The following link provides a brief introduction about how Dyn DNS works and a list of Dynamic DNS providers . Some of them are free, some charge a minimal rate:Link 1Link 2Link 3
Hope this helps.
MVP (Enterprise Security), ISLA-2010 (ISC)², C|EH, C|HFI, CCNA, MCP,
Certified ISO 27001:2005 Lead Auditor
[b]There are 3 roads to spoil; women, gambling & hacking. The most pleasant with women, the quickest with gambling, but the surest is hacking - c0c0n