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  • How to test if DNS information has propagated?

    - by Andrew
    I set up a new DNS entry for one of my subdomains (I haven't set up any Apache virtual hosts or anything like that yet). How can I check that the DNS information has propagated? I assumed that I could simply ping my.subdomain.com and assume that if it could resolve, it would show the IP address I specified in the A record. However, I don't know if I am assuming correctly. What is the best way to check this information?

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  • User permission settings on DNS with windows 2003 server R2 standard edition

    - by Ghost Answer
    I have windows server 2003 r2 standard edition and some XP OS clients systems. I have created the DNS and profiles for all user. Now I want to authorized some users to installation of softwares, remove softwares and other such kind of things. How to I make such kind of policies for all different users on DNS. Please help me. May be this question can be same for another but I didn't get the solutions.

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  • amazon ec2 assign domain name

    - by user41999
    1.amazonaws doesnt provide dns service? 2.i can only assign static ip through ec2 so the only way to assign domain name is to use third party dns service? which do you all recommend? i need one that able to add SRV

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  • Windows: make browsers do a DNS-lookup even when the Computer is offline

    - by leosok
    I use a local DNS-Server (MicroDNS) which I set via netsh to redirect any query to my own page. A little webserver running inside my software answering something like "this page is not whitelisted". It works when connected to the Internet but does not work when offline. The Browsers stop looking up the DNS. How could I make Browsers go to my page, whatever I enter in the address line, WHEN OFFLINE?

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  • slave dns server, resolv.conf configuration

    - by Tim the Enchanter
    I have two servers (a master and slave) running DNS (bind). What should the /etc/resolv.conf file look like for the master and the slave? For example should the servers running the DNS have only : nameserver 127.0.0.1 or should they refer to the I.P. addresses of each server, as the other servers on the network do : search <mydomain>.co.uk nameserver 192.168.1.52 nameserver 192.168.1.57

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  • Dns server: how can I configure a dns server to track down a pc name in a dhcp enviroment?

    - by Pitto
    I have a dhcp in my home and I would like to setup a dns server too. I would like to implement a linux solution but I think I can't get hands on without understanding - very superficially - if I can achieve such result. My pc (hostname: test) gets a 192.168.1.7 from dhcp. Its dns server is my router (192.168.1.1). How can the router relate my ip change (as soon as the lease is over) to my hostname?

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  • DNS MX record workaround

    - by onemach
    I use a tk domain name and another web host to host my blog site. I redirect DNS query to xxxhost.[myhost].com and tell my web host my domain name. (since my web host is virtual one) This works OK. But now I want to use an email service provided by third party, which requires adding a MX record to my DNS service. But this cannot be done on my web host management pages. Is there any workaround for this?

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  • With dnsmasq as the DNS server, 'dig' and 'ping' succeed while 'nslookup' fails

    - by einpoklum
    I installed dnsmasq on a machine of mine (It's a Kubuntu 12.04 LTS), backed only by /etc/hosts (no connection to the Internet until later). Now, if I dig mymachine, I get 192.168.0.1, but if I try to nslookup mymachine, I get: >> connection timed out; no servers could be reached Tried also nslookup mymachine.mynicedomain.org - didn't work either. pinging (Edit:) succeeds. This happens both on the server machine itself and on other machines on the network. How can I the DNS lookups to work? What problem is preventing nslookup from succeeding? Additional Information In the server's /etc/hosts: 192.168.0.1 mymachine In the server's nsswitch.conf: hosts: files mdns4_mininal [NOTFOUND=return] dns mdns4 (admittedly, this is a bit weird; but I also tried: hosts: files dns instead, with the same effect) In resolv.conf (which is generated by dnsmasq): nameserver 127.0.0.1 search mynicedomain.org In the server's /etc/hosts.allow: domain: ALL In the other machines' /etc/resolv.conf (this is set by the DHCP client): nameserver 192.168.0.1 search mynicedomain.org Relevant netstat output on the server: Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 0 127.0.0.1:53 0.0.0.0:* LISTEN tcp 0 0 192.168.0.1:53 0.0.0.0:* LISTEN Finally, here's the ipconfig output from one of the client machines on the network (running Windows 7): Connection-specific DNS Suffix . : mynicedomain.org Description . . . . . . . . . . . : Intel(R) 82579LM Gigabit Network Connection Physical Address. . . . . . . . . : 12-34-56-78-9A-BC DHCP Enabled. . . . . . . . . . . : Yes Autoconfiguration Enabled . . . . : Yes IPv4 Address. . . . . . . . . . . : 192.168.0.50(Preferred) Subnet Mask . . . . . . . . . . . : 255.255.255.0 Lease Obtained. . . . . . . . . . : Sunday, October 20th 2013 16:20:25 Lease Expires . . . . . . . . . . : Sunday, October 20th 2013 18:20:24 Default Gateway . . . . . . . . . : 192.168.0.1 DHCP Server . . . . . . . . . . . : 192.168.0.1 DNS Servers . . . . . . . . . . . : 192.168.0.1 NetBIOS over Tcpip. . . . . . . . : Enabled Notes: May be related to this question.

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  • SPF record doesn't work (not sure which DNS server to tweak)

    - by Ion
    Problem: Google (and perhaps others) marks our emails as SPF neutral. Let me give you some background about the setup: initially got a dedicated server (Hetzner) with Plesk installed to host a domain/web application, let's say: bigjaws.com. Plesk automatically creates a DNS zone for it with some records for the various services it provides out of the box, e.g. webmail.bigjaws.com as a CNAME to bigjaws.com to provide Horde/whatever, etc. Let me point out four relevant of these records (where XXX.XXX.XXX.158 is our dedicated IP): bigjaws.com. A XXX.XXX.XXX.158 mail.bigjaws.com. A XXX.XXX.XXX.158 bigjaws.com MX (10) mail.bigjaws.com. bigjaws.com. TXT v=spf1 +a +mx -all The above records are not(?) valid anymore though, because after using this dedicated server for a while, our site got bigger and bigger so we decided to move our operations over to AWS (EC2, RDS, ELB, etc), but we retained the mail functionality as is, i.e. emails from [email protected] are sent by connecting to our dedicated server where Plesk takes care of things. This was decided in order not to setup anything from scratch. Of course for all DNS-related things we now use Route53. In Route53 I have the following records: mail.schoox.com. A XXX.XXX.XXX.158 bigjaws.com. MX (10) mail.bigjaws.com bigjaws.com. SPF "v=spf1 +ip4:XXX.XXX.XXX.158 +mx ~all" From my understanding of SPF, the SPF status should have been passed: I designate that all email being sent by bigjaws.com from XXX.XXX.XXX.158 are valid/not spam (I added +mx there but I'm not sure if needed). When a mail server receives an email, doesn't it lookup the SPF record of the domain and checks against the IP it got the email from? Checking with spfquery: root@box:~# spfquery -ip XXX.XXX.XXX.158 -sender [email protected] -rcpt-to [email protected] StartError Context: Failed to query MAIL-FROM ErrorCode: (2) Could not find a valid SPF record Error: No DNS data for 'bigjaws.com'. EndError noneneutral Please see http://www.openspf.org/Why?id=employee1%40bigjaws.com&ip=XXX.XXX.XXX.158&receiver=spfquery : Reason: default spfquery: XXX.XXX.XXX.158 is neither permitted nor denied by domain of bigjaws.com Received-SPF: neutral (spfquery: XXX.XXX.XXX.158 is neither permitted nor denied by domain of bigjaws.com) client-ip=XXX.XXX.XXX.158; [email protected]; If I go to the address listed above (openspf.org) it tells me that the message should have been accepted(!): spfquery rejected a message that claimed an envelope sender address of [email protected]. spfquery received a message from static.158.XXX.XXX.XXX.clients.your-server.de (XXX.XXX.XXX.158) that claimed an envelope sender address of [email protected]. The domain bigjaws.com has authorized static.158.XXX.XXX.XXX.clients.your-server.de (XXX.XXX.XXX.158) to send mail on its behalf, so the message should have been accepted. It is impossible for us to say why it was rejected. What should I do? If the problem persists, contact the bigjaws.com postmaster. Also, here are some headers from an email sent by one of our [email protected] addresses to a gmail.com address (by the way, bigjaws.de listed in the "Received: from" field was the initial domain hosted on the dedicated server before adding the .com one -- both are still listed as separate subscriptions under Plesk). Delivered-To: [email protected] Received: by 10.14.177.70 with SMTP id c46csp289656eem; Wed, 23 Oct 2013 01:11:00 -0700 (PDT) X-Received: by 10.14.102.66 with SMTP id c42mr306186eeg.47.1382515860386; Wed, 23 Oct 2013 01:11:00 -0700 (PDT) Return-Path: <[email protected]> Received: from bigjaws.de (static.158.XXX.XXX.XXX.clients.your-server.de. [XXX.XXX.XXX.158]) by mx.google.com with ESMTPS id l4si19438578eew.161.2013.10.23.01.10.59 for <[email protected]> (version=TLSv1 cipher=RC4-SHA bits=128/128); Wed, 23 Oct 2013 01:10:59 -0700 (PDT) Received-SPF: neutral (google.com: XXX.XXX.XXX.158 is neither permitted nor denied by best guess record for domain of [email protected]) client-ip=XXX.XXX.XXX.158; Authentication-Results: mx.google.com; spf=neutral (google.com: XXX.XXX.XXX.158 is neither permitted nor denied by best guess record for domain of [email protected]) [email protected] DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=default; d=bigjaws.com; b=WwRAS0WKjp9lO17iMluYPXOHzqRcOueiQT4rPdvy3WFf0QzoXiy6rLfxU/Ra53jL1vlPbwlLNa5gjoJBi7ZwKfUcvs3s02hJI7b3ozl0fEgJtTPKoCfnwl4bLPbtXNFu; h=Received:Received:Message-ID:Date:From:User-Agent:MIME-Version:To:Subject:Content-Type:Content-Transfer-Encoding; Received: (qmail 22722 invoked from network); 23 Oct 2013 10:10:59 +0200 Received: from hostname.static.ISP.com (HELO ?192.168.1.60?) (YYY.YYY.ISP.IP) by static.158.XXX.XXX.XXX.clients.your-server.de. with ESMTPSA (DHE-RSA-AES256-SHA encrypted, authenticated); 23 Oct 2013 10:10:59 +0200 Message-ID: <[email protected]> Date: Wed, 23 Oct 2013 11:11:00 +0300 From: BigJaws Employee <[email protected]> User-Agent: Mozilla/5.0 (Windows NT 6.2; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.0.1 MIME-Version: 1.0 To: [email protected] Subject: test SPF Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit test SPF Any ideas why SPF is not working correctly? Also, are there any DNS settings that are not needed anymore and create a problem?

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  • Open Source Utilization Questions: How do you lone wold programmers best take advantage of open sour

    - by Funkyeah
    For Clarity: So you come up with an idea for a new program and want to start hacking, but you also happen to be a one-man army. How do you programming dynamos best find and utilize existing open-source software to give you the highest jumping off point possible when diving into your new project? When you do jump in where the shit do you start from? Any imaginary scenarios would be welcome, e.g. a shitty example might be utilizing a open-source database with an open-source IM client as a starting off point to a make a new client where you could tag and store conversations and query those tags at a later time.

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  • Does it matter to you that a software is "available source" but not "open source"

    - by ccpod
    You probably know the list of open source licenses officially approved by the OSI. Most notably I guess would be the GPL, MIT, [insert your favorite license here]. I recently ran into a project which although was open source (the creator made all source code available), was not officially open source under one of those official licenses. It released the source, but made no promise to release the source in the future. It allowed modification suggestions, but made no promises to accept patches and disallowed external distribution of externally-patched versions. It allowed the use of the software in commercial or paid projects, but disallowed the sale of the software itself. I suppose it could be called "available source" not open source as we like to think of it. I can see why the management team of a company wouldn't want to do business with this software. They can't fork it, they can't sell it, they can't create their own version of the software and distribute it or sell it. But would it matter to you as part of a software engineering team who's just using this software? I can still get my work done with it, I can use it in a project for which I'm paid (but I can't sell the software itself, which I'm not in the business of doing anyway), and I can make changes to the code to make it behave differently for my needs (but I can't make those modifications public), and if I do want those modifications officially made available to others, the approval is up to the project itself and they choose whether to incorporate them in an official release or not. So we know that a company that wants to base its business on this "available source" software can't do that, but as someone from the software engineering team, would those differences matter to you or do they seem less relevant? Curious what others think of this.

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  • Does it matter to you that a software is "available source" but not "open source"

    - by ccpod
    You probably know the list of open source licenses officially approved by the OSI. Most notably I guess would be the GPL, MIT, [insert your favorite license here]. I recently ran into a project which although was open source (the creator made all source code available), was not officially open source under one of those official licenses. It released the source, but made no promise to release the source in the future. It allowed modification suggestions, but made no promises to accept patches and disallowed external distribution of externally-patched versions. It allowed the use of the software in commercial or paid projects, but disallowed the sale of the software itself. I suppose it could be called "available source" not open source as we like to think of it. I can see why the management team of a company wouldn't want to do business with this software. They can't fork it, they can't sell it, they can't create their own version of the software and distribute it or sell it. But would it matter to you as part of a software engineering team who's just using this software? I can still get my work done with it, I can use it in a project for which I'm paid (but I can't sell the software itself, which I'm not in the business of doing anyway), and I can make changes to the code to make it behave differently for my needs (but I can't make those modifications public), and if I do want those modifications officially made available to others, the approval is up to the project itself and they choose whether to incorporate them in an official release or not. So we know that a company that wants to base its business on this "available source" software can't do that, but as someone from the software engineering team, would those differences matter to you or do they seem less relevant? Curious what others think of this.

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  • ODF (Open Document Format) para ISVs - 16/Dez/10

    - by Paulo Folgado
    Os ISVs (Independent Software Vendors) sentem frequentemente necessidade de incluir nas suas aplicações uma funcionalidade de exportação de informação - uma carta, uma tabela com dados financeiros, um gráfico, etc - para que possa ser trabalhada externamente com ferramentas ditas de Produtividade num 'desktop' (também designadas por 'Suites de Office'). Nessas situações são confrontados com a necessidade de elegerem que formato deve ser usado para essa exportação de dados, sendo a escolha mais usual a utilização dos formatos do Microsoft Office. Contudo, se fôr essa a sua única opção, estarão a auto excluir-se de um mercado em crescimento constituído pelos clientes que utilizam outras ferramentas de produtividade, nomeadamente as que são baseadas no standard ISO Open Document Format (ODF), como é o caso do Open Office. Este seminário tem por objectivo dar aos parceiros ISVs da Oracle: Uma visão sobre o mercado actual de 'suites' de Office e dos standards usados pelos principais fornecedores de soluções A estratégia da Oracle para o Open Office Razões para deverem suportar a norma ODF Como suportar ODF nas suas aplicações Agenda O mercado actual das Suites Office Os standards actuais "de facto" e oficiais - MS-Office, OOXML e ODF Que produtos usam o ODF hoje Estratégia Oracle para o Open Office Porquê suportar ODF nas aplicações Como adaptar as aplicações actuais à utilização de ODF Local: Oracle - Lagoas ParkData: 16 de DezembroDuração: 1/2 diaHorário: 9:30 - 12:00 Inscrições: Email, ou pelo telefone 211929708 Para mais informações, por favor contacte Claudia Costa via Email ou telefone 214235027.

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  • Which Open Source Licenses can address concerns for an Open Source Game Engine?

    - by Chris
    I am on a team that is looking to open source an engine we are building. It's intended as an engine for Online RPG style games. We're writing it to work on both desktops and android platforms. I've been over to the OSI http://opensource.org/licenses/category to check out the most common licenses. However, this will be my first time going into an open source project and I wanted to know if the community had some insight into which licenses might be best suited. Key licensing concerns: Removing or limiting our liability (most already seem to cover this, but stating for completeness). We want other developers to be able to take part or all of our project and use it in their own projects with proper accreditation to our project. Licensing should not hinder someone's ability to quickly use the engine. They should be able to download a release and start using it without needing to wait on licensing issues. Game content (gfx, sound, etc.) that is not part of the engine should be allowed to be licensed separately. If someone is using our engine, they can retain full copy right of their content, including engine generated data. Our primary goal is exposure, which is why we're going open source to start with. Both for the project and for the individuals developing it. Are there any licenses that can require accreditation visible to players? While I'd put our primary goal as exposure, for licensing the accreditation is less of a concern. From what I've read through (and have been able to understand) it doesn't seem like any of the licenses cover anything that is produced by the licensed software. Are there any that state this specifically, or does simply not mentioning it leave it open for other licensing? Are there any other concerns that we should consider? Has anyone had any issues using any of these licenses?

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  • proxychained browser unable to open files

    - by Cocoro Cara
    Ubuntu 10.10, Midori 0.3.2 browser (same problem with Epiphany 2.30.2, Chrome 11.0.686.1 dev; haven't tried with Firefox as yet) Proxychains-3.1 installed, working fine. Here is the deal: when NOT proxychained, Midori or Epiphany can download and open a file (e.g. PDFs from a Google search) in Evince without problem. But when proxychained, neither browser can open PDF files. The message is, "file xxx downloaded". Then it tries to open the file, an indication appears in the status bar, the turning wheel appears, and then nothing. Evince doesn't open. Whats going on here? In both cases (with and without proxychains) files are downloaded to the /tmp folder. They have the same file permissions and ownership. Whats different when proxychained? Why can't the files be opened and why are there no error messages or notifications. Why the silent failure? I don't want to use FF or Chrome. Chrome does not follow my GTK2 customizations and FF is just too resource heavy. Please help.

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  • How to set up the CNAME in DNS zone record to work with Unbounce

    - by Lirik
    I'm trying to run split testing on some landing pages I "designed" with Unbounce, but it requires that I set the CNAME record for my domain/sub-domain and I'm having trouble figuring out what is the right way to do it. My host is arvixe (www.arvixe.com) and their customer support has failed to help me for the past 5 days (I spoke to them multiple times). I followed the directions for setting the CNAME record and I was able to set the CNAME record, but I'm consistently unable to verify that the CNAME record is set up correctly. I followed the instructions on Unbounce to verify the CNAME record for my sub-domain (beta.devboost.com) and here are the results: No records found reverse lookup smtp diag port scan blacklist Reported by ns1.SNARE.arvixe.com on Thursday, November 10, 2011 at 5:49:57 PM (GMT-6) Here is my DNS zone record from the control panel of my host (last record, CNAME unbouncepages.com): Is there something wrong with my DNS Zone Record? What's the right way to do this? Update: I also have a CNAME record for beta in my root domain (devboost.com): I've updated my sub-domain record now: I've removed most of the other DNS records and I've removed the beta label for the CNAME record: Is that correct? Is there anything else I need to do?

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  • Bypassing Router's DNS Settings

    - by Ramon Marco Navarro
    Is there a way to bypass my ISP provided CPE/router's DNS settings? I'd like to use OpenDNS but I am unable to access the administrator acount of the CPE. I tried logging in using the default passwords (admin/admin, admin/1234, etc) to no avail. I found out later that the admin password is generated using a generator where you input the CPE's MAC address. I tried emailing the manufacturer of the CPE (Huawei, the CPE is Huawei BM625) and my ISP but they aren't replying. I also saw similar queries (lots of them!) at Huawei's forums, without a single reply. So as a last resort, I'd like to know a way to bypass the CPE's DNS settings. My subscription is for a WiMAX service. I'm using Windows 7 and have already set the DNS settings for the Local Area Connection. But I still am not seeing the "You are already using OpenDNS" text at OpenDNS's site. And when explicitly using the OpenDNS servers I still seem to get 208.69.38.150 rather than the expected 208.69.38.160: nslookup www.opendns.com. 208.67.222.222 Server: resolver1.opendns.com Address: 208.67.222.222 Non-authoritative answer: Name: www.opendns.com Address: 208.69.38.150

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  • Per client DNS server assignment using Pfsense

    - by Trix
    I have a network where pfsense is the gateway. There are two sets of clients that I want. One where there will be some restrictions to the network (example, IM being blocked) and one network where there are no restrictions. One easy way I thought about doing this was assigning the different domains different DNS servers. One set could use OpenDNS, the other could use Google's Public DNS. The set with OpenDNS would have the filter options on (using OpenDNS' dashboard, I can check block IM .... so I do not manually need to block login.oscar.aol.com, meebo.com, gmail chat ....etc). So the problem is the DHCP server looks like it will only assign a single set of DNS servers to clients. Is there a way to set a per client assignment? Is there a better way to obtain what I want to obtain. This is just a small home network. I do not need anything fancy, but I do need this functionality in one way or another.

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  • Multiple authoritative DNS server on same IPv4 address

    - by Adrien Clerc
    I'd like to maintain a DNS tunnel on my self-hosted server at example.com. I also have a DNS server on it, which serves everything for example.com. I'm currently using dns2tcp for DNS tunneling, on the domain tunnel.example.com. NSD3 is used for serving authoritative zones, because it is both simple and secure. However, I have only one public IPv4 address, which means that NSD and dns2tcp can't listen on the same IP/port. So I'm currently using PowerDNS Recursor using the forward-zones parameter like this: forward-zones-recurse=tunnel.example.com=1.2.3.4:5354 forward-zones=example.com=1.2.3.4:5353 This enables request for authoritative zone to be asked to the correct server, as well as for tunnel requests. NSD is listening on port 5353 and dns2tcp on port 5354. However, this is bad, because the recursor needs to be open. And it actually answers to any recursive query. Do you have any solution for that? I really prefer a solution that doesn't involve setting up BIND, but if you are in the mood to convince me, don't hesitate to do so ;) EDIT: I change the title to be clearer.

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  • Possible DNS issue?

    - by durilai
    I am having an issue, which I think stems from DNS. I have 2 servers. Server 1 is AD server with DNS, which was automatically configured when installing AD. The second server is a web server that is part of the domain, but it is not AD nor any other role. I can remote desktop in from server 1 using internal IP address, but when I attempt to connect from any other computer it fails, the computer can connect to server 1. I am able to ping both servers, as well as nslookup both using their FQDN. I am also able to telnet to port 3389. Any help is appreciated UPDATE I do not think it is DNS anymore, but not sure what it is. The remote desktop connects and I get to the login prompt, but when I start to enter credentials it disconnects. I then am unable to reconnect. If I wait for about 10 minutes it will allow me to repeat, but with the same results. UGH!!!

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  • SQL Server Analysis Services, DNS, AD, Kerberos, Connection Issues

    - by ScaleOvenStove
    Running into a very weird issue. Converting servers to Windows 2008/SQL 2008. Have a server, SERVER_A, brand new, setup with Win2k8,Sql2k8 - works. Have a Server SERVER_B, running Windows2003/SQL2005. I want to migrate from SERVER_B to SERVER_A. I have all db's, cubes, etc setup on SERVER_A and it is mimicking functionality. Since users are using Excel to connect to SSAS, they connection string has SERVER_B in it. What I want to do, is, change DNS on the network to point SERVER_B (by name) at the ip of SERVER_A. I have successfully done this with another server, SERVER_C, but I need to do it with SERVER_B. What I have found is that with SERVER_C, after changing DNS, had to remove SERVER_C from AD and then it worked. I could connect to SERVER_C (DB), SERVER_C (SSAS Default Instance) and SERVER_C (SSAS Named instance) and it all was actually connecting to SERVER_A I tried to do the same with with SERVER_B, and no luck. Changed DNS, removed from AD, and it wouldn't connect. Found out that there were some SPN's in AD set up, so removed those and tried again. I then could connect to SERVER_B (DB), SERVER_B (SSAS Named Instance), but not SERVER_B (SSAS Default Instance). I could connect to SERVER_B (SSAS Default Intance WITH the Port #), but I need to be able to connect without the port number. I am at a loss to as why I can't connect to the default instance without a port #. Not sure if it is SPN's in AD, or another AD issue, or something else. Pretty sure it isnt something on the server (because SERVER_C works!) Any insight or suggestions would be greatly helpful!!

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  • DNS to \\Server\ wrong - \\Server.company.local\ works fine

    - by JimmyClif
    I had a little network glitch and since then one of my servers shows up wrong at some workstations when typing in \\server\. Example: On workstationA I go to Explorer and and type \\server\ and it brings me to our copier at 192.168.2.101. \\server.company.local\ gets me to the right place at 192.168.2.252. Ping with server pings 192.168.2.252 - same correct result with ping server.company.com nslookup also shows correct result with both. reverse lookup by ip is correct also. I flush the DNS on the workstation and the error still occurs. reboot same result. At that point I give up and start remapping the shares to \\server.company.local\share just to get the user back working... DNS Server has correct entries for that server. Can access the server via \\server\ on dns server, all looks fine. Eventually the workstation figures it out by itself and \\server\ works again but my life wouldn't be as stressful if I had a clue what happened or how to fix it myself. Thanks for your time looking and answering.

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  • PTR and A record must match?

    - by somecallmemike
    RFC 1912 Section 2.1 states the following: Make sure your PTR and A records match. For every IP address, there should be a matching PTR record in the in-addr.arpa domain. If a host is multi-homed, (more than one IP address) make sure that all IP addresses have a corresponding PTR record (not just the first one). Failure to have matching PTR and A records can cause loss of Internet services similar to not being registered in the DNS at all. Also, PTR records must point back to a valid A record, not a alias defined by a CNAME. It is highly recommended that you use some software which automates this checking, or generate your DNS data from a database which automatically creates consistent data. This does not make any sense to me, should an ISP keep matching A records for every PTR record? It seems to me that it's only important if the IP address that the PTR record describes is hosting a service that is sensitive to DNS being mismatched (such as email hosting). In that case the forward zone would be configured under a domain name (examples follow the format 'zone - record'): domain.tld -> mail IN A 1.2.3.4 And the PTR record would be configured to match: 3.2.1.in-addr.arpa -> 4 IN PTR mail.domain.tld. Would there be any reason for the ISP to host a forward lookup for an IP address on their network like this?: ispdomain.tld -> broadband-ip-1 IN A 1.2.3.4

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  • Joining new DC to AD - DNS name does not exist

    - by Andrew Connell
    I had a DC fail on me recently and trying to add a new one to my domain, although I'm sensing I might have other issues in my domain. I'm a dev at heart and know just enough about AD to be dangerous so looking for some assistance. My working DC is RIVERCITY-DC12. I'm trying to promote RIVERCITY-DC14 as a DC to the RIVERCITY domain, but when I run DCPROMO, at the NETWORK CREDENTIALS step where I point to the name of the domain (rivercity.local), I get "An AD DC for the domain rivercity.local cannot be contacted" and in the details see "The error was DNS name does not exist" Looking at RIVERCITY-DC12, I can see DNS is working, I've been able to query it from other machines in my domain, and no errors are reported in the DNS category within the Event Viewer. When I checked the FMSO roles, it shows RIVERCITY-DC12 is the machine for all listed roles. Not sure what I should do next or how to troubleshoot/investigate after searching around for a solution... ideas? Environment: Domain: rivercity (rivercity.local) Forest functional level: Windows 2000 (I'm more than happy to raise this) Windows Server 2008 All servers are Windows Server 2008 R2 SP1 (fully patched)

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