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File README.SUSE of Package erlang (Revision b836b8cf21bc546d5b2d42bd165d5a32)

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# Erlang in openSUSE
## Erlang Port-mapper Daemon and systemd

Erlang Port-mapper Daemon in openSUSE uses systemd socket-activation. In order to fulfill security considerations, EPMd listens on loop-back interface by default. This is enough to run rabbitmq-server, ejabberd and user-started beam processes.

For clustering, please, use ```/etc/systemd/system/epmd.socket.d/``` to configure interfaces to listen on. See man systemd.unit(5) for details.

### Upgrading from sysvinit
```/etc/sysconfig/erlang``` has no effect now, to configure EPMd use systemd capabilities instead.

### Example 1: change port
Create ```/etc/systemd/system/epmd.socket.d/port.conf``` with following content:
```
[Socket]
ListenStream=
ListenStream=127.0.0.1:4444
```
The first line is to discard vendor configuration. The second line will change the port number to listen on to 4444.

### Example 2: enable external interface
To enable accepting external connections to EPMd, create ```/etc/systemd/system/epmd.socket.d/port.conf``` with following content:
```
[Socket]
ListenStream=
ListenStream=0.0.0.0:4369
```

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File README.SUSE of Package erlang (Revision b836b8cf21bc546d5b2d42bd165d5a32)

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