Good day. I'm attempting to configure a Cradlepoint router to successfully register. The router is behind a carrier grade NAT. The options given for DYNDns Clone are:

Custom Server Address: api.dynu.com
Use HTTPS: toggled on and off in test
Hostname: myhostname.dynu.net
Username: myusername
Password: mypassword

This router is connected to Verizon Wireless, and by default they use a carrier grade NAT. Is that possibly preventing the update? WAN to the router is a 100.x.x.x address, but the external IP is a 174.221.x.x address.

Thanks for any ideas at all.