DNS stands for the Domain Name System, a hierarchical, distributed database where the keys are domain names.

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Finding BIND Queries Per Month

I need to find out the number of queries that my BIND server is handling a month. I have dumped the stats out to named.stats, but I am having problems understanding it. How can I find out what time ...
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67 views

Pinging server replies back with incorrect IP address

I hope this is the correct forum for this posting. Here's my environment (well, my clients environment): Gateway: 10.0.0.1 (our router) AD & DNS Server: 10.0.0.8 (Windows 2008 R2) (host name: ...
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1answer
78 views

How to use nginx with coreos docker containers and fleet

I have three docker containers configured.. ghost - a custom docker container which runs my ghost blog ghost-data - docker container which holds all the persistent data.. content/* config.js, ...
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0answers
7 views

OSX Yosemite periodically loses DNS info for my server [migrated]

I'm running OSX Yosemite as my development machine. I run a VPS for the product I'm developing at cursiveclojure.com. Every so often (3 times now over the last month or so) my Mac somehow gets into a ...
2
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2answers
142 views

Colossal Failure After Domain Rename

The backstory... I recently upgraded a MS Server from 03 to 2012. The server needed to be a domain controller and for simplicities sake I named it foo.com instead of naming it something different ...
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1answer
84 views

Allow OpenVPN client to push it's own DNS servers, regardless of OpenVPN server's pushed dns?

There is an OpenVPN server running on a Debian and it pushes a DNS in the server config file: push "dhcp-option DNS 8.8.8.8" Is there an option to allow the users to change that DNS servers on the ...
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0answers
23 views

What ports need to be open for dnscmd.exe to operate?

I'm currently working with the Microsoft DNS command line utility dnscmd.exe to automate DNS record deletion in our datacenter. To complete this automation I need to be able to access a domain ...
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0answers
15 views

BIND Delegation to primary AD site only [closed]

First-question, be nice please. On a physically distributed internal network we have BIND running our top level DNS at our primary site, with Active Directory serving a single subdomain locally AND ...
4
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1answer
75 views

DNS and PING failure - Windows 2003 DNS and SonicWall NSA240

I am hoping someone can shed some light on this one... I have two Windows 2003 DC's - both running DNS, there are several Windows 2008 R2 and one Windows 2012 Standard server running as member ...
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0answers
60 views

WinServer 2012 DC with 2 IPs on one NIC - DNS and other Problems

I have a Windows Server 2012 Domain Controller which is also temprarily running an SQL Server. For not having to change the SQL Server IP in all the clients I assigned its former IP to the DC as the ...
2
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2answers
115 views

Do I need to Set-up PTR record in SPF Setting?

I have set-up the RDNS from my hosting provider for the ip address to resolve to "maximus.example.com". After that, do I also need to add the PTR records to the SPF Text details in my DNS zone file as ...
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39 views

kinit won't connect to samba4 domain controller, cannot resolve hostname

i have set up a domain controller on my virtual machine. At first i will post all important configs, so you know what works already. Hostname: affenhirn2 Domain Name: example.affenhirn2.local (i am ...
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1answer
51 views

Sending mail from AWS

I was hosting my domain on another server and also using the email of a 3rd party service. I just moved my domain to AWS and it works well now (DNS propogation etc.) I also changed the MX Records ...
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0answers
13 views

Windows 7 Intranet Web Service Name Resolution [migrated]

I am running a Windows 7 X64 HP laptop that has two users configured, one for my wife and one for myself. I also run a Microsoft 2003 web server providing access to three web sites, ...
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0answers
34 views

Vagrant DNS resolver and proxy

I have a couple of Vagrant boxes using Puppet provisioning and custom made Vagrantfile. They're all fine however with my custom WordPress box I've found serving pages takes about 20-30 secs! After ...
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4answers
828 views

Reverse DNS Lookups

Morning All, I've been handed a domain with c.150k DNS records in it for a total of 100k machines. The DNS records are all in a single forward lookup zone on the same domain and just to be helpful, ...
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1answer
47 views

Name servers not resolved leading to DNS lookup failure

So it's difficult to give a short title to this but I'll go over a brief back story... So I have the domain repo-itechy21.tk and have hosting with 000webhost. (ew) it's been a good 30 hours and my ...
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1answer
15 views

DNSSEC key-file not found

This is actually a follow-up on my previous question (my problem was solved) it can be found here: DNSSEC sign-zone results in fatal failure However, I still want to use dnssec-signzone when creating ...
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2answers
50 views

I can't recive emails and all outgoing emails go to spam folder

I recently bought a VPS server at OVH.com to host the web of one of our business and I'm having problems to correctly configure the DNS to be able to send and recive emails. Right now i can't send ...
1
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1answer
70 views

CoreOS Cluster DNS setup

I'm unsure of how to setup DNS for a coreos cluster. Currently I have all of my api instances behind a haproxy load balancer and a DNS A record which points to the (elastic) ip of the load balancer. ...
3
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1answer
66 views

Somebody created subdomain without my knowledge. How? [duplicate]

Got an interesting email from CIRA today with: CE14-12545 [Malware hosted on ygglhalayvtwy.khabarov[.]ca] URL: http://ygglhalayvtwy.khabarov[.]ca/xnor/orladjaup.jpg IP: 204[.]44[.]87[.]184 MD5: ...
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0answers
24 views

How are Authoritative Name Servers' IPs resolved [duplicate]

I realized I don't understand a pretty basic thing about DNS. So, here's the flow Assuming nothing is cached, When I open stackoverflow.com, the request goes to the root, then to the .com TLD ...
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1answer
182 views

GMail bouncing mail sent over IPv6, IPv4 working

I have trouble sending email to GMail addresses using IPv6 from my domain camgirltools.net If IPv4 is used, everything works as intended, the mail is delivered. When using IPv6 to send mail to GMail ...
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1answer
67 views

OpenVPN + DNScrypt

I'm using Debian 7 Wheezy. I've installed OpenVPN using this awesome, fully automated script: wget https://raw.github.com/cwaffles/ezopenvpn/master/ezopenvpn.sh --no-check-certificate -O ezopenvpn.sh ...
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1answer
31 views

Access domain from internal network [closed]

I have a domain, example.com and it has a A record pointing to my external IP. Port 80 is forwarded to my server. However, when I try to access it from inside the local network (behind the external ...
0
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1answer
25 views

DNSSEC sign-zone results in fatal failure

I have a working DNS in a VM-env for testing and learning purposes. It's a complete server from root-domain and a couple of subdomains. I've added dnssec-enable yes; into named.conf, and also ...
2
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1answer
90 views

How do I request a DNS flush on a remote recursive resolver from command line? [closed]

I recently updated a domain mapping for my domain but the TTL was several days and I'd like my local recursive resolver (a remote machine, not localhost) to update its cache. How can I send a ...
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1answer
86 views

DigitalOcean DNS or my computer returning ERR_NAME_NOT_RESOLVED for my website domain

Two people (me - the webmaster - and a regular user, for now) that accessed our site www.lastroarte.com are having ERR_NAME_NOT_RESOLVED error on Chrome and any other browsers are just not finding ...
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34 views

Is it Safe to “Disable Recursion (also disables forwarders)” in a Standalone Lab?

In a standalone lab is it safe / appropriate to "Disable Recursion (also disables forwarders)"? (With recursion disabled, Microsoft Best Practices Analyzer reports, "The DNS Server must have root ...
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0answers
31 views

Ngrok custom hostname add cname to subdomain

I have xyzfoo.com domain. I created a DNS CNAME record which points to ngrok.com I have my app running locally on http://127.0.0.1:5000/ but not running remotely on zyxfoo.com Does a subdomain need ...
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1answer
70 views

Iptables block connection from specific IP - to another IP [closed]

My server with dnsmasq will send Facebook.com (for example) to DNS 8.8.8.8. All other websites go trough another dns server. When i use:sudo iptables -A INPUT -p udp -s 8.8.8.8 --sport 53 -j DROP With ...
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0answers
101 views

Multiple Domains Name on one server with Nginx

I'm struggling to configure two different domains name on my dedicated server... I've already one DN configured like this in the vhost DOMAIN_1.net.conf : server { listen 127.0.0.1:8080; ...
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1answer
44 views

Puppet Master attempts to resolve agent hostname

Running puppet agent -t from a non-dns resolvable client dumps out the following from a puppet master running in verbose mode: Error: Could not resolve 10.110.x.xx: no name for 10.110.x.xx (Where ...
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2answers
33 views

Does an MX DNS Record Sub-Domain need to exist as another DNS Record?

I am trying to setup a mail server on my Ubuntu server. In setting up the DNS MX Record for the mail server I am confused. I have added an MX record for mail.domain.com simply because it is the ...
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1answer
61 views

Clearing out Barracuda 310 web filter DNS/site cache?

On my network I have a Barracuda 310 web filter installed. After an issue with our ISP suddenly interrupting our DNS service, we switched over to a more reliable DNS on all of our systems. ...
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1answer
177 views

450 4.7.1 Client host rejected: cannot find your hostname

I have a Postfix/Dovecot email server which fails to deliver emails to some addresses. Here's an example of what is says: <xxxxx@board.com.ua>: host mail.da.net.ua[91.213.154.4] said: 450 4.7.1 ...
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1answer
26 views

Windows Azure linux domain

I've set up a Virtual Machine and I need to connect my domain .site.com to Windows Azure, I tried to do it with an A record using the provided IP, but the VIP address is not static, and after ...
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2answers
118 views

Changing an `A` record to a `CNAME` without downtime

I have a domain name (currently hosted on dyn.com) with an A record pointing to our production IP address. We're moving across to Amazon EC2 and are using a load balancer, with the recommendation ...
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votes
1answer
47 views

Bypass primary DNS for one domain

I need to use my default DNS as primary, but for second I could use Google's one which is already updated. I would like to use Google's DNS for a specific domain which has changed IP and is still ...
2
votes
1answer
73 views

Is it possible to set a PTR record for Github Pages hosting?

Icelandic domains (.is) require that their domains support reverse DNS, which means configuring PTR records on the hosting server. Is it possible to set up a PTR record for GitHub Pages site hosting? ...
2
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0answers
53 views

Is it at all commonplace to make service available via the same host as its redundancy, just different ports? [closed]

I am writing software that allows for the configuration of parameters for authentication with a Primary and Secondary RADIUS server. Server administrators, in your experience, is it common or not for ...
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0answers
93 views

Any suggestions on why DNS is failing over DrayTek 2820?

In recent weeks a weird problem has started in my office. The internet seems to stop working, but it has not failed, it's just DNS problems. Setup: ADSL2+ AnnexM connection via a Draytek Vigor 2820 ...
2
votes
1answer
108 views

named can not find a certain domain

I have setup named in chroot and it has been working for some days. Now it does not find a certain domain's IP: # dig arstechnica.com ; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.30.rc1.el6_6.1 ...
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0answers
31 views

No RRSIGs found

I had a dnssec expiration and since redoing everything, I get the following error No RRSIGs found from verisign debugging These are the exact steps I use to produce the key and signatures. What ...
2
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1answer
42 views

Multiple MX records pointing to multiple servers for a single domain

Is it possible to have multiple MX records pointing to multiple mail servers for a single domain? Must all mail accounts be identical on each of those servers, or is it possible to have ...
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4answers
326 views

How much time does it take for new A-records to start working?

I created a subdomain pointing to another IP address with an A-record about two hours ago. When I try to ping, like pinging from different locations (using online services), I get Unknown host:. The ...
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2answers
121 views

504 gateway timeout when accessing by hostname, but not by IP

I'm using Amazon EC2 with Elastic Load Balancing. On my web-based application, end-users connect to app.myapp.com get a 504 gateway timeout error when performing certain operations like converting a ...
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0answers
18 views

Windows SBS 2008 - Registering remote VPN users in DNS

Our server runs Windows SBS 2008 and we're utilising Routing and Remote Access for VPN connectivity. Some of our remote VPN users have workstations which are attached to our domain. When these users ...
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0answers
61 views

Inconsistent DNS resolution behavior (dns_probe_finished_nxdomain)

I have a LAN with a windows server 2012 DC configured with DNS and DHCP. On occasion, clients will receive a dns_probe_finished_nxdomain error when browsing the web. This is not a consistent problem. ...
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0answers
40 views

GNU-Mailman, MS Exchange, and SPF

We are currently in the process of setting up GNU-Mailman to handle our customer mailing list. We have remote hosting (Hostgator Business Plan) for our website and for the GNU-Mailman install and we ...