@Clive_A Thank your for your response and the info that you do not support DDNS for the failover group. I disagree this is a network issue. Others, such as Asus and Pfsense, support it, so I will...

I just bought an ER605. I have it set up as a double WAN failover. The first line is FIOS, and if it goes down, I have a cable backup provider. Both networks have a public - non-static - IP. I found...