public String getRadiusServer() throws GuacamoleException {
        return environment.getProperty(
            RadiusGuacamoleProperties.RADIUS_HOSTNAME,
            "localhost"
        );
    }
Returns the hostname of the RADIUS server as configured with
guacamole.properties. By default, this will be "localhost".

@return
    The hostname of the RADIUS server, as configured with
    guacamole.properties.

@throws GuacamoleException
    If guacamole.properties cannot be parsed.
extensions/guacamole-auth-radius/src/main/java/org/apache/guacamole/auth/radius/conf/ConfigurationService.java