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FileMaker Web Sharing
Port 591 is commonly used by FileMaker's Web Publishing feature as an alternate HTTP port, allowing clients to access FileMaker databases via a web browser. It serves as an alternative to the standard port 80 for providing data-driven web interfaces directly from within FileMaker Server, enabling developers and users to publish, view, and interact with database content easily over the network..
Purpose & Use: Port 591 is primarily associated with FileMaker Pro and FileMaker Server's Web Publishing Engine, introduced in FileMaker 6.0 and later versions. It enables access to FileMaker databases over the web without the need for an external web server, serving HTML pages, XML data, and facilitating web-based interactions.
Alternate HTTP Port: While port 80 is the default for HTTP traffic, FileMaker utilizes port 591 as an alternate to avoid conflicts with other web services running on port 80. This alternate port enables the built-in web server to run concurrently with other HTTP services, offering flexibility during deployment and configuration.
Protocols & Data Flow: The service operates over TCP, supporting standard HTTP requests, custom FileMaker web publishing protocols, and often integrates with XML or PHP gateways. It does not inherently provide encryption; additional security measures like SSL/TLS should be configured externally if encryption is required.