cd    /usr/share/jetty8/.guacamole
vi guacamole.properties  (flat file)

###### guacamole.properties ######
# Hostname and port of guacamole proxy
guacd-hostname: localhost
guacd-port:     4822

# Location to read extra .jar's from
lib-directory:  /usr/share/jetty8/.guacamole

# Authentication provider class
auth-provider: net.sourceforge.guacamole.net.basic.BasicFileAuthenticationProvider

# Properties used by BasicFileAuthenticationProvider
basic-user-mapping: /usr/share/jetty8/.guacamole/user-mapping.xml
######

cd    /usr/share/jetty8/.guacamole
vi user-mapping.xml
###### user-mapping.xml ######
<user-mapping>
    <authorize username="USERNAME" password="PASSWORD">
        <connection name="VNC-Connection">
             <protocol>vnc</protocol>
             <param name="hostname">localhost</param>
             <param name="port">5900</param>
             <param name="password">VNCPASSWORD</param>
       </connection>
    </authorize>
</user-mapping>
######

service jetty restart
http://ipaddress:8080/guacamole