An A record is a type of DNS record that maps a name to an IP address. For example, the A record for serverfault.com is 64.34.119.12

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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
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1answer
55 views

How do I get all IPs that a single Amazon Route 53 A Record entry is pointing to?

I am using Amazon's Route 53 to set up zones for a domain. I have multiple A Records set up as an Alias to a bunch of targets. These aliases have a Weighted routing policy. They look something as ...
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2answers
37 views

Having a lot of difficulty using CNAME and A records with Elastic Beanstalk to redirect non-www to www

I have my website up with Elastic Beanstalk (as a VirtualHost): http://apptic.us-east-1.elasticbeanstalk.com/apptic/ I also have my domain at Namecheap: apptic.me I've installed an SSL certificate ...
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0answers
15 views

How to add a subdomain in DNSimple

I have registered a domain with DNSimple. I want to add a subdomain (mg.mydomain.com) to send emails using MailGun. DNSimple says I need to add an "A" record. ...
0
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2answers
43 views

How to correctly setup a CNAME / A Record when pointing to an Azure VM?

I have a web app hosted in Azure, which gives me a "custom" domain that is awesomeapp.cloudapp.net, and in the settings I can see the IP address: 123.456.789 We have a domain www.awesomeapp.com that ...
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2answers
27 views

Direct A Record to alternate IP if primary does not resolve?

Is it possible to configure an A record to point to multiple addresses? For example: website.abcd.com -> 1.1.1.1 website.abcd.com -> 2.2.2.2 So that if 1.1.1.1 is down, it will direct traffic to ...
3
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1answer
90 views

Best practices for managing the IP addresses you own in DNS and their PTRs?

I was wondering how exactly the big companies go about managing all the IP addresses that their public servers use, especially in respect to setting up correct PTR-records. This is very important, ...
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1answer
1k views

Setting alias for DynDNS domain

I've created DynDNS domain for testing my local sites, and i'm having trouble with pointing to root domain. From my registrar (GoDaddy) I've created a CNAME for www to point my example.dyndns.com so ...
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1answer
25 views

Route 53 A name record to EC2 instance not working

I have an issue with my ec2 instance hosted on AWS. The EC2 instance has an associated Elastic ip address that I can access and confirmed is working (SSHing into the instance and changing the base ...
2
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1answer
62 views

Wildcard CNAME DNS records overriding specific A DNS records on one provider

Ran into a weird issue where a wildcard CNAME record (i.e. *.example.com) was overriding specific A records (i.e. host1.example.com, host2.example.com). It only affected Verizon Wireless's ...
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5answers
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How to redirect domain A to domain B using A-Records and CNAME records only

I have 2 domains hosted with different hosts. I need to redirect Domain A to Domain B. Unfortunately I can't do a 301 redirect from Host A, but can only modify/add DNS entries (A-Records and CNAMEs) ...
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1answer
1k views

Should I create a second WAN Interface for a new SSLVPN setup on my Sonicwall 2400?

Sonic Wall 2400 I'm setting up a new SSLVPN on our Sonicwall, very new to this. I currently have an exchange server as well, so mail.company.com is directed to our mail server. I'd like to setup a ...
32
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3answers
2k views

Can someone using the same DNS server as me hijack my domains?

When I register a new domain, I send it to my hosting provider by assigning it its domain name servers in the registar's settings. For example, with Digital Ocean, I input the following: ...
0
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2answers
85 views

A records and CNAME records

I have a question about A records and cname records. Some info, we have our domain registered at Networksolutions.com, the domain name for example is company.com. We have two webserver and on those ...
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3answers
28 views

Point subdomain to different host but maintain vanity URL

I am creating a single page of an existing website for a client but they have requested that I host it on my own account and they can "point to it" from their host. They want to keep their URL in the ...
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1answer
601 views

Is it possible to specify a fallback A record for a subdomain that isn't otherwise accounted for?

My current DNS configuration has the blank hostname as well as www going to the VPS's IP address, and they're being served up fine. mail has a CNAME that goes to Google Apps for convenience purposes. ...
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1answer
23 views

Is it okay (or even recommended for performance) to point mobile subdomain A record to different IP?

Is it okay or recommended for performance/load balancing to point the A Record for your mobile subdomain to a separate server, with its own IP address?
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2answers
106 views

Is a CNAME sufficient for a www. record?

I have been doing a server migration, and checking that everything related to DNS is configured correctly by using IntoDNS. After doing this though, it flags up a error saying that there is no A ...
0
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1answer
80 views

Subdomain resolving to 2 different IP addresses (one unknown)

I have a domain registered with Fasthosts (animesoc.co.uk). I've recently hosted a forum on an external server (with IP address 51.254.128.170), and pointed the subdomain http://forums.animesoc.co.uk/ ...
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1answer
65 views

DNS record for staging site

I want to set up a dns record for our staging site which is on a different server. Say if our domain is www.example.com can I simply create a new A record for www.staging.example.com pointing to a ...
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1answer
84 views

Another unknown domain added A record of my IP

I have a domain on GoDaddy and a VPS on DigitalOcean (Ubuntu 14.04 with nginx if that helps). Today I noticed that an unknown domain has added A record pointing to my IP Address on DigitalOcean. All ...
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1answer
37 views

Changing DNS records when Moving a site

I'm building a new Magento website on a Amazon ec2 instance and will need to point domain of their old OSCommerce site to the new ec2 instance's elastic IP address. Normally I would have though this ...
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1answer
57 views

Redirect domain and all the subdomains to a certain sub domain

I am building a site for the alumni association of my school. I have bought a domain myschool.com from GoDaddy. In GoDaddy, I have customised DigitalOcean as name servers. I would like to customise ...
2
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1answer
82 views

Domain A record on active directory controller

Currently we have an Active Directory setup for a small network running on Debian 8 and Samba 4. At one point we had to change the ip address of the AD server from 100.0.0.4 to 100.0.0.100. I edited: ...
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98 views

DNS round-robin requests not distributed evenly

We have setup two DNS A records, where each points to a load balancer. nslookup ourdomain.com Server: 8.8.8.8 Address: 8.8.8.8#53 Non-authoritative answer: Name: ourdomain.com Address: ...
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1answer
57 views

Seperate web/mail server, mailserver won't receive emails [closed]

I have a basic set up: VPS Mailserver Domain Management This is my first experience setting up both a VPS and a separate mail server. My mail server won't receive emails. DNS A ...
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1answer
67 views

Suitable Record Type for a web server using a non-standard port?

I need to set up some servers that must be ran on ports above 5000. (This is a request from the client for this job, due to internal policies, and I can't do anything about it). What is concerning me ...
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1answer
2k views

Domain controller is registering 2 IP addresses with DNS

Recently a DC was promoted and the IP was used from the old DC which was demoted and shutdown.How tostop this DC from registering 2 IP addresses with DNS? Please let me know if any questions.
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1answer
42 views

Pointing www to one place, but keep subdomain here

First of all, sorry for the awful wording in the title. I will try to explain what I actually need and hopefully someone here will know if it's possible or no. Basically I want to point my ...
0
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1answer
455 views

Do I need “A record” for AWS ELB while I set up CNAME?

I register the domain through GoDaddy. And now i have a AWS EC2 server behind a ELB. I read the document from AWS about setting up the CNAME. which I did. www CNAME elb.aws.address while ...
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1answer
51 views

Possible to direct naked domain to external IP

So I found this post: configure Bind to have a custom domain on tumblr and I was trying to ask a related question: Would it be possible to set up an A record pointing traffic to domain.com to ...
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1answer
154 views

Moving a web server without moving the email server

I need to move a client's website off their old host and onto their new host without changing their email server. I've read this extremely thorough answer on a similar question ...
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1answer
70 views

Accessing original files on a domain which has A-Record redirect to tumblr [closed]

Hosting a tumblr on a custom domain, but allowing access to files that are at that domain, that are outside of the tumblr CMS. The custom domain I've got two A-Record DNS entries that point over to ...
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1answer
80 views

Swiching webhosting company & database erros

Well here comes the situation. I used to have CompanyA for webhosting. (The hosting plan was a shared one). I decided to change the hosting provider and transfer my website to CompanyB, (exclusive ...
60
votes
6answers
14k views

Why can't MX records point to an IP address?

I understand you should not point a MX record at an IP address directly, but should instead point it to an A record, which, in turns, points to the IP address of your mail server. But, in principle, ...
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2answers
124 views

CNAME or A Record to Site under www root?

So I have a server that runs a webapp and I have recently installed our BMC Track-IT! help desk software on it. I also installed Track-IT! Web which is client facing allowing users to browse their ...
0
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4answers
359 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 ...
0
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1answer
3k views

Alias (CNAME) record cannot be added to this DNS Name [duplicate]

In Microsoft DNS, I'm trying to setup a simple DNS Alias (CNAME) pointing from domain.com to www.domain.com. I also want to forward www.domain.com to a specific IP. In other words, I want to do ...
3
votes
1answer
241 views

How would you setup a up an A record for any negative query?

How would I go about setting up an A record for in Bind9 for any negative queries? I want to forward our staff to an informational page if they were to visit a non existent domain. We have an internal ...
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1answer
3k views

Pingdom error: “No delegation could be found at the parent” when analyzing subdomain

I have a subdomain dramarsarin.crimsonandcyan.com which i wanted to point to another server. I added an A record in the zone file for crimsonandcyan.com with the host 'dramarsarin' and pointed it to ...
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1answer
2k views

DNS A records disappear, but PTR records still remain

We've been having issues with DNS records dropping. Usually it is from DHCP reservations, like printers. Yesterday it was two of our main servers, also DHCP-reserved. Right now I'm looking at a ...
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0answers
44 views

Issue getting DNS wild card A Record (*) working

I have a sub domain named subdomain under main domain named maindomain. Inside subdomain i have wild card (*) A Record that maps to a particular IP Address. This works fine and when i say ping ...
3
votes
0answers
136 views

How do large SaaS providers support A records? [closed]

According to RFC 1035 CNAME records cannot be used used in a zone apex because a CNAME record cannot exist alongside records such as SOA. This is frequently a source of frustration for those trying ...
3
votes
1answer
1k views

Disable AAAA lookups in libcurl

We have a step during in of our large map reduce that does DNS resolutions. The application itself uses the c-ares library as well as libcurl. I notice that with each resolution, there is first an ...
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1answer
1k views

GoDaddy DNS point my Sub-domain to another Server? [closed]

I want my Root Domain to be still sitting on GoDaddy default IP. (To show the default GoDaddy page that we get whenever we buy a new domain). Then my sub-domains to be pointing to my own WebServer. ...
3
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1answer
2k views

Multiple DNS records pointing to a single domain

Our business currently subscribes to a DSL internet connection. We're moving away from this and in fact will have two 3Mbps dedicated fiber connections run into our operations center in the coming ...
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2answers
172 views

DNS A Records For One Domain On Two Servers [closed]

I have two servers, both of which host multiple websites. I would like both servers setup to use a single domain. I have Kloxo installed on both of them and would like to be able to access it via a ...
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2answers
109 views

What's an “empty” DNS A record? [closed]

I know it's not possible an A record to be empty, but what's a good "null" value I can set until I get a machine for the domain? Someone suggested putting localhost in the A record. Is it ok to do ...
2
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2answers
381 views

Why use CNAME in Route 53+S3 combination

I have been going through Amazon's docs on using Route 53 in conjunction with S3 to serve static websites. The strategy they show is to do: example.com A -> alias to ...
0
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2answers
1k views

MULTIPLE A Records for server hosting mail, dns and www on ONE IP

Could not find an answer, really. So I have a server running having one ip address assigned. The server is hosting www, dns and mail. This is how I tried to configure it (excerpt): IN ...