<realm> – Element specifying the class defining the security realm. If a class is not specified, com.tc.net.core.security.ShiroIniRealm is used.

<url> – The URI for the Realm configuration (.ini) file. It is passed to the realm class to specify authentication file. Alternatively, URIs for LDAP or Microsoft Active directory can also be used if one of these schemes is implemented instead.

<user> – The username that represents the server and is authenticated by other servers. This name is part of the credentials stored in the .ini file. The default value is "terracotta".