Printer PDL Data Stream

PDL-DATASTREAM, operating on port 9100, is a protocol used for sending print jobs directly to printers. It is widely used in networked printing environments due to its efficiency and simplicity. This service allows for the direct transmission of print data streams, bypassing the need for intermediary print servers.

What is Printer PDL Data Stream

PDL-DATASTREAM, also known as Port 9100 printing, is a protocol used for sending print jobs directly to printers. This service is particularly popular in networked printing environments where multiple devices need to send print jobs to a centralized printer. The protocol allows for the direct transmission of print data streams, which can include text, images, and other print commands, directly to the printer.

The PDL-DATASTREAM protocol is efficient and straightforward, making it a preferred choice for many organizations. It bypasses the need for intermediary print servers, reducing the complexity and potential points of failure in the printing process. This direct communication method ensures that print jobs are processed quickly and accurately.

Historically, PDL-DATASTREAM has been widely adopted due to its compatibility with various printer models and manufacturers. It supports a range of print languages, including PCL (Printer Command Language) and PostScript, making it versatile and adaptable to different printing needs. The protocol's simplicity and reliability have made it a staple in both small and large-scale printing environments.

Printer PDL Data Stream runs on TCP and UDP port 9100 and is official IANA port.

Security risk

If port 9100 is left open and the PDL-DATASTREAM service is running, it can expose the printer to unauthorized access. Malicious users could send unwanted print jobs, potentially wasting resources and causing disruptions. Additionally, sensitive information sent to the printer could be intercepted or manipulated, leading to data breaches.

In our UFW tutorial you can follow instructions how you can configure UFW to close port 9100. Use StackChanges to monitor if the Printer PDL Data Stream port is closed and stays closed. StackChanges will send an alert if port 9100 is open again.