I did a clean install with PIAF and 1.8 today. Everything works behind my router. Outside extensions can connect if they use the external IP address. However, when outside extensions use the dyndns.ws domain name, they cannot connect to the pbx. I verified that dyndns.ws points to my ip address (in fact, I can access freepbx through the domain name, but external extensions cannot connect. Is there some other setting I need to change in the pbx?