DnsLibrary 

The DNS Library is a COM component that makes dynamic DNS updates to RFC-2136-compatible DNS servers possible from any scripting languages in an easy way. For secure updates, HMAC-MD5 and GSS-TSIG are supported.
dynamic dns server script secure kerberos gss tsig hmac md5 ntlm bind basic authentication

DynSite 

DynSite automatically updates your dynamic IP address each time it changes on one or many dynamic DNS or by email. This allows anyone to connect to the servers running on your own computer using a fully qualified domain name.
dynamic dns service client automatic ip update shareware template multilingual template rras ldap smtp