityFile /etc/ssh/my_project_github_deploy_keys StrictHostKeyChecking no I've had no luck with either. Any help would be greatly appreciated!

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• Is it possible to upload only files that have been updated into a server?

  - by kamikaze_pilot

  Hi guys, Suppose I have a server accessible via FTP and it hosts websites Suppose I want to edit the website locally so it wont affect the site live, and suppose I edit a whole bunch of files, and I don't want to deal with the hassle of keeping track of which files I've edited all the time... Once I finished editing I want to upload it to the server via FTP....is there some FTP software that automatically detects which files have been edited and have only those files uploaded and overwritten rather than having me manually choosing the files I've edited (and hence having to keep track of edited files) or have me upload the entire site which is a waste of time thanks in advance

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• Apache Virtual Host Configuration

  - by Carl

  I have been searching the internet for an hour now, and I was hoping for a quick hint here so that I could solve my problem a wee bit faster. My virtual server is so far only accessible through an IP address, no DNS entry yet, and so far none needed either. The problem I have is with Apache2, the virtual hosts are puzzling me. What I need is: Access to my project (based on Symfony2) from the outside with the IP address Access to my project from localhost What I have got: Access from the outside results in rendering the websites in /var/www/vhosts/htdocs/default, while from the inside results in rendering the websites in /var/www. Why the difference? What is a recommended configuration for my use case?

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• How do I set up a one way trust when some DCs are firewalled off from each other?

  - by makerofthings7

  I have two Windows 2008 forests in Win2003 mode and I need to set up a one way trust between them. The validation button in Domains And Trusts works in one forest but not in the other. I think this is because not all DCs can see all the other DCs. I'm not sure if I need to set up the hosts file, so I did so with company.com in the respective domain along with the relevant DC. (do I need _msdcs _tcp zones etc) How do I set up a one way trust when some DCs are firewalled off from each other?

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• How to remove the dlinksearch browser search hijack

  - by Bish

  Hi Gang, For the last few weeks all the machines on my home network are having the same problem whilst browsing the internet. When the user enters an invalid URL in the browser address bar, instead of the default browser behaviour, the request is sent to http://www1.dlinksearch.com/. As far as I can tell this is all machines and all browsers. It is so consistent I am wondering whether it has anything to do with our router. We use a DLink DIR-655 router so maybe the clue is in the name :) Anyhow, I cannot figure out how to disable/remove the offending behaviour. I've checked hosts files, spyware, AV etc. etc. Anybody have any ideas? Paul P.S. Apologies if this is not the right place to ask this type of question. I'm a bit stuck

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• Scalable WordPress Host for High-Volume Site?

  - by Jonathan Eunice

  I need recommendations for a scalable web host for a high volume WordPress web site. For my purposes, high-volume might be 100K-500K visitors/hour. Might think towards a 1M/hour burst rate as a "high water mark." I know WP isn't the highest-performing platform out there (ha!), but it's non-negotiable. I can do "the usual optimizations" (e.g. put static files in a CDN, run and follow the advice of performance analyzers like YSlow, etc). But it will still be WordPress, and there will be a dozen or so plugins involved. So, where to host the site? Most "what's the best WordPress host?" discussions seem to focus on lowest-cost. I need the opposite. What are the high-volume, scalable, or clustered WordPress hosts with which you've had great experiences?

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• Downloading content greater than 2000 bytes from local network hangs in browser on Windows XP

  - by artplastika

  We have web application that runs under Tomcat in a local network. Our customers experience strange problem using this web application. Let's say Tomcat server runs on host1 and we open webapp URL in browser on host2. Any browser on host 2 starts opening page and downloading of content "hangs" for hours. We've made bunch of experiments and found that any content larger than 2000 bytes makes browser request hang. Tried in Internet Explorer 8, Opera 12, Firefox. At the same time if user opens website from internet, it works. Opening webapp from the same host1 where Tomcat is running works normally. Local network is organized with D-Link DGS-3120-48TC switch. Additional info. During experiments we've noticed XP Tweaker installed on hosts. Network settings from that tool: MTU is manually set to 1500 RWIN = 14600 Support of TCP frames larger than 64 KB is on Time to Live = 32 SACK is on

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• Can't copy Ilias-folder via FQDN, but via ip-address?

  - by Lars

  I have an Ilias-Installation, which is available through two virtual hosts: the FQDN and the ip-address. The first server is ssl only, the second plain http. Both configuration files look the same except for the SSL-part: SSLEngine on SSLCertificateFile /etc/apache2/ssl/ilias.pem In the Ilias-Webinterface, I can copy a folder on the plain http. But if I try to copy the same folder on the ssl virtual host, I get the notice, that the copy was started (rough german translation here), but the folder does not show up. There are no errors in the error-logs of php or the webserver and as said, no differences beside the ssl-part. The guys at an ilias-forum did not have an idea, either. Any ideas in here?

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• configuring linux server to send traffic to local machines using local IP address

  - by gkdsp

  Two linux servers, server1 and server2, are on the same local network (they also have access to an external network). Server2 has a local IP of 192.168.0.2 and a host name of host2.mydomain.com. QUESTION 1: If an application on server1 sends traffic to server2 using a host name of host2.mydomain.com, what determines whether this traffic is routed to server2 using the local or external network? QUESTION 2: To ensure that all traffic sent from server1 to server2 always uses the local network, could I simply include in the server1 /etc/hosts file the following? 192.168.0.2 host2.mydomain.com ...the thinking being, if the servers are always on the same network there should never be a need for server2 to send traffic to server1 via the external network (that I can think of anyway). Is this done in practice, or is some other method preferred?

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• Ubuntu 12.04 host lookups extremely slow

  - by tubaguy50035

  I'm having issues with one of my servers taking a long time to look up host names. This is an Ubuntu 12.04 box, so I've tried following the new resolvconf directives. In my /etc/network/interfaces file, I defined my name servers like this: auto eth0 iface eth0 inet static address someaddress netmask 255.255.255.0 gateway 198.58.103.1 dns-nameservers 74.14.179.5 72.14.188.5 In my /etc/resolv.conf, I see these name servers, like this: # Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8) # DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN nameserver 74.14.179.5 nameserver 72.14.188.5 On another box, I edited the resolv.conf directly as directed by my hosts' setup help files. It looks like this: domain members.linode.com search members.linode.com nameserver 72.14.179.5 nameserver 72.14.188.5 options rotate This second box has no issues with host name look ups and responds quite quickly. Could not having the domain and search directives make my look ups slow? By slow, I mean it's taking anywhere from 5 to 15 seconds to find the IP address of a host.

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• Should I limit end-user gigabit ports to avoid saturating uplink/trunk connections?

  - by Joel Coel

  We have a campus with 16 buildings and older 850nm 1Gbps fiber links between the buildings, that all come to a core switch for our servers that also uses 1Gbps ports. We're finally starting to replace our aging 10/100 end-user switches, and much of what we're looking at are 1 Gbps units. My question is, since the trunk/uplink lines are still 1Gbps, if I were to install 1 Gbps switches for end users, should I limit the ports to 100Mbps until I can also upgrade the trunks to avoid allowing a bad-behaving host to saturate a trunk line (since we're a college, we have plenty of mis-behaving hosts) and thereby create a DoS situation for a building, or will TCP congestion control typically take care of that for me? What if we have a lot of UDP traffic (games, video chats, even a small amount of bittorrent)?

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• What are steps to upgrade an cisco UCS B series system vmware vsphere from 4.1 to 5.0

  - by Gk.

  I have a Cisco UCS B-series system with 1.4 firmware running vsphere 4.1 (ESX) + Nexus 1000V. I want upgrade all that stuff to vsphere 5.0 without downtime. I tried to find any documentation describe all steps needed to do it, but cannot found anything clear. Here is my plan: Upgrade firmware of UCS from 1.4 to 2.0. Doc: http://www.cisco.com/en/US/docs/unified_computing/ucs/sw/upgrading/from1.4/to2.0/b_UpgradingCiscoUCSFrom1.4To2.0.html Upgrade all vcenter, hosts+VEM, virtual machines, datastores using VMWare best practice. Is it OK? Am I missing something? Thank you, giobuon.

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• DNS Replication issue

  - by BillN

  We host the DNS for our domain. Two weeks ago, the developer requested that we setup a new zone 'dev.ourdomain.com' and place two host records in it my.dev.ourdomain.com and admin.dev.ourdomain.com. We added the zone to our DNS and added A records for the host. Now a week later, some DNS servers like google (8.8.8.8) and gtei (4.2.2.2) will resolve the hosts, but others like OpenDNS (208.67.222.222 ) and ATT Uverse (68.94.156.1) cannot resolve it. Any Ideas?

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• Apache Subversion and Sudo - Why can't I resolve this hostname?

  - by Hollowsteps

  Okay, I made a mistake and I'll be the first to admit I'm new at this setup. I built a bare bones kit, installed Ubuntu on it, and attempted to set up a source control server for a project some friend and I were going to work on. Unfortunately, I screwed up. I followed a dodgy tutorial from 2005 and when it didn't work, started mixing and matching trying to get to the source of my problem. So now I sit before you, a broken and miserable man. Desperate to escape this annoying echo of 'Unable to resolve host computer.repositoryname.com', I uninstalled apache and subversion. That did not fix it. Next I tried to edit my /etc/hosts, going so far as to remove the reference to '127.0.1.1 computername'. Still I'm plagued. I know I messed up, is there any way to track down this wayward bug?

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• Configuring Linux Network

  - by Reiler

  Hi I'm working on some software, that runs on a Centos 5.xx installation. I'ts not allowed for our customers to log in to Linux, everything is done from Windows applications, developed by us. So we have build a frontend for the user to configure network setup: Static/DHCP, ip-address, gateway, DNS, Hostname. Right now I let the user enter the information in the Windows app, and then write it on the Linux server like this: Write to /etc/resolv.conf: Nameserver Write to /etc/sysconfig/network: Gateway and Hostname Write to /etc/sysconfig/network-scripts/ifcfg-eth0: Ipaddress, Netmask, Bootproto(DHCP or Static) I also (after some time) found out that I was unable to send mail, unless I wrote in /etc/hosts: 127.0.0.1 Hostname All this seems to work, but is there a better/easier way to do this? Also, I read the network configuration nearly the same way, but if I use DHCP, I miss som information, for instance the Ip-address. I know that I can get some information from the commandline (ifconfig), but I dont get for instance Hostname, Gateway and DNS. Is there a commandline tool that will display this?

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• XAMPP localhost and 127.0.0.1 don't work but computer name does work

  - by Steven

  I am running on a vista. Localhost and 127.0.0.1 do not work anymore but my computer name still works. Localhost and 127.0.0.1 only show a blank page however using my computer name can access xampp homepage as well as my server files. I am assuming there is something wrong with my hosts file but when i checked it looks fine: 127.0.0.1 localhost is the only thing in there that is not commented out, which seems right according to what I've seen on the web so far. I had a trojan recently that I got rid of so I believe that definitely has something to do with it. It was msa.exe among potentially others but I think I got rid of it with Malwarebytes. This is the only issue that is left. Thanks!

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• Dynamic Subdomains

  - by crash

  On my new site I want to have dynamic subdomains. I'm trying to make it so that the subdomains use the same web root as the main domain, all under a single CodeIgniter installation. For example, subdomain.example.com would lead to example.com/subdomain, which is actually example.com/index.php/subdomain. I've already the DNS, virtual hosts set up but I"m getting caught up on the .htaccess. The effect of the linked htaccess is that when navigating to any subdomain, it gets caught up in an infinite loop. (Error log after one request.) It's the same effect for www., which should just resolve to the main domain.

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• MMS gets hostname from uname and can't connect to it

  - by Adam Monsen

  I'm trying to get 10gen's MongoDB Monitoring Service monitoring my 3-node replica set. The replica set running in an AWS VPC. Each node runs on a different [virtual] machine. Assume their IPs are 192.168.1.1 (primary or secondary), 192.168.1.2 (primary or secondary), 192.168.1.3 (arbiter). From a quick look at the source, MMS appears to get the hostname of the machine it is running on like so: platform.uname()[1] For my VPC EC2 instance, this returns something like ip-192-168-1-1 MMS then tries to connect to this hostname, which does not resolve. I'd rather just use IP addresses (since they're always static), but it seems like the hardcoded use of platform.uname()[1] in mmsAgent.py precludes that. So, what's an elegant way out of this? Hack /etc/hosts? I'm not setting up a DNS server just for this. Maybe I'm just misunderstanding how to configure MMS.

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• exim4: multiple domains/IPs

  - by ButterdBread

  On my VPS I have 3 IPs which all have their own domain and their own reverse-DNS records. I have a website on each domain, sending emails. The problem is: the emails are rejected by many hosts because the reverse dns doesn't fit the host in the helo. All the emails are sent from the primary IP and therefore only one of the three domains work. I am looking for a way for exim to check which email adress i'm using to send the email and adapt the domain/IP transmitted in the helo. I have already tried many configurations but nothing has worked up to now. Simply changing MX-Records is impossible too, as I recieve (and also send) email via gmail and I don't want to set up my own webmail. Does anyone know a solution?

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• Relation between Apache and DNS configuration

  - by KayKay

  I configured my DNS (bind9) to accept every subdomain, using a wildcarded 'A' record : *.mydomain.tld. IN A xx.xx.xx.xx I configured Apache to serve some specific subdomains using virtual hosts : <VirtualHost *:80> ServerName sub1.mydomain.tld ServerAlias sub1.mydomain.tld JkMount / sub1JK JkMount /* sub1JK </VirtualHost> when I ping from a remote computer on a subdomain configured in apache I get a response. When I ping on a subdomain that is not configured in apache, the host is not found. I don't understand why apache configuration would affect DNS resolution like this? I would appreciate any information that helps me understand this. Thanks a lot.

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• ASA Slow IPSec Performance

  - by Brent

  I have a IPSec link between two sites over ASA 5520s running 8.4(3) and I am getting extremly poor performance when traffic passes over the VPN. CPU on the device is 13%, Memory at 408 MB, and active VPN sessions 2 so the load on the device is particularly low. Screenshot of wireshark file transfer between the two hosts over the VPN: The large amount of Header checksum failures is alarming, but I am not sure what to check now. I perf is showing around 4-5 Mbit/sec with differing TCP window sizes. Show Run on the ASA http://pastebin.com/uKM4Jh76 Show cry accelerator stats http://pastebin.com/xQahnqK3

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