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Manage domains
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Manage domains

Content can be distributed via default-domain and personal-domain.

Default domain⁠

When you create a CDN resource, a default domain is automatically generated:

  • Selectel — of the form *.selcdn.net;
  • Akamai — of the *.akamaized.net kind.

You can view the default domain in Control Panel under CDN → CDN Resources → CDN resource page → General tab.

It is not recommended to distribute content directly through the default domain, as the use of third-party domains can make it difficult to promote the site and affect the order in the search engine.

Through the default domain, content distribution via HTTPS protocol, the certificate for it is issued automatically. The type of certificate depends on the provider:

Personal domain⁠

For your information

For the Akamai resource, content distribution with the personal domain is performed only via HTTP, even if an SSL certificate is added to the personal domain.

It is recommended to use third-level subdomains for the source domain as personal domains — for example, cdn.example.com for the example.com domain. A CNAME record will be used to forward requests to default-domain.

You can also use a second-level domain other than the source domain as your personal domain — for example, example1.com for the domain example.com. An ALIAS record will be used to forward requests to default-domain. This will reduce the speed of content delivery, as it will always select the CDN server near the nearest region Selectel, not near the user. For example, a request from Khabarovsk will go to Novosibirsk, although there are Akamai and Selectel CDN servers in Khabarovsk.

By default, there is a limit of 10 personal domains for each CDN resource. To increase this limit for free, create a ticket.

Connect personalized domain⁠

  1. If you don't already have a domain you want to use as a personal domain, register it in your DNS hosting control panel.

  2. In your DNS hosting control panel, create a resource record:

    • record type — CNAME for a subdomain or ALIAS for a second-level domain;
    • record name is the domain name. For CNAME — a subdomain of the form cdn.example.com, for ALIAS — a second-level domain other than the content source;
    • value is the default domain of the form *.selcdn.net or *.akamaized.net. Specify the domain without the protocol. You can view the default domain in Control Panel under CDN → CDN Resources tab → CDN resource page → General tab.
    • value is the default domain of the form *.selcdn.net or *.akamaized.net. Specify the domain without the protocol. You can view the default domain in Control Panel under CDN → CDN Resources → CDN resource page → General tab.

  3. In Control Panel, go to CDN → CDN Resources.

  4. Open the CDN resource page → General tab.

  5. In the Personal Domains block, click Add Domain.

  6. Specify the personal domain for which you configured the record. If you need to attach multiple domains, add them in the same window, as each domain operation results in the reissuance of Let's Encrypt® CDN resource certificate.

  7. Press Connect.