Perhaps you mean how to do dynamic dns updates? There's lots of info and i think some examples in: http://www.pop-uc.rcts.pt/mirrors/dnsrd/ -- N a t h a n O . S i e m e r s Bioinformatics Division of Applied Genomics Bristol-Myers Squibb Pharmaceutical Research Institute Hopewell Building 3B, P.O. Box 5400, Princeton, NJ 08543-5400 609 818-6568 siemersn@bms.com