BackupPC is a fast, enterprise-grade backup system. It provides a web-based user interface. It supports several platforms (Unix-like, Windows, MacOSX) to backup to a disk-based storage. No client-side software is necessary, as the BackupPC server uses several protocols (smb, rsync, tar and ftp) native to the client OS. File-level deduplication combined with optional compression minimizes the disk space needed to store the backups and disk I/O and enables synthetic backups to reduce network traffic. BackupPC is not a block-level backup system but performs file-based backup and restore. Thus it is not suitable for backup of disk images or raw disk partitions. BackupPC supports laptop environments with clients on dynamic IP addresses (DHCP) not always connected to the network. WWW: http://backuppc.sourceforge.net/