The netcdf-c code uses curl for its underlying http read/write support. Curl has support for specifying passwords for accessing controlled sites. If the site just requires simple username plus password support, then you should be able to insert that into the url in this form: http://username:password@hostname... Let me know if you have problems. =Dennis Heimbigner Unidata =Dennis Heimbigner Unidata Ticket Details =================== Ticket ID: RDL-638701 Department: Support netCDF Priority: Normal Status: Closed