We just replaced our ailing backup server for laptops and lab PCs inplace with new, more performant hardware using the same proven BackupPC software, just a newer version. Its web-interface is available under the same URL.
The new server will start making backups from scratch for every host. Backups on the old server will still be available for a while at the address https://backuppc-old.phys.ethz.ch/.
Our old backup server became a victim of its own success. In the end it handled backups for over 100 hosts every day (over 160 during its whole life-time) and stored about 10 Terabytes of backups.
The BackupPC server of the Institute for Astronomy is not affected.