# Configuring ACME with In-Memory Realm

## Overview

This document describes the process to configure ACME responder to use an in-memory realm.

## Configuring ACME Realm

A sample in-memory realm configuration is available at
link:../../../base/acme/realm/in-memory/realm.conf[/usr/share/pki/acme/realm/in-memory/realm.conf].

To use an in-memory realm, copy the sample `realm.conf` into the `/etc/pki/pki-tomcat/acme` folder,
or execute the following command:

----
$ pki-server acme-realm-mod --type in-memory
----

The `realm.conf` should look like the following:

```
class=org.dogtagpki.acme.realm.InMemoryRealm
username=admin
password=Secret.123
```

## See Also

* link:Configuring_ACME_Realm.md[Configuring ACME Realm]
