If your accelerated domain has multiple origin servers that each host a different domain, and the origin protocol is set to HTTPS, you can assign a distinct SNI value per origin server so that every HTTPS connection succeeds.
How it differs from the default origin SNI
| Specified origin SNI | Default origin SNI | |
|---|---|---|
| Scope | Per origin server | All origin servers |
| SNI value | Different value for each origin | Same value for all origins |
| Precedence | Takes precedence when both are configured | Applies only when no specified SNI is set |
Prerequisites
Before you begin, confirm that all three conditions apply to your domain:
The accelerated domain name is configured with multiple origin servers.
The origin protocol is set to HTTPS.
Each origin server hosts a different domain name for its web service.
Add an origin SNI entry
Log on to the CDN console.
In the left navigation pane, click Domain Names.
Find the domain name and click Manage in the Actions column.
On the Origin Fetch tab, find the Specify Origin SNI section and click Add.
Configure the following settings.
Origin Address — Select the origin server for which you want to set a custom SNI value.
SNI HOST — Choose the option that matches what your origin server requires:
Option SNI value sent Use when Follow Origin Address Same as the origin server address The origin server address is a domain name, and the origin server requires the SNI to match the origin domain name Follow Origin Host Same as the origin host header The origin server requires the SNI to match the origin host Custom A value you specify The origin server requires the SNI to match a value that is not the origin domain name or the origin host Keep-Alive — Controls whether each SNI value gets its own persistent connection to the origin.
Option Behavior Enable Each SNI uses a separate persistent connection, preventing SNI conflicts on shared connections Disable All requests to the origin share a single persistent connection with one SNI value Click OK.
See also
To set a single SNI value that applies to all origin servers, see Configure an origin SNI.