No-ip Dynamic DNS update not working with some hosts.

After working with No-ip to troubleshoot the issue, they had me try adding "-." to the begining of the url. This worked. For example, in my case, I am using a delegated subdomain so the string is "-.vpn.mydomain.com". Hopefully this will work for you. Aparently this is an issue in the version of No-ip's Linux dynamic update client that Netgear used. It woulds like something that No-ip has to fix and then Netgear has to incorporate in their software. No ETA is available for a fix but at least there is this workaround.