Verizon Fios User Manual page 150

DnS SEttingS
When using Dynamic DNS, each time the public IP address
changes, the DNS database is automatically updated with the new
IP address. In this way, even though the IP address changes often,
the domain name remains constant and accessible.
To set up dynamic DNS:
1. Select Dynamic DNS Dynamic DNS in the DNS
2. To set up a new entry, click the Add
DNS section.
Add button.