
FirewallsĪ third-party firewall or any other security application running on a server, or on a client, might sometimes block the traffic from reaching the server on its TCP ports, resulting in the interruption of RPCs. If an RPC server's name is mapped to a wrong IP address, it results in client contacting the wrong server and can possibly result in an RPC error. When a client initiates a request, the request is sent to the server using its name, IP address, and port address. In such cases, a client fails to send out a procedural call to the server resulting in the “RPC server unavailable” error. Since remote procedure call relies on the network for its functioning, lack of a proper network connection might lead to server unavailability issues. If anything goes wrong here, RPC will cease to function. When a procedure call or a request is made to a peripheral device such as a printer, the peripheral must be enabled for RPC and must be connected to the network with the client for it to function. This is the most common cause of RPC errors. Reasons for RPC errors File and printer sharing are disabled Remote calls are, however, very intermittent when it comes to the performance and are therefore difficult to trace down.
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Therefore, it is quite common to face an “RPC server unavailable” issue if you are a Windows user. On a simple note, any Windows process involving the distribution and sharing of data over a network usually uses RPC technology. RPC plays a vital role in managing devices remotely across a network and is used to share access to peripherals such as printers and scanners. The call is then decrypted by the server and a response is sent back to the client. In RPC, a procedure call is initiated by a client system, which is encrypted and then sent to the server. For purposes of this tutorial, a process invoking a request will be termed as a “client” and the process responding back to the request as a “server.” Do note that here the client or the server can be different devices in a network system or can be different processes residing within a single system. RPC is a kind of request-response protocol, which can be easily explained using a client/server communication model. RPC can also be used to set up communication between different processes on a single machine. RPC works on the basis of a client-server communication model, wherein client and server need not always be a different machine. RPC stands for Remote Procedure Call, which utilizes inter-processing communication technology for Windows processes within a network. That way you will have to troubleshoot problems like the RPC server is unavailable error much less often! Before tackling the causes of the error and and ways to fix it, it is essential to first know about RPC in detail.Īlso, if you want to learn more about Windows networking and IT in general, don't forget to sign up for our email updates where we share all of our knowledge and send useful Windows resources. RPC errors, which occur in situations involving communication between two or more machines through a network, are all too common in Windows. If you are a Windows user, there is a high probability you have encountered an “RPC server is unavailable” error.
