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• Error when adding to the domain : the specified server cannot perform the requested operation

  - by James

  When we add computers to the domain in Windows 7, we get the error: Changing the Primary Domain DNS name of this computer to "" failed. The name will remain "domain.com". The error was: The specified server cannot perform the requested operation. This happens on multiple computers and retrying yields the same result. Despite the error, the computer is still able to login to the domain ok. The DCs are windows 2003. Has anyone found a way to get rid of this error? Any help is appreciated.

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• IPv6 6to4 on Windows Server

  - by Graham Wager

  I'm looking for a relatively simple guide to setting up an IPv6 tunnel properly. This network currently has a server (Windows Server 2008R2) running RRAS that establishes connectivity to the internet using a demand-dial PPPoE connection and handles the NAT. It also hosts a DNS server and DHCP. My ISP does not support IPv6, but I have a static IPv4 address. I've read about 6to4 and signed up at tunnelbroker.net, but quickly felt out of my depth. How do I configure my network to use it, and how I should configure my DHCP server with regards to IPv6 addresses?

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• How to use 2 or more internet connections on the same network?

  - by Rogue

  Living in a joint family we have 3 internet connections, each floor has one internet connection which is split per floor. Each internet connection is shared between 4-5 computers using a switch per floor. Each of these internet sharing networks are independent of each other. What I want to achieve here is a local network (for local messenger and file sharing) that can combine all the 3 independent networks, problem is that whenever I try to do that the whole network tends to use just one internet connection. I have all the necessary hardware. How do I solve this problem, one approach could be that I could get one PC to act as a server and bridge the internet connections and then the whole network would have to access the internet through this server. Theoretically this could be possible but I have never tried this approach in real life. Also if certain computers need be restricted from internet access how would this be possible on the same network?

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• sendmail - DSN: Name Server host not found

  - by Daniel Mitchell

  I've recently setup a new backup server and have configured sendmail with a smart_relay_host Except every email from the command line doesn't go anywhere. From mail.log: Oct 3 14:32:52 **back01 sm-mta[16570]: p93DWqtC016568: to=<[email protected], ctladdr= (0/0), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=120762, relay=10.2.30.60, dsn=5.1.2, stat=Host unknown (Name server: 10.2.30.60: host not found) Oct 3 14:32:52 ***back01 sm-mta[16570]: p93DWqtC016568: p93DWqtC016570: DSN: Host unknown (Name server: 10.2.30.60: host not found) DNS is working correctly on this box. I can do forward and reverse lookups. I can also telnet to the mail relay and send a message that way. I'm stumped, any suggestions?

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• How to configure Windows Server 2008 DHCP to supply unique subnet to a remote site?

  - by caleban

  The Main site hosts the only Windows Server. Windows Server 2008 R2 Domain Controller running AD, DNS, DHCP, Exchange 2007. Remote site has no Windows server. Main site subnet is 192.168.1.0/24 Remote site subnet is 192.168.2.0/24 The Windows Server at Main site is supplying 192.168.1.0/24 via DHCP to hosts at the local site where it resides. Is it possible to configure that Windows Server to supply 192.168.2.0/24 to hosts at the Remote site and if so how? We could use the Cisco router at the Remote site to supply DHCP but if possible we'd like to use the Windows Server at the Main site to supply DHCP.

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• How do I configure Shrewsoft's VPN client to only route traffic to a certain IP address through the VPN?

  - by dommer

  We're using Shrewsoft's VPN client to connect to a third party development server. However, it seems to be configured to send all or nothing through the VPN. The devs have to disconnect from the VPN to get email/internet access back. The server that needs to be accessed via the VPN is on a specific (local - 10.x.x.x) IP address and a specific ports. Can we configure the Shrewsoft client application to only route traffic to that one address and/or port through the VPN and to route anything else though the usual channels? If so, how is it done? I'm not a VPN specialist and the options are confusing. In the absence of any Shewsoft VPN client specific advice, what should I be search for? Split tunnels?

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• How to make a jQuery plugin (the right way)?

  - by macek

  I know there are jQuery cookie plugins out there, but I wanted to write one for the sake of better learning the jQuery plugin pattern. I like the separation of "work" in small, manageable functions, but I feel like I'm passing name, value, and options arguments around too much. Is there a way this can be refactored? I'm looking for snippets of code to help illustrate examples provided with in answers. Any help is appreciated. Thanks :) example usage $.cookie('foo', 'bar', {expires:7}); $.cookie('foo'); //=> bar $.cookie('foo', null); $.cookie('foo'); //=> undefined Edit: I did a little bit of work on this. You can view the revision history to see where this has come from. It still feels like more refactoring can be done to optimize the flow a bit. Any ideas? the plugin (function($){ $.cookie = function(name, value, options) { if (typeof value == 'undefined') { return get(name); } else { options = $.extend({}, $.cookie.defaults, options || {}); return (value != null) ? set(name, value, options) : unset(name, options); } }; $.cookie.defaults = { expires: null, path: '/', domain: null, secure: false }; var set = function(name, value, options){ console.log(options); return document.cookie = options_string(name, value, options); }; var get = function(name){ var cookies = {}; $.map(document.cookie.split(';'), function(pair){ var c = $.trim(pair).split('='); cookies[c[0]] = c[1]; }); return decodeURIComponent(cookies[name]); }; var unset = function(name, options){ value = ''; options.expires = -1; set(name, value, options); }; var options_string = function(name, value, options){ var pairs = [param.name(name, value)]; $.each(options, function(k,v){ pairs.push(param[k](v)); }); return $.map(pairs, function(p){ return p === null ? null : p; }).join(';'); }; var param = { name: function(name, value){ return name + "=" + encodeURIComponent(value); }, expires: function(value){ // no expiry if(value === null){ return null; } // number of days else if(typeof value == "number"){ d = new Date(); d.setTime(d.getTime() + (value * 24 * 60 * 60 * 1000)); } // date object else if(typeof value == "object" && value instanceof "Date") { d = value; } return "expires=" + d.toUTCString(); }, path: function(value){ return "path="+value; }, domain: function(value){ return value === null ? null : "domain=" + value; }, secure: function(bool){ return bool ? "secure" : null; } }; })(jQuery);

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• SED and Unicode Quotation Marks

  - by Jonathan Patt

  When testing against this string: “… so that’s that… ” The following should, but does not, match the opening quotation mark and following ellipsis and space: sed "s/\([“‘\"']…\) /\1/g" However, this correctly matches the second ellipsis and following space and closing quotation mark: sed "s/… \([”’\"'.!?]\)/…\1/g" If I split the first apart it works fine: sed -e "s/\(“…\) /\1/g" \ -e "s/\(‘…\) /\1/g" \ -e "s/\(\"…\) /\1/g" \ -e "s/\('…\) /\1/g" So why doesn't it work when it's grouped together? Especially when it works fine with the closing quotation marks.

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• Highly Available Web Application (LAMP)

  - by Anthony Rizzo

  I work for a small company who provides a web application for thousands of users. Earlier this year they had one server hosted one company. We recently acquired another server in a different location with the hopes of one day making this a redundant failover machine. I understand what to do with the mysql replication, I plan on using a master-master replication setup, and rsync to sync the scripts and files, however I am at a stand still about how to configure the fail-over. Ideally I would like the two machines to accept requests, like a round robin dns, however if one machine goes down I do not want requests to go that machine. All of the solutions I am come across assumes high availability of servers in the same location, these servers are in two completely different locations with different public ip address. Any help would be great. Thanks

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• RRAS Svr on win 2003 provides same gateway as the ip to vpn clients and subnet as 255.255.255.255

  - by Amit Phatarphekar

  Hello - I've setup a RRAS Svr on win 2003 svr, to provide VPN access to clients. I've followed all directions in microsoft documentation to finish the setup. A VPN client successfully connects when I connect to the VPN svr. But when I look at the ipconfig info, I see that the IP and Gateway are same and subnet is 255.255.255.255. Example IP - 10.0.0.121 Gateway - 10.0.0.121 subnet - 255.255.255.255 DNS - 10.0.0.12 What am I doing wrong?

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• WDS - Clients receive Error: PXE-E53: No boot filename received

  - by Ninja2k

  I have setup WDS on Windows 2008 server in a Vmware box so I can practise setting up WDS,the server has DNS and DHCP as well as AD, the boot image is confirmed as working but when my clients try to boot up it does not work. I have checked the following: Clients can ping the WDS server. The WDS service is started Boot images for X86 and X64 are deployed. HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\WDSServer\Providers\WDSPXE UseDhcpPorts has been set to 0 My clients just receive Error: PXE-E53: No boot filename received. Any idea what could be wrong?

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• Can ping localhost but can't browse

  - by Anna

  I know this is a pretty common question but I did my research and couldn't find a solution for this issue. I'm configuring a development application server and I came to the point where I can ping both localhost and 127.0.0.1, but I cannot browse either of them from IE or Firefox. I can browse and ping other websites (such as google) just fine. I tried flushing the dns (ipconfig /flushdns), restarting the IIS Admin service, restarting IIS itself, etc, and nothing seems to work. The results from ipconfig /all shows IP Rounting Enabled = No and WINS Proxy Enabled = No. Hwat is intriguing to me is that I compared everything in IIS in the dev environment with the production environment and the settings are the same, but I can browse localhost in production, but not in dev! What could be causing the inability to browse localhost and 127.0.0.1 from IE and Firefox?

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• Running "ipconfig /displaydns" in cmd prompt still displays results even after I run "ipconfig /flushdns"

  - by 400_THE_CAT

  Whenever I run "ipconfig /displaydns" I get a long list of sites even after running "/flushdns." I thought my results should be empty considering /flushdns. Is this normal behavior? I also noticed that after I run /flushdns and browse the internet for a couple of hours, my list of cached sites doesn't really change. Google.com, for example isn't on the list but a bunch of sites I've never visited do show up in my DNS cache. Can someone explain this?

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• Want to SASL/TLS authentication

  - by Naval

  I want to send mail from remote client from my server(centos 5 and 64 bit) for this i need to sasl auth but i have no idea about it what changes i have to make in my server and client here I want to make things more clear my server's hostname/Ip is = test02.s80.in/176.67.172.209 now i want to authenticat remote client vps2.smail.info and vps1.smail.info to deliver mail .. so plz help me if any systematic way to do sasl/tls authentication for these clients... i am using DNS load-balancing(round-robin) mx record lookup technique for load balancing..

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• How to Setting up Amazon EC2 with own OS and DB?

  - by SLim

  i got my own version of OS and DB which are window server 2008 Hyper-V R2 and Sql server R2 2008 both in enterprise version may i know how to configure it up and running ? with amazon EC2, what other is a must combination to make it run ? also how could i install the operating system and DNS ? i never doing server before, but i just need something like VPS to support my development and testing. Amazon Ec2 seem the best and cheapest service due to only $1 per hour.

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• ipconfig /release not working, why?

  - by barlop

  ipconfig /release is not working, why is that? here is a sequence where I put my cable in get an IP, try ipconfig /release and it tells me it can't release wireless, but there is no wireless connection. i'm just trying to release the wired one. C:\>ipconfig Windows IP Configuration Ethernet adapter Wireless Network Connection: Media State . . . . . . . . . . . : Media disconnected Ethernet adapter Local Area Connection: Media State . . . . . . . . . . . : Media disconnected Fine so I plug my cable in C:\>ipconfig Windows IP Configuration Ethernet adapter Wireless Network Connection: Media State . . . . . . . . . . . : Media disconnected Ethernet adapter Local Area Connection: Connection-specific DNS Suffix . : IP Address. . . . . . . . . . . . : 0.0.0.0 Subnet Mask . . . . . . . . . . . : 0.0.0.0 Default Gateway . . . . . . . . . : C:\>ipconfig Windows IP Configuration Ethernet adapter Wireless Network Connection: Media State . . . . . . . . . . . : Media disconnected Ethernet adapter Local Area Connection: Connection-specific DNS Suffix . : IP Address. . . . . . . . . . . . : 192.168.1.8 Subnet Mask . . . . . . . . . . . : 255.255.255.0 Default Gateway . . . . . . . . . : 192.168.1.254 Fine so from above, it clearly has an iP C:\>ipconfig /release Windows IP Configuration No operation can be performed on Wireless Network Connection while it has its me dia disconnected. C:\>

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• What is a SIP 'Gateway' and how is different from a SIP Proxy/Registrar?

  - by Shrey

  Recently I started looking at SIP implementation for a future work. I was reading (Googling) about what SIP means and how to go about implementing a end-to-end SIP enabled VoIP network. What I did not get is what use does a SIP Gateway is for? How different is it with respect to SIP proxy servers or a SIP DNS/Locator like server? I understand probably QoS would be one primary factor - like dedicating a set bandwidth for SIP/VoIP specific I/O over a network. Anything else? Can anyone help me with any other hints/pointers? I fully understand that is quite a basic question - but I really couldn't find any text which could clear my doubt about what 'Gateway' would mean in SIP context and what differentiates it from other SIP based network components (like Softphones, Proxies etc). Thanks a lot.

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• LAMP Server without single failure point + Global Server Load Balancing?

  - by José Nobile

  I want implement a LAMP Server (Linux Apache MySQL PHP) without a single failure point and with Global Server Load Balancing. I have a server in Cali, Colombia, and other server will be installed in Melbourne, Australia, user in America can use the Cali Server and in Europe, Asia, Africa or Oceania use the Melbourne Server. If any server fail (or load is excessively high), a server must answer all request. Data in MYSQL must be in sync, php files, any configuration in both server must be in sync. I read about of Google DNS Server 8.8.8.8 and 8.8.4.4 and ANY Cast, also about MySQL semisynchronous replication and MySQL Cluster, but what about other things, as crontabs, and the configurations in server? The solution can't depend of APNIC or BGP, only open source software running in Linux.

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• Cannot acess the new cloned server even after new IP address assignment

  - by tough

  I was able to clone a Ubuntu 10.04 server residing in Cloud. It appeared that I was not getting some IP for the new VM so I followed some of these: # cd /etc/udev/rules.d # cp 70-persistent-net.rules /root/ # rm 70-persistent-net.rules # reboot I didn't follow the later commands as I was unable to see two eth MACs as available in the referenced site. After this I am able to see some the IP for it, and is different form the original IP, I have added new IP to DNS server. Now when I try to access it with its assigned(new) domain it is directed to the old server. I can see both the VMs running with different IP. Where I might have gone wrong, I am new to this admin thing.

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• Audio splitting and noise removal on Windows

  - by pts

  My mother has about 100 hours of audio in a mix of MP3 and WAV files, the digitized versions of her vinyl records. Each file contains about 5 songs with a few seconds of (noisy) pause between them. My mother needs software for Windows XP with which she can listen to the files, find the gaps manually, split the files at the gaps found, reduce noise on each song, and export the songs to individual MP3 files. My mother has very limited software user skills and affinity, and she doesn't speak English. The simpler the software, the better for her, even if noise reduction is worse than with a more sophisticated, but more complicated software. I'd prefer free software, freeware or shareware (which can do all above). Please recommend something much simpler than Audacity. The software should guide the user through the process, always showing the next few available steps, and being intuitive in the sense that there are only a few allowed actions and it's obvious what they are and how to activate them. Which software would you recommend?

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• IRC Services with failover support?

  - by insertjokehere

  I run a single server (call it 'server A') IRC 'network', and thank to the generosity of some friends, I have been given a second server ('server B') that I can run an IRCd on in order to provide redundancy in case server A crashes. This is fine, I can set up a round-robin DNS with the servers linked. The problem I have is what to do about services? Does anyone know of a way to get the services to 'fail over' in case of a server failure? Eg, Server A starts off running the services, but suddenly crashes. Server B detects this and starts its own copy of the services (ideally with the same configuration and data as the services on Server B) One solution that comes it mind is to write a bot that each server runs, that sit in a channel periodically checking if the bot from the other server is in the channel. If it is, then all is well. If not, then failover. I would prefer not to have to code this myself though We are currently using Unreal IRCd and Anope services on Linux

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• Monitoring User Login time

  - by beakersoft

  Hi, i have recently been given the task of trying to work out why the login time (not machine boot time) for some of our users seems slow. The vast majority of clients (95%) are running on XP sp3, Windows 2003 domain controlers. Most users have the same model of machine. I would like to be able to see how long each of the polices are taking to load (if possable split user and computer) and any other info that might help (services starting etc) I changed the userenvdebuglevel reg option to generate the userenv.log file but it did'nt contain very much info Thanks Luke

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• Backup virtual hard disk

  - by Harshil Sharma

  I have a VM created in VMWare Player. It's VHD is currently sized 17 GB, split among multiple 2 GB files. The host OS is Windows 8. I use CrashPlan in host OS for file backup. The problem is, whenever I use the VM, CrashPlan detects all parth of VHD as altered and backs up the 17 GB VHD. WHat I want is a software that can run on host OS (Windows 8), treat the VHD as a physical hard disk and create incremental backups of the VHD, includeing all files, programs and the OS

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• MailServer Setting

  - by Ashian

  Hi I have a mail server on windows 2003 ( MailEnable) I setup mail server to authonticate users before sending mail. (This mail server requires authentication when attempting to send to a non-local e-mail address) but from yesterday , without change any setting I got many Message Delivery Delay from mail server for email address that I never try to sending email: I afraid that I someone try to sending Spam from my mail server,How can I check this possiblity ? and fix the problem. Thanks MailEnable: Message delivery has been delayed. Message is waiting at *.info for delivery to mailin-03.mx.aol.com. The message will be retried for another 29 hours. Reason: Mail Server for aol.com could not accept your email at this time. MailEnable will keep trying to deliver this message and will notify you of any progress. The remote mail server returned the error: 421-: (DNS:NR)

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• IPv6 in a Small Business

  - by Martyn

  I’ve been tasked to identify a new server and IT equipment for the company I work for (employees <20). I’m looking at getting a SBS 2011 Standard box. My Question is: Apart from ensuring that our router is IPv6 compliant, is there anything else I need to do/investigate to ensure that we won’t have IPv6 related problems in the future? When investigating this I can only find references to DNS Mangers etc. The SBS 2011 box will be used for exchange and remote log in access – it won’t be hosting any websites. Also will VOIP phone systems be affected by IPv6? (We are running a rather old VOIP system, would that need to be updated?

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