Our test hosts are 1 GHz Intel PIII machines with 256 MB of memory and 10 GB Western Digital Protege IDE hard drives. In the two-host, client-server tests that explore the network performance of our system, we connect our machines with 100 Mbps Ethernet. We did not use IPsec for the measurements, because results would vary considerably depending on the specific IPsec configuration parameters. For an evaluation of the performance impact of using IPsec in various configurations we refer the reader to . In the following tables, FFS means measurements taken on the local file system. NFSv2 and NFSv3 denote measurements over NFS protocol versions 2 and 3 respectively using the UDP protocol. We did not measure our performance when running over TCP.