What Port Does RPC Use?

What is RPC used for?

Remote Procedure Call (RPC) is a protocol that one program can use to request a service from a program located in another computer on a network without having to understand the network’s details.

RPC is used to call other processes on the remote systems like a local system..

Why is port 139 open?

Port 139 is utilized by NetBIOS Session service. Enabling NetBIOS services provide access to shared resources like files and printers not only to your network computers but also to anyone across the internet.

What are the RPC dynamic ports?

The RPC Dynamic Port ranges are a range of ports utilized by Microsoft’s Remote Procedure Call (RPC) functionality. This port range varies by operating system. For Windows Server 2008 or greater, this port range is 49152 to 65535 and this entire port range must be open for RPC technology to work.

Is port 135 TCP or UDP?

Inbound connection in port 135 (UDP/TCP) is not blocked in Windows firewall.

What is RPC port number?

The unique RPC identifier is called the RPC service number. … Service numbers are defined in a 4-byte field, which provides up to 4,294,967,296 possible service numbers. The Portmapper service listens on a static port (TCP or UDP port 135).

What is the use of port 135?

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.

What is port 139 commonly used for?

GRC | Port Authority, for Internet Port 139. Description: TCP NetBIOS connections are made over this port, usually with Windows machines but also with any other system running Samba (SMB). These TCP connections form “NetBIOS sessions” to support connection oriented file sharing activities.

What is port 445 commonly used for?

TCP port 445 is used for direct TCP/IP MS Networking access without the need for a NetBIOS layer. This service is only implemented in the more recent verions Windows starting with Windows 2000 and Windows XP. The SMB (Server Message Block) protocol is used among other things for file sharing in Windows NT/2K/XP.

What is port 443 normally used for?

Port 443 is mainly used by web servers providing HTTPS (HTTP encrypted by SSL or TLS). It can also be used by some VPN services, generaly to bypass some firewall limitations by impersonating HTTPS port. 443 (TCP) facilitates HTTPS / SSL – encrypted web traffic.

What is RPC and how it works?

RPC is a request–response protocol. An RPC is initiated by the client, which sends a request message to a known remote server to execute a specified procedure with supplied parameters. The remote server sends a response to the client, and the application continues its process.


To use TCP or UDP, your RPC addresses must end in the medium names whereas UDP is a datagram protocol. The RPC system uses one or the other as instructed. UDP may be faster but is not available on some machines.

Does WMI use RPC?

WMI technology is based on DCOM / Remote Procedure Call (DCOM/RPC) communication. DCOM/RPC allocates the ports used by the server within a dynamic port range—typically between ports 1024 and 65536. To configure these ports using Windows Firewall on your managed computers, enable the Inbound Rules in the WMI group.