ISO-TSAP Class 0

ISO-TSAP, operating on Port 102, is a protocol used for ISO Transport Service Access Point. It plays a crucial role in enabling communication between different systems in OSI model networks. This service is essential for ensuring interoperability and data exchange in complex network environments.

What is ISO-TSAP Class 0

ISO-TSAP, or ISO Transport Service Access Point, is a protocol that operates on Port 102. It is a fundamental component of the OSI (Open Systems Interconnection) model, specifically designed to facilitate communication between different systems. The OSI model is a conceptual framework used to understand and implement network protocols in seven layers, and ISO-TSAP is integral to the transport layer.

The primary function of ISO-TSAP is to provide reliable data transfer services between networked devices. It ensures that data packets are delivered accurately and in the correct sequence, which is critical for maintaining the integrity of communications in complex network environments. This protocol is widely used in industrial and enterprise networks where interoperability between diverse systems is required.

Historically, ISO-TSAP has been instrumental in the development of standardized communication protocols. It has enabled different manufacturers and developers to create compatible systems, fostering a more interconnected and efficient network infrastructure. Companies that rely on robust and reliable data exchange, such as those in telecommunications, manufacturing, and large-scale IT environments, often utilize ISO-TSAP to ensure seamless operations.

ISO-TSAP Class 0 runs on TCP and UDP port 102 and is official IANA port.

Security risk

If Port 102 is open and the ISO-TSAP service is running, it could be a potential target for cyber-attacks. Unauthorized access to this port could lead to data interception, manipulation, or disruption of communication services. It is crucial to implement proper security measures, such as firewalls and access controls, to mitigate these risks.

In our UFW tutorial you can follow instructions how you can configure UFW to close port 102. Use StackChanges to monitor if the ISO-TSAP Class 0 port is closed and stays closed. StackChanges will send an alert if port 102 is open again.