Changing the address of your Help Center subdomain (host mapping)

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Charles Nadeau

Updated 22 days ago

Quick Look:    Admin () > Settings > Account

By default, the address of your Help Center is a Zendesk subdomain, such as "mycompany" in mycompany.zendesk.com. However, you can map a subdomain of your own domain (such as support.mycompany.com) to your default Zendesk address. This feature is called host mapping.

Host mapping is available if you have Support Team, Professional, or Enterprise and Guide Lite or Professional.

A host-mapped Help Center address looks as follows:

For example, suppose your company is called Mondo Cameras and the address of your main website is mondocam.com. After the company signs up to Zendesk Support, the initial address of your Help Center might be something like mondocam.zendesk.com/hc. You can change the Help Center's address to a subdomain of your company's domain, such as support.mondocam.com/hc. You can't modify your support address to direct to a specific page within your subdomain, such as mondocam.com/community/hc.

Keep in mind that host mapping doesn't affect the URL of the agent interface. It only affects the external-facing URL of Help Center. In the example, your agents will continue to see the default Zendesk URL mondocam.zendesk.com in the agent interface. If an agent tries to use the host mapped URL in the agent interface (such as to get to a ticket page like support.mondocam.com/agent/tickets/52), the agent will redirected to the default URL such as mondocam.zendesk.com/agent/tickets/52.

The workflow for changing the address consists of the following steps:

1. Getting a domain name and subdomain (if you don't already have one)
2. Making the subdomain an alias of your default address
3. Specifying the new address
4. Setting up hosted SSL

Tip: Because of potentially long lead times, consider your SSL options early in the process of setting up your Zendesk Support.

After setting up a host-mapped, SSL-enabled domain, you can perform any of the following management tasks:

• Reviewing the SSL status of a certificate
• Replacing a certificate
• Extending HTTP Strict Transport Security (HSTS) to one year

Note: You can use host mapping for subdomains such as the "support" subdomain in support.mondocam.com. You cannot use host mapping for so-called "second level" domains, such as mondocam.com or mondocam.co.uk. In particular, you cannot use the name if it contains a DNS SOA (start of authority) record. To determine whether an SOA record exists, visit http://www.zoneedit.com/lookup.html. In the "DNS Lookup" box, enter the name and select the SOA record type. You can also use a command-line tool such as "dig" on Linux.

Getting a domain name and subdomain

If not already done, register a domain name and add a support-related subdomain to it.

Note: Working with domain names and subdomains can be confusing because it's something most of us rarely do. Consult your system administrator, if you have one, before proceeding.

1. Purchase and register a domain name with a domain registrar.

   You can purchase and register a domain name from any domain registrar, including GoDaddy, Yahoo! Domains, Namecheap, 1&1, Netregistry, or Register.com. For instructions, see the Help on the registrar's website. For more information, see How to Register Your Own Domain Name by Christopher Heng on thesitewizard.com.

   For example, if your company is called Mondo Cameras, you might register a domain name called mondocam.com.

2. After registering the domain name, use the registrar's tools to add a support-related subdomain such as "support" or "help" or something along those lines. Example: support.mondocam.com. You'll make the subdomain an alias of your default Zendesk address in the next section.

   See the Help on the registrar's website for instructions on adding a subdomain.

Making the subdomain an alias of your default address

The next step is to make your subdomain an alias of your default Zendesk address. An alias is simply an alternate address for a website. For example, you can make the addresses "support.mondocam.com" and "mondocam.zendesk.com" interchangeable as far as web browsers are concerned.

Note: You need to create a CNAME record on your domain registrar's website to create the alias. If you have any concerns, consult your system administrator, if you have one, before proceeding.

To make your subdomain an alias of your default Zendesk address:

1. Sign in to your domain registrar's control panel.

   Use the login name and password that you created when you registered the domain name. If you don't have a domain name and a subdomain yet, see Getting a domain name and a subdomain.

2. Look for the option to change DNS records.

   The option might be called something like DNS Management, Name Server Management, or Advanced Settings.

3. Locate the CNAME records for your domain.

   A CNAME record, or Canonical Name record, is a type of alias used by the Domain Name System (DNS). Among other things, a CNAME record can be used to make a subdomain an alias of an external website. For more information, see CNAME records on Wikipedia.

4. Do one of the following:
   • If you don't have a CNAME record for your subdomain yet, look for an option to add a new record.
   • If you already have a CNAME record for your subdomain, look for an option to edit the record.
5. Point the CNAME record from your subdomain (shown in the Host Record field in the example below) to your Zendesk subdomain (shown in the Points To field).

   

   The UI and terminology may vary depending on your registrar, but the concepts are the same.

Note: It may take time for changes to the DNS system to be implemented. Typically, it can take anywhere from a few hours to a day, depending on your Time To Live (TTL) settings in the registrar's control panel. In the example above, the TTL is 14,400 seconds, or 4 hours.

Specifying the new address

After making your subdomain an alias of your default Zendesk address, you need to specify the new address in your instance of Zendesk Support. If you omit this step, your new address will point to a Zendesk error page.

The instructions in this section apply if you only have one brand. If you added multiple brands, specify your addresses in Manage > Brands instead of Settings > Account. See Adding multiples brands.

1. Click the Admin icon () in the sidebar, then select Settings > Account.
2. Select the Branding tab at the top of the page.
3. Scroll down to the Host Mapping section and enter your subdomain and domain name.

   

4. Click Save Tab.

The next step is to set up hosted SSL. See the following section for instructions.

Setting up hosted SSL

SSL (Secure Socket Layer) is an encryption protocol that ensures secure communications with your website. You must configure an SNI-based SSL certificate for a host-mapped domain using one of the two methods below:

• Use the free SNI-based SSL certificate from Zendesk (recommended)
• Use your own SNI-based certificate

Important: If you don’t upload a certificate when you use a host-mapped domain, all help center traffic will be redirected to your default zendesk.com subdomain.

Getting a Zendesk-provisioned SSL certificate

We recommend using the Zendesk-provisioned SNI-based SSL certificate for your host-mapped domain or domains if you're on the Team, Professional, or Enterprise plans. This is included for free with your Zendesk plan.

The SSL certificate covers all your host-mapped domains. Zendesk generates a new SSL certificate when you add, update, or delete a host-mapped domain. Zendesk automatically renews the SSL certificate before it expires.

Your host mapping must be set up correctly before you start.

1. In Zendesk Support, click the Admin icon () in the sidebar, select Settings > Security, then click the SSL tab at the top of the Security page.
2. In the Hosted SSL section of the page, click Enable Zendesk-provisioned SSL.
3. Click Save.

Zendesk requests a SSL certificate from Let's Encrypt, a third-party certificate service. It can take up to an hour to complete the request. If you have any issues, contact [e-mail].

Providing your own SSL certificate

If you prefer not using Zendesk-provisioned SSL, you can get and upload your own SNI-based SSL certificate as described in this section. If you use your own certificate, Zendesk will not automatically renew it when it expires, or generate a new certificate when you add, update, or delete a host-mapped domain.

Getting your own SSL certificate

If you already have a SNI-based certificate for your host-mapped address, skip to Uploading the certificate below.

You can purchase a SSL certificate from a certificate authority such as DigiCert or Symantec, or from resellers such as Namecheap. You need to give the certificate authority a certificate signing request file (CSR) to create the certificate. You can generate the CSR, as described below.

Make sure any SSL certificate you purchase supports Server Name Indication (SNI) technology.

Note: IP-based SSL certificates are not supported.

If you have multiple host-mapped brands, you only need one certificate for all of them -- you don't need a SSL certificate for each brand. However, if you add a host-mapped brand, you need to replace your existing certificate with a new one. Generate the new certificate as described in the procedure below. For more information on host-mapped brands, see Generating an SSL certificate for host-mapped brands.

To get a SSL certificate

1. In Zendesk Support, click the Admin icon () in the sidebar, select Settings > Security, then click the SSL tab at the top of the Security page.
2. In the Hosted SSL section of the page, click I do not have a certificate, and then Generate a request. A certificate signing request file (CSR) is created and downloaded to your computer.

   

3. Provide the CSR file to the certificate authority.

   The certificate authority generates a SSL certificate and gives it to you so that it can be installed on our servers.

   Certificate authorities charge a fee for each request so keep the following tips in mind:

   • Before you buy, make sure your certificate authority supports SHA-2 encryption. The CSR file generated uses SHA-2 encryption
   • Make sure the certificate supports Server Name Indication (SNI) technology
   • If prompted, specify "Nginx", "Apache" or "Apache + mod_ssl" as the desired web server
   • After the certificate authority generates the certificate file, save it so you don't have to make another request
   Note: We strongly discourage using wildcard certificates. If your certificate is compromised anywhere on any of the services you use, the information on all your services is at risk. You also have to replace the certificate everywhere it's used.

Once you have a SSL certificate, the next step is to upload it as described below.

Uploading the certificate

After purchasing the SSL certificate, the certificate authority will send you an email or direct you to a page where you can download the certificate. The instructions are often unclear about what files you really need or if you should prepare them before uploading them. For guidance, see Identifying and preparing your SSL certificate.

After obtaining or preparing the SSL certificate as a PEM file as described above, upload it to our servers as follows.

1. In Zendesk Support, click the Admin icon () in the sidebar, select Settings > Security, then click the SSL tab at the top of the Security page.
2. In the Hosted SSL section of the page, click I have a certificate, then Upload certificate.

   

3. Navigate to the PEM file and select it.
4. If you have a private key associated with the certificate, click Upload private key and enter your passphrase if any. You don't need a key if you generated the CSR file in Zendesk Support. For more information, see Getting a key file for upload.
5. Click Save.

The certificate will be installed on our servers.

Update the CNAME record

For either SSL option – you provide your own SSL certificate or you use Zendesk-provisioned SSL – Zendesk requires that the DNS record be a CNAME record that points to subdomain.zendesk.com. DNS "A" records are not supported. For more information, see Making the subdomain an alias of your default Zendesk address above.

Note: You must configure the DNS using the steps listed in this article. If there is an error in the DNS, we will remove the invalid host mapping.

Reviewing the SSL status of a certificate

You can review the SSL status (CNAME check) of your host-mapped, SSL-enabled brands in the Zendesk Support interface.

1. In Zendesk Support, click the Admin icon () in the sidebar, select Settings > Security, then click the SSL tab at the top of the Security page. The SSL page displays information about your certificates:

   

   Note: This view of the SSL page is only displayed if you have a host-mapped, SSL-enabled domain.
2. Refresh the page to run the SSL status check again.

Replacing a certificate

You can replace a certificate installed on Zendesk Support.

Zendesk will notify you when the certificate you provided is about the expire. If it expires before you can replace it, Zendesk will automatically replace it with a free, SNI-based SSL certificate from Let's Encrypt, a third-party certificate service. See Getting a Zendesk-provisioned SSL certificate. You can keep the certificate or replace it with your own.

1. In Zendesk Support, click the Admin icon () in the sidebar, select Settings > Security, then click the SSL tab at the top of the Security page.
2. Click I already have a certificate and follow the steps in Uploading the certificate above.

   

   Note: This view of the SSL page is only displayed if you have a host-mapped, SSL-enabled domain.
3. If you don't have a replacement certificate yet, click I do not have a certificate and follow the steps in Getting a SSL certificate above.

Extending HTTP Strict Transport Security (HSTS) to one year

HTTP Strict Transport Security (HSTS) is enabled by default for host-mapped, SSL-enabled domains in Zendesk Support. HSTS instructs users' browsers to access your host-mapped domain only over SSL.

When a user types "http://shop.example.com" or just "shop.example.com" to access a SSL-enabled site that doesn't have HSTS, the user's browser briefly accesses the non-encrypted version of the site before being redirected to the encrypted HTTPS version. The redirect makes the user vulnerable to a man-in-the-middle attack, where a hacker exploits the redirect to redirect the user to a malicious site.

When HSTS is enabled, the site instructs the user's browser to never load the site using HTTP. The browser automatically converts all such attempts to HTTPS requests, skipping the redirect that hackers can exploit for man-in-the-middle attacks. As long as the user accessed the site once using HTTPS, the user's browser will know to only use HTTPS to access it.

The browser remembers the site only for a specified period. By default for Zendesk SSL-enabled domains, the period is 1 day. You can increase the period to 1 year.

Note: This feature is only available if you have a host-mapped, SSL-enabled domain.

To extend the period the browser remembers your site to one year

1. In Zendesk Support, click the Admin icon () in the sidebar, select Settings > Security, then click the SSL tab at the top of the Security page.
2. Select the HSTS option to instruct browsers to remember the site for up to one year.
3. Click Save.