I don't know what DS entry's are / what you mean with DS entry's
you need a complete domain name like .com/.net etc, or just something like ***.domain.com.
If you're looking for the second you can use
www.no-ip.org. It also has a free package. (Don't know if it's good, someone told me about it)
No-IP.com is a leading dynamic DNS service provider. We offer a wide range of services pertaining to your internet presence, from that pesky dynamic IP problem to getting around ISPs who block port 25. All of our services take advantage of our global network of redundant DNS and mail servers peered with tier-1 data centers.
