This document describes the COS access methods and the way to determine a private network access. It also provides the connectivity test sample to help you learn more about CVM access to COS.

Access Methods

If you have deployed a service in Tencent Cloud to access COS, different access modes apply to as follows:

• Intra-region access: access within the same region will be automatically directed to a private network address. A private network connection is automatically used, incurring no traffic fees. Therefore, we recommend choosing the same region when you purchase different Tencent Cloud products to save on costs.
• Cross-region access: currently, cross-region requests do not support private network access and will be resolved to a public network address by default.

Determining a Private Network Access

To determine whether a CVM accesses COS via a private network, perform the following steps.
Run the nslookup command on the CVM to resolve the COS domain name. If a private IP is returned, the access is over a private network; otherwise, it is over a public network.

1. Obtain and record the bucket access domain as instructed in Bucket Overview.
2. Log in to the CVM instance and run the nslookup command. Assume that examplebucket-1250000000.cos.ap-guangzhou.myqcloud.com is the address of the destination bucket, run the following command.

   nslookup examplebucket-1250000000.cos.ap-guangzhou.myqcloud.com
   

   In the command output, the 10.148.214.13 and 10.148.214.14 IPs indicate that the access to COS is over a private network.

   Note：

   Generally, a private IP takes the form of 10.*.*.* or 100.*.*.*, and a VPC IP takes the form of 169.254.*.*. These two types of IPs indicate a private network access.

   

Test Connectivity

See the “Testing connectivity” section in Request Creation Overview for the COS access samples through a public network, access through Tencent Cloud CVMs (classic network) within the same region and access through Tencent Cloud CVMs (VPC) within the same region.

Relevant Operations

• Mounting COS to Windows Server as Local Drive
• Storing Remote WordPress Attachments to COS