By sending a Lookup request to the portmapper TCP 135 it was possible to enumerate the Distributed Computing Environment services running on the remote port. Using this information it is possible to connect and bind to each service by sending an RPC request to the remote port/pipe.

Port(s) Protocol Service Details Source; 139 : tcp,udp: netbios-ss: NetBIOS is a protocol used for File and Print Sharing under all current versions of Windows. While this in itself is not a problem, the way that the protocol is implemented can be. There are a number of vulnerabilities associated with leaving this port open. NetBios services: Restricting Active Directory RPC traffic to a specific port Apr 17, 2018 How to Check Open TCP/IP Ports in Windows Jul 03, 2017

TCP port 135 is shared by DCOM(based on RPC) and Raw RPC server component as a public entrance of TCP/UDP/NamedPipe transport layer which is chosen by each DCOM/Raw RPC server component, so it's not simple as "disabling DCOM on this computer" will stop port 135.

Check that TCP Port 135 is open for inbound communication from Azure ATP Sensors, on all computers in the environment. Check all network configuration (firewalls), as this can prevent communication to the relevant ports. NetBIOS: Check that UDP Port 137 is open for inbound communication from Azure ATP Sensors, on all computers in the environment. Security concerns with port 135 - Micro Focus Community ALM uses DCOM to communicate with QTP or the testing tools when executing a test case remotely, the default port used is 135. The DCOM port is a fixed network port that cannot be changed. DCOM communications are established on port 135, and you cannot change this port number. The following MS KB outlines how DCOM uses ports and how you can

Port 135 may refer to: . in computing — Distributed Computing Environment (DCE), a framework and toolkit for developing client/server applications in Internet — Remote procedure call (RPC), a communication process that allows for executing a subroutine or procedure in another address space

windows 7 - How to stop listening at Port 135? - Super User TCP port 135 is shared by DCOM(based on RPC) and Raw RPC server component as a public entrance of TCP/UDP/NamedPipe transport layer which is chosen by each DCOM/Raw RPC server component, so it's not simple as "disabling DCOM on this computer" will stop port 135. Trying Hardening Windows 2000 with DCOMbobulator and close Jul 26, 2020 Port 139 (tcp/udp) :: SpeedGuide