Quotas and limits in Cloud CDN

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Updated at November 11, 2025

Yandex Cloud CDN has the following limits:

Quotas are organizational constraints that can be changed by support on request.
Limits are technical constraints of the Yandex Cloud architecture. You cannot change the limits.

If you need more resources, you can increase your quotas in one of the following ways:

To have your request processed, you must have the quota-manager.requestOperator role or higher, e.g., editor or admin.

You can manage your quotas with Cloud Quota Manager.

Type of limit	Value
Number of CDN resources per cloud `cdn.resources.count`	20

Type of limit	Value
Number of requests for cache purging per minute	1
Number of file paths per cache purging request	10
Number of requests for preloading files per minute	1
Number of paths to preloaded files per request	100
Number of IP addresses (subnet prefixes) in the IP-based access policy list	100
Number of CORS domains when responding to client (EdgeCDN provider) requests	20

The following restrictions apply to HTTP headers when using the EdgeCDN provider:

The HTTP header name may contain Latin letters (A-Z and a-z), numbers (0-9), underscores (_), and hyphens (-).
The HTTP header value:
- Must start with a Latin letter (A-Z or a-z), number (0-9), asterisk (*), or opening curly bracket ({) and may only contain characters with 32 to 126 ASCII codes, except for the backslash (\), dollar sign ($), and single quotation mark (').
- May not begin or end with a space.
- May contain Latin letters (A-Z and a-z), numbers (0-9), underscores (_), dots (.), slashes (/), colons (:), hyphens (-), equal signs (=),and spaces ( ).
- May contain only single spaces between any two characters.
- May not contain the websocket or upgrade values.
- May not contain more than 512 characters.