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The file /etc/config/ddns holds the configuration for ddns-scripts package. for ipv4 <code> config service "myddns_ipv4" option service_name "example.org" option domain "yourhost.example.org" option username "your_username" option password "your_password" option interface "wan" option ip_source "network" option ip_network "wan" </code> for ipv6 <code> config service "myddns_ipv6" option use_ipv6 "1" option service_name "example.org" option domain "yourhost.example.org" option username "your_username" option password "your_password" option interface "wan6" option ip_source "network" option ip_network "wan6" </code>