Help Center/ Cloud Application Engine/ FAQs/ System Configuration FAQs/ How Do I Prevent Access Exceptions Caused by Incorrect Format During Domain Name Configuration?

Updated on 2025-11-21 GMT+08:00

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How Do I Prevent Access Exceptions Caused by Incorrect Format During Domain Name Configuration?

Scenario

This access exception occurs incorrectly entering a full domain name when adding a wildcard domain name in the CAE network access information. For example, entering a.example.com instead of *.example.com will cause the system to match only the specified domain name. Other subdomain names (such as b.example.com) cannot be accessed.

Enter a wildcard or full domain name as required to prevent network access exceptions.

Differences Between Full and Wildcard Domain Names

**Table 1** Differences
Dimension	Full Domain Name	Wildcard Domain Name
Meaning	A specific, unique full domain name points to a specific network resource (such as a server, website, or device).	A wildcard domain name uses the wildcard character (*) to match all (including existing and future) subdomain names under the same primary domain name.
Scope	Only itself	All subdomain names under the primary domain name
Matching Rule	Exact match	Multiple match
Format	Consists of multiple levels of domain names, and specified to the lowest level. Example: www.example.com (subdomain name www of the website) mail.company.com (subdomain name of the enterprise mailbox) server1.lab.school.edu (multi-level subdomain name of a server in the school lab)	Starts with . followed by the primary domain name. Example: .example.com: matches all subdomain names suffixed with example.com, such as a.example.com, b.example.com, and sub.a.example.com. .lab.school.edu: matches all subdomain names suffixed with lab.school.edu, such as pc1.lab.school.edu* and server2.lab.school.edu.
Function	Matches only itself and does not contain other subdomain names. For example, configuring blog.example.com only enables access to this domain name, but not other subdomains such as news.example.com.	Uses the wildcard () to replace any prefix to match all subdomain names under the same primary domain name in batches. For example, configuring .company.com enables access to hr.company.com, it.company.com, and new department.company.com.
Scenario	Used to point to a specific service or resource. For example, the subdomain name www of an enterprise website or the subdomain name mail of an exclusive mailbox.	Used to cover all subdomain names under a primary domain name. For example, all subdomain names of an enterprise need to be accessed through a gateway, or the website supports custom level-2 domain names (such as user1.site.com and user2.site.com).