DNS Manager Overview
Updated by Angel Guarisma Written by Linode
The DNS Manager is a comprehensive DNS management interface available within the Linode Manager that allows you to add DNS records for all of your domain names. This guide covers the use of Linode’s DNS Manager and basic domain zone setup. For an introduction to DNS in general, please see our Introduction to DNS Records guide.
The Domain Name System (DNS) attaches human-readable domain names to machine-usable IP addresses. In many ways, it is the phone book of the Internet. Just like a phone book can help you find the phone number of a business, DNS can take a domain name like
google.com and translate it into an IP address like
18.104.22.168, the IP address for Google’s homepage. This global system allows users to remember the names of websites instead of their numeric IP addresses.
All steps within this guide are completed within the DNS Manager tab of your Linode Manager.
DNS records are only actively hosted on accounts with at least one Linode.
DNS Set-Up Checklist
When setting up any domain name on your Linode, make sure you perform the following steps:
- Register (purchase) a domain name, if you haven’t already.
- Set your domain name to use Linode’s name servers. You’ll need to do this on your domain registrar’s website and then wait up to 24 hours for the change to take effect.
- Use the DNS Manager to Add a domain zone, and then start adding some basic DNS records.
- Set reverse DNS.
- If you have any special DNS needs, such as using a third-party email server, add additional DNS records to create a custom configuration.
Set Domain Names to Use Linode’s Name Servers
After you purchase a domain, set your domain registrar to use Linode’s name servers. Use your domain name registrar’s interface to set the name servers for your domain name to the following entries:
See the instructions on your domain name registrar’s website for more information.
NoteDNS changes can take up to 24 hours to propagate throughout the Internet, although the changes are usually visible within a couple hours.
The DNS Manager
Log in to the Linode Manager and click the DNS Manager tab. It should resemble this:
- All of your domain zones are listed here. A domain zone, essentially synonymous with the term “domain,” is a collection of DNS records for a single domain name. Click the name of a domain zone to add or edit DNS records within that zone.
- If you have a zone that can be exported from a server or another hosting provider, click Import a zone to import it.
- Click Clone an existing zone to duplicate an existing zone that you’ve already set up in the Linode Manager.
- Click Add a domain zone to create a new domain zone.
- Use the links to the far right of the domain zone link to edit DNS records within a zone, to delete a zone, check a zone, or view a zone’s file.
Before you can add any DNS records, you must create a domain zone — a container for DNS records associated with a single domain name.
Add a Domain Zone
If you’re new to Linode, or if have just purchased a new domain name, the first step is to add a new domain zone in the DNS Manager. This creates a container for the DNS records for your domain name. If you don’t know what records to add, the DNS Manager can insert some basic records when you create the new domain zone.
This video runs through the process of adding a new domain zone:
From the DNS Manager tab, select the Add a domain zone link.
Enter the domain name in the Domain field. An example is shown above.
Enter an administrator’s email address in the SOA Email field.
If you are unfamiliar with DNS, the DNS Manager can automatically create some basic DNS records to get you started. To have it insert these records, select Yes, insert a few records to get me started, then select from the drop-down menu the Linode with which you want this domain zone associated.
Alternatively, to keep the domain zone empty and prevent the DNS Manager from creating DNS records, select No, I want the zone empty.
Click Add a Master Zone. The webpage shown below then appears, with your domain zone information.
If you want to add a slave zone instead of a master zone, click the I wanted a slave zone link to the lower right.
In order for Linode’s DNS servers to function as slaves, your DNS master server must notify and allow AXFR requests from the following IP addresses:
22.214.171.124 126.96.36.199 188.8.131.52 184.108.40.206 220.127.116.11 2600:3c00::a 2600:3c01::a 2600:3c02::a 2600:3c03::a 2a01:7e00::a
If you selected the option to have the DNS Manager insert basic DNS records, those records will be visible, as shown above. If you elected to keep the zone empty, you can start adding DNS records now. Skip to the Adding DNS Records section for instructions.
If you selected the option to have the DNS Manager insert basic DNS records, those records will be visible, as shown above. If you elected to keep the zone empty, you can start adding DNS records now.
When you first create a domain zone, you’ll need to add some DNS records. The DNS Manager can create some basic records to get you started when you create your domain zone, but this section explains how to add your own records.
Select a domain zone from within your DNS Manager.
The page is divided into different sections for each type of DNS record. Locate the section for the type of DNS record you want to add, and then click the Add new [DNS] record link.
NoteThe exact form fields will vary depending on the type of DNS record you select.
Enter a hostname in the Hostname field.
Enter the IP address of your server in the IP Address field. For instructions, see Finding the IP Address.
From the TTL menu, select a time interval. TTL, which stands for “time to live,” controls how long DNS records are cached by DNS resolvers before the resolver must query the authoritative name servers for new records.
Click Save Changes.
You have successfully added the DNS record. It can take up to 30 minutes for new DNS records to become active.
You can also modify existing DNS records in the DNS Manager.
- Select a domain zone. The DNS records for the selected domain zone will appear.
- Select the Edit link next to the DNS record you want to edit.
- Edit the DNS record by modifying the existing values in the fields.
- Click Save Changes.
You have successfully edited the DNS record. It can take up to 30 minutes for the record to be updated.
Import Domain Zones with AXFR
If you’re migrating domains to Linode from another hosting provider, and that provider allows zone transfers from its DNS server, it may be possible to import your existing domain zone and DNS records into the Linode Manager. If the import is successful, all of your existing DNS records will be available in the DNS Manager.
Here’s how to import a zone file:
Select Import a zone, from the DNS Manager tab.
Enter the domain name in the Domain field, as shown in the example above.
Enter the name server in the Remote Nameserver field.
NoteThe name server must allow zone transfers (AXFR) from: 18.104.22.168, 22.214.171.124, 2600:3c00::5e, and 2600:3c00::5f
Click Import Zone.
The Linode Manager will connect to the remote name server and import your existing DNS records.
Clone Domain Zones
The Clone a Zone feature allows you to copy DNS records from an existing domain zone in your account to a new zone. Assuming you’ve already set up DNS records for one domain name, this is a good way to quickly create DNS records for another domain name that will be hosted on your existing Linode.
Here’s how to clone an existing zone:
- Click Clone an existing zone from your DNS Manager tab.
Select a zone from the Clone this zone menu.
Enter the name of the new zone in the Into this zone field.
Click Clone Zone.
The DNS records will then be copied from the existing zone to the new zone.
Check Domain Zones
Under normal circumstances, there’s no reason to suspect a problem with your domain zone or DNS records, but sometimes things go wrong. You can use the Check zone feature to verify that your domain zone is working correctly.
In order to check the status of your domain zone, from within the DNS Manager, click the Check option to the far right of your chosen domain zone. A webpage with the results of the domain zone check will then appear.
If you see a message stating that your zone looks good, then everything is working correctly; otherwise, check that all of the DNS records in your domain zone are properly configured.
View Domain Zones
The DNS Manager allows you to view the contents of a domain zone file. This is especially useful should you need to import the zone to a different server, or if you wish to inspect the file.
You can view the contents of the domain zone file through the DNS Manager tab of your Linode Manager. From there, select the Zone file link to the far right column of your chosen domain’s name. An example of the file is provided below.
Remove Domain Zones
If one of your domain names has expired or if you want to start hosting it on another DNS provider, you should permanently remove the domain zone and all of its associated DNS records.
Select the Remove link next to the zone you want to remove.
Click Yes, delete this sucker to permanently delete the zone, including all associated records.
You have successfully removed the DNS record. It can take up to 30 minutes for the changes to be removed.
CautionOnce removed, you MUST delete the Linode nameserver entries from the domain at the registrar level. This is a very important step; if the entries are not removed, someone could use your domain without your permission.
The DNS Manager does not support addition of a subdomain on top of an existing subdomain in the same zone. For example, if you have
example.com as a zone, with an A record for
subdomain.example.com, you cannot create
another.subdomain.example.com within that zone.
Instead, add the subdomain as a separate zone in the DNS Manager, and then create your additional subdomain as an A record.
The DNS Manager uses an asterisk (
*) for wildcards.
Having problems with your DNS records? We recommend reviewing this section to help get your DNS settings back on track. Follow these tips to troubleshoot DNS issues.
Wait for Propagation
If you’ve just made a DNS change and aren’t seeing it reflected yet, try waiting 48 hours. DNS updates will take effect, or propagate, within the time period set by your zone file’s TTL. In some cases the new information may not be reflected for up to 48 hours.
While you can’t control DNS caching at every point on the Internet, you do have control over your web browser. Try holding down the Shift key or the Control key (depending on your browser) while you refresh the page to bypass your browser’s cache of the old DNS data. You can also try bringing up your site in an alternate browser, or Previewing Your Website Without DNS.
Set the Time To Live or TTL
Time to Live (TTL) tells Internet servers how long to cache particular DNS entries. The default TTL for Linode zone files is 24 hours. This is fine for normal DNS situations, because most people don’t update their IP addresses all that often.
However, there are times when you’ll want the TTL to be as low as possible. For instance, when you make a DNS change, you’ll want that change to propagate quickly. Otherwise, some people will see the new site right away, and others (who had the old data cached) will still be visiting the website at your old server. Long caching times can be even more problematic when it comes to email, because some messages will be sent to the new server and some to the old one.
The solution is to lower your TTL before making a DNS change. You’ll want to lower the TTL first, on its own, before making any other DNS changes. Here’s a general overview of what should happen during a smooth DNS update:
NoteTTL is always written out in seconds, so 24 hours = 86400 seconds.
- Check the TTL on your current zone file. Typically, this will be 24 or 48 hours.
- Update your current zone file 48 (for a 24-hour record) to 96 (for a 48-hour record) hours early, taking into account any intermediate DNS servers. Lower the TTL to five minutes (300 seconds, or the lowest allowed value). Do not make any other changes at this time. If you’re using Linode’s DNS Manager, lower the TTL to 5 minutes for each entry you’re going to change.
- Wait out the original 48 to 96 hours.
- Visit your zone file again to make all of your IP address - and other - updates.
- DNS changes should propagate within 30 minutes.
Find Current DNS Information
Sometimes you may need to find the current DNS information for a domain. There are two great tools for doing this:
- dig: Look up individual DNS entries. For example, you can find the IP address where your domain resolves.
- whois: Find your registrar and nameserver information for your domain.
If you’re using a computer that runs Mac OS X or Linux, you can use these tools from the command line. To find your domain’s IP (the primary A record), run:
Look in the answer section of the output to locate your IP address. You can also query for other types of records. For example, to see the mail records for a domain, run:
dig mx example.com
This returns all of your domain’s MX records.
To find your domain’s registrar and nameserver information, run:
This generates a large amount of information about the domain. The basic information you need will be near the top of the output, so you might have to scroll back to see it.
If you’re on a Windows machine, or you’re more comfortable using a web-based tool, you can also use kloth.net for dig requests and whois.net for WHOIS requests. Note that since you’re running these lookups from a third-party website, the information they find is not necessarily what your local computer has cached. There should be a difference only if you’ve made recent changes to your DNS information.
This guide is published under a CC BY-ND 4.0 license.