What matters in link settings and file download/upload management is an unbreakable resolve

An easily overlooked point in WAS security is symbolic link and alias settings, along with file download/upload size limits. If path settings left open for convenience are misconfigured, sensitive system files like /etc/passwd can be accessed, and allowing unlimited large-file transfers can lead to server resource exhaustion or malicious file uploads.

In IIS, check the site's directory browsing settings and actual paths to remove unnecessary shortcut icons, and in Apache HTTP Server, turn off FollowSymLinks and clean up Alias settings and unnecessary symbolic links. Tomcat should keep allowLinking="false", NGINX should verify the root path and unnecessary system path settings, and any symbolic links remaining in modules-enabled or sites-enabled should also be cleaned up.

File transfer limits should also be set together. IIS should adjust the maximum content length in request filtering and the ASP limit values, Apache should set LimitRequestBody, and Tomcat should limit maxSwallowSize. NGINX should specify client_max_body_size, Spring Boot should set max-file-size and max-request-size, and in Node.js, the limit value of body-parser should be specified to control upload/request size.

The key is not to leave convenience features turned on, but to continuously check for unnecessary path exposure and unlimited transfers. Since a single small setting can lead to system privilege exposure or overload, the habit of checking things through to the end is important in WAS operations.