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

learn more… | top users | synonyms

0
votes
0answers
11 views

Possible Complications When Windows Domain Name is the Same as a Web Domain

Are there going to be complications if a new Windows Domain Controller creates a new domain with the same name as an active domain online? Will this cause significant problems when trying to access ...
-2
votes
1answer
35 views

Iptables block connection from specific IP - to another IP [on hold]

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 ...
0
votes
2answers
915 views

Windows DNS on SBS 2011: How to push Alternate DNS Server

are windows SBS is starting to go and when it does all the clients in our office loose dns settings and then as a result can not get out to the internet for services they need as a temporary measure ...
0
votes
0answers
61 views

Why is this DNS answer not accepted? [on hold]

I have 6 entities: 1 Client 1 Resolver 3 DNS Server (root, '.com' and 'example.com') 1 malicious DNS Server for 'example.com', unknown from the others. Lets call this server DNS4. The Client ...
0
votes
1answer
211 views

Foreman DNS Error ERF12-2357 [ProxyAPI::ProxyException]: Unable to set DNS entry

after setting up the foreman enviroment I'm getting the error: "Unable to save Create Reverse DNS record for mydomain.de task failed with the following error: ERF12-2357 [ProxyAPI::ProxyException]: ...
2
votes
1answer
76 views

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

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 ...
2
votes
1answer
984 views

Mac OSX Server 10.6 DNS Issues

The server was upgraded from 10.5 from 10.6, during the upgrade the Reverse Zones were lost so I tried to recreate these but found that it's best to delete all zones, definitions and start again. So ...
0
votes
2answers
986 views

Sender address rejected (mx record not found)

I am using both Exim and Office 365 to send email - the server sends automated mails from an application using Exim and Office 365 handles day to day user and incoming email etc. I am getting some ...
0
votes
1answer
21 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 ...
0
votes
2answers
800 views

How DNS queries are forwarded in a Windows Workgroup network

Situation: 20 computers in the same windows workgroup. They are connected with some switches. Then there is router and a firewall (2 separate hardware, but I don't know how they are connected) with ...
-1
votes
1answer
809 views

DNS resolve issue - private DNS and public DNS [on hold]

OS : Windows 7 Network properties : DHCP and obtain DNS automatically In office network, local IP address : 208. *. *. * DNS (which is chosen automatically based on above mentioned setting) : 208. ...
0
votes
0answers
30 views

Why domain always puts port at the end of URL [on hold]

I've got a box running on Nitrous.io that has a wordpress installation on it in the /workspace/www/ directory and in the box settings I've typed in my domain that I would like the box to resolve to in ...
0
votes
2answers
828 views

AWS VPC External DNS issue

I have booted up an instance in side a private VPC. I assigned an ElasticIp address to it and I can ssh into the instance with no issues. However, DNS is not resolving :( in my /etc/resolv.conf I ...
0
votes
0answers
22 views

Reverse DNS Zone not working properly BIND9 [migrated]

I am using the 10.0.0.x scheme for my LAN. I have a Raspberry Pi that hosts certain services, including DNS. I am running into a problem with what I think is my reverse zone. The RPI is on ...
0
votes
1answer
933 views

dig succeeds, nslookup fails (with dnsmasq as the server)

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 ...
1
vote
3answers
3k views

Unable to resolve FQDN, hostname works

We are having an issue where computers who are not part of the domain cannot resolve the FQDN of a server (but regular hostname and ip do resolve). The strange thing is that this does work when the ...
0
votes
1answer
2k views

Dynamic DNS registration for VPN clients

I've got a VPN server set up in my Active Directory on a remote network. (VPN Server is separate box from DNS/AD) When I dial into the network (client machine is not a member of the AD) the machine ...
0
votes
1answer
31 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 ...
0
votes
0answers
18 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 ...
0
votes
0answers
3 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 ...
23
votes
8answers
2k views

What's the maximum number of IPs a DNS A record can have?

I have a strange idea - let multiple people/organizations host the same application, and let all their nodes be accessible via a single domain name. That's in order to have, let's say, a really ...
1
vote
1answer
29 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. ...
2
votes
0answers
41 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; ...
2
votes
2answers
384 views

Can I configure resolv.conf to use a specific nameserver for a domain?

Can I configure resolv.conf to use a specific nameserver for a domain? e.g.: nameserver internal.thekelleys.org.uk 192.168.1.1 nameserver 192.168.0.1 I don't want to list *.test.com in /etc/hosts; ...
0
votes
2answers
27 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 ...
1
vote
2answers
72 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 ...
0
votes
0answers
38 views

Oracle GNS (Grid Naming Service) Breaks DNS

Am running a 2-node Oracle 12.1.0.2.0 ASM Flex Cluster using Oracle GNS which I believe uses zeroconf to create it's adhoc network. Before GNS starts, DNS works, i.e. nslookup, dig, ping, ssh all ...
-1
votes
0answers
28 views

dns config for nat with BIND [on hold]

Over the past days, i installed CentOS on a computer that I'm using to mess around with system admin related tasks. What im doing is, I'm basically making this computer into a "super router" as i like ...
2
votes
1answer
65 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? ...
1
vote
1answer
27 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 ...
0
votes
0answers
13 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 ...
-1
votes
0answers
4 views

cant ping specific device [migrated]

i have these nodes on the same network Sasmung GT-S5300 192.168.12.38 Asus Zenfone 5 192.168.12.37 pc(windows 7) 192.168.12.36 i tried to access my pc with my samsung through web browser, and ...
2
votes
1answer
4k views

UnKnown can't find <hostname>: Non-existent domain

I have a small network running Windows Server 2012 servers and Windows 7 clients. Right now I'm trying to setup DNS with an AD-Integrated Zone. I've configured my local machine, which is not a domain ...
2
votes
2answers
101 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 ...
-2
votes
1answer
37 views

wrong info shown in intodns.com [on hold]

I have a web hosting website (the main domain is hosted on a cPanel server) I have set some DNS records for ns11, ns12.myhosting.com at both places possible: cPanel in Advanced DNS Zone Editor, and ...
2
votes
0answers
46 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 ...
-1
votes
1answer
39 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 ...
3
votes
2answers
56 views

Best CNAME TTL strategy for fallover switching

I've recently been thinking about the TTL of our DNS. We have A records for our servers and then CNAME records for the customer facing names. The www.example.com CNAME points to server-01.example.com ...
2
votes
1answer
94 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 ...
0
votes
0answers
36 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 ...
-1
votes
1answer
19 views

Error Message from DnsResolver.pm after removing IPv6

After removing IPv6 (to get KVM working) from /etc/network/interfaces, I'm getting lately the following error: error creating a DNS resolver socket: Network is unreachable at ...
18
votes
7answers
37k views

Can you lookup a domains past nameserver & mx record history?

If is possible to find out which nameservers a domain was previously pointing too? I need to try and find where a domain was previously hosted so that I can try and gain access to an old hosted email ...
2
votes
2answers
1k views

BIND 9.9.3 slave updates: received notify for zone 'domain': not authoritative

I am having problems with getting a zone loaded properly on a slave DNS server. Both servers are running BIND 9.9.3-P2. I am already serving ~150 zones and they are all working properly. However when ...
0
votes
1answer
1k views

Can't resolve local IP using remote dns server

I'm trying to do something I thought would be pretty simple. Mapping local.mydomain.com to 192.168.0.1 using my registrar's DNS server.(namecheap.com) I've added an A Record for local with value of ...
0
votes
4answers
314 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 ...
3
votes
1answer
1k views

samba_dnsupdate dns_tkey_negotiategss: TKEY is unacceptable

I'm trying to configurate dinamic update to bind I have samba4.0.0rc5 running with bind 9.8 on Ubuntu 12.04. by default the provision command dont create necesary dns.keytab. i've tested with the ...
0
votes
1answer
1k views

Pageok given by puppet instead of subdomain files hosted on godaddy

I'm managing the e-commerce website for a retail store in Los Angeles, and use a subdomain hosted on GoDaddy as a fileserver to augment our Online Webstore CMS, which won't take large files (and ...
1
vote
0answers
17 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
votes
1answer
29 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 ...
2
votes
2answers
7k views

Squid throws error, The requested URL could not be retrieved

Sometimes I am getting the following error The requested URL could not be retrieved While trying to retrieve the URL: http://groups.google.com/ The following error was encountered: Unable to ...