---
name: "rpyc_classic"
section: "1"
platform: "linux"
package: "python3-rpyc"
version: "6.0.1-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/rpyc_classic"
---

# rpyc\_classic(1)

RPyC classic server

## NAME

rpyc\_classic - RPyC classic server

## SYNOPSIS

**rpyc\_classic** \[*options*\]

## DESCRIPTION

RPyC (pronounced as are-pie-see), or Remote Python Call, is a transparent Python library for symmetrical remote procedure calls, clustering and distributed-computing. RPyC makes use of object-proxying, a technique that employs Python’s dynamic nature, to overcome the physical boundaries between processes and computers, so that remote objects can be manipulated as if they were local.

**rpyc\_classic** is the server component which enables remote access to the local system. The following options are available:

- **--mode** ***MODE***, **-m** ***MODE***

  Select mode of operation. One of **threaded**, **forking**, **stdio**, **oneshot**.

- **--port** ***PORT***, **-p** ***PORT***

  The TCP port which the server listens to. The default is 18812 for unauthenticated instances and 18821 for SSL authenticated ones.

- **--host** ***INTERFACE***

  Bind to network interface *INTERFACE*. The default is **localhost**.

- **--ipv6**

  Enable IPv6.

- **--logfile** ***FILE***

  Write log to *FILE*. If not specified, log output is written to **stderr**.

- **--quiet**, **-q**

  Quiet mode. Only errors will be logged.

### RPyC Registry

A server instance can be registered with a running [**rpyc\_registry**(1)](/rpyc_registry/1.md) for automated service discovery by clients:

- **--registry-type** ***TYPE***

  Connect to the registry via **TCP** or **UDP** (which is the default).

- **--registry-port** ***PORT***

  Connect to the registry on port *PORT*. The default is 18811.

- **--registry-host** ***HOST***

  Connect to the registry at host *HOST*. This is a required option for TCP registries. If no host is specified for UDP, the server will attempt a broadcast via IP 255.255.255.255 to reach any listening registry in the local network.

### SSL Authenticated Mode

The server supports authentication and authorization via SSL certificates.  **WARNING:** While this mode provides a modest amount of security, there are serious shortcomings such as a missing certificate revocation mechanism. Do not rely on this to expose vital infrastructure to the Internet.

You need to specify the following options to enable this mode:

- **--ssl-cafile** ***FILE***

  Read the Certificate Authority (CA) certificate from *FILE*. The CA is used to determine which client certificates are authorized to connect to the server; only client certificates which have been issued by the CA are accepted. **WARNING**: If this option is omitted, the server will allow any client to connect, which is probably not what you want.

- **--ssl-certfile** ***FILEFR***

  Read the SSL server certificate from *FILE*. This certificate is presented to connecting clients to let them verify that the server is genuine.

- **--ssl-keyfile** ***FILE***

  Read the private SSL server key for the server certificate from *FILE*.

## SEE ALSO

[**rpyc\_registry**(1)](/rpyc_registry/1.md)

## AUTHOR

This manual page was written for Debian by Timo Röhling and may be used without restriction.