I haven't been able to connect to my VPN, recently and did some investigating. If I check my HubDNS account my tklapp.com address is correctly being displayed as my router's WAN IP address. What's weird is if I ping my tklapp.com address, it returns an IP address that according to WHOIS, is an Amazon ECS address. Any ideas...?
PS: Just for the hell of it, I changed my VPN client configuration to point to my router's WAN IP address and it connected right away. So this really is a DDNS not working.