Hi all, I didn't want to derail the phone conversation, but there's a guy within the UK GridPP project (Andrew McNab) who has a mechanism (and software) for doing 3rd party replicatation with HTTP. The details are available from the following link, page 8 onward. He uses http for the bulk transfer and https for the delegation and control parts, but in principle all transfers can be http or https. http://www.gridpp.ac.uk/meetings/chep06/gridsite-mcnab-15feb06.pdf Cheers, Paul.