FreePbx in DynDNS

I have freepbx running ok in intranet. I have a dyndns host to remote access. Please,

What I need configure in my route (dir 825) to have public access to freepbx ??? Whal port I use ??? Where I configure this in Freepbx Gui ???

HELP

This commercial module will do what you are looking for: http://schmoozecom.com/sys-admin-pro.php

Will I have to pay for it? There’s no other way??

Module Administration
Errors with selection:

System Admin cannot be installed:
    PHP Component Zend Guard Loader is required but missing from you PHP installation.
    File /usr/sbin/incrond must exist.
Please try again after the dependencies have been installed.

i try install system admin module and I have upper error

heLP

http://wiki.freepbx.org/display/FCM/Asterisk+Now+and+Other+FreePBX+System

I don’t have asterisk now installed. I have raspbx (arm - raspberry pi)

help

sysadmin will not work on debian, you will want to search for some dyndns packages for your OS, as there will not be a specific package from FreePBX to support raspberry pi.

http://letmegooglethatforyou.com/?q=how+to+setup+dyndns+on+debian