How do I use Dynamic DNS with Asterisk@Home
You need to edit the sip_nat.conf file. Inside of AMP, click Maintenance ----> Config Edit ----> sip_nat.conf. Inside of sip_nat.conf add the following and click "Update":
externip = home.mydomain.com (Enter your DynamicDNS domain name. Obviously it's just easier to get a static IP address and avoid using DynamicDNS altogether.)
If you are using a dynamic dns domain name, you should rather use:
externhost = home.mydomain.com
externrefresh = 5 (which means lookup hostname every 5 minutes to refresh ip adress)
localnet = internal.network.address.0/255.255.255.0 (put your LAN/Private NETWORK address of your Asterisk@Home server, this is NOT the IP address of the server!!!!)
To determine your local NETWORK address (NOT the IP address!!) you have to know a little about your subnet mask (255.255.255.0 numbers).
If the IP address of the Asterisk@Home server is 192.168.1.5 255.255.255.0, then the NETWORK address is 192.168.1.0
If the IP address of the Asterisk@Home server is 192.168.7.2 255.255.255.0, then the NETWORK address is 192.168.7.0
If the IP address of the Asterisk@Home server is 192.168.100.84 255.255.255.0, then the NETWORK address is 192.168.100.0