If Alibaba Cloud CDN returns an error message, see CDN - Error Codes. Otherwise, find your issue and a solution in the categories below.
For more information about common CDN errors, see CDN - Error Codes.
Basic features
Purchases and billing
How am I billed for traffic when I use Alibaba Cloud CDN with other Alibaba Cloud services?
Why do I still have overdue payments or incur charges after purchasing a resource plan?
Why am I still billed based on the previous billing method after I change the billing method?
Am I charged for traffic and requests generated by attacks or malicious activities?
Access issues and exceptions
Troubleshoot 5xx errors when CDN makes back-to-origin requests
Why can't I retrieve files from a POP or access my domain name?
How to determine whether an access issue is caused by a POP or your origin server
Why doesn't activating overseas POPs improve access speed for overseas users?
Why do URL parameters fail to load after I add a domain name to CDN?
What are the SEO impacts of using CDN?
NoteIf a dual-layer Content Delivery Network (CDN) setup causes indexing issues with search engines, such as Baidu, try the following steps to rule out potential causes:
Adjust the CDN configuration, such as by disabling dynamic content acceleration, to rule out interference with search engine crawlers from caching policies or back-to-origin mechanisms.
Consult an SEO professional to confirm the search engine's indexing criteria and identify the specific cause of the issue.
Why is a 403 status code returned when I access CDN resources?
Troubleshooting slow access to HTTPS websites with a stable local network
Domain names and resolution
Cache
Why does using variable parameters in URLs lower the cache hit ratio?
Disable the caching policy for a specified directory or file
How do I set the cache expiration time on the origin server when accelerating static resources?
What do I do if I receive the "The prefetch queue is full" error when I prefetch a URL?
Why is website access slow after I enable Alibaba Cloud CDN acceleration?
Origin pull and origin servers
Why is my back-to-origin traffic greater than the access traffic?
How to configure multiple origin servers for a domain name in CDN
What is the difference between an origin host and an origin server configured in CDN?
Why is Gzip compression not enabled for back-to-origin requests through CDN?
How to point a domain name to the origin server for CDN troubleshooting
What is the health check mechanism of Alibaba Cloud CDN for origin servers?
HTTPS
Configure HTTPS intermediate certificate for Alibaba Cloud CDN accelerated domain name
What should I do if the HTTPS certificate on the origin server conflicts with the one on CDN?
How do I configure an HTTPS certificate for a wildcard domain name?
What should I do after my free personal test certificate expires?