Port 135 is a networking endpoint primarily associated with Microsoft’s Distributed Component Object Model (DCOM) and Microsoft Remote Procedure Call (MSRPC) endpoint mapper service. This service acts as a directory, enabling applications to locate and communicate with other services running on a networked computer. When a client initiates a DCOM or MSRPC connection, it initially contacts this port to discover the dynamically assigned port number of the desired service.
The significance of this port lies in its central role in Windows inter-process communication and remote administration. It facilitates essential network functionalities like Active Directory replication, software updates, and remote system management. Historically, its widespread use has also made it a frequent target for security exploits, necessitating careful management and security protocols to mitigate potential risks. Its continued presence underscores its integral function within Windows-based environments.
