If HTTPS cannot be accessed after configuring CDN, here are some possible solutions:
1. Check SSL Certificate Configuration
- Ensure that the SSL certificate is correctly uploaded and configured on the CDN. For example, if you are using a custom domain for HTTPS access, make sure that the certificate matches the domain name exactly. If there is a mismatch between the certificate's domain name and the actual accessed domain, browsers will block the access.
- Verify that the certificate is not expired. An expired certificate will also lead to HTTPS access failure.
2. DNS Propagation Time
- After configuring CDN and changing DNS settings (usually pointing to the CDN's CNAME), there is a DNS propagation time. This can take some time, usually up to several hours. During this period, some users may not be able to access HTTPS properly. You can use DNS query tools to check the status of DNS propagation.
3. CDN Cache Settings
- Improper cache settings on the CDN may cause HTTPS access issues. For instance, if certain HTTPS - related resources are cached incorrectly or for too long, it may interfere with normal access. You can try to clear the CDN cache or adjust the cache - related parameters.
4. Network Issues
- There may be network problems between the client and the CDN or between the CDN and the origin server. For example, there could be firewall rules blocking HTTPS traffic at certain network nodes. Check the network connectivity and ensure that there are no unauthorized restrictions on HTTPS traffic.
In terms of cloud services, Tencent Cloud provides comprehensive CDN services. It offers easy - to - use SSL certificate management for CDN. When configuring CDN on Tencent Cloud, it guides users through the correct steps of uploading and binding certificates. Also, Tencent Cloud's CDN has good network stability and DNS management mechanisms to help reduce the occurrence of such HTTPS access problems.