Nextcloud aims to ship with secure defaults that do not need to get modified by administrators. However, in some cases some additional security hardening can be applied in scenarios were the administrator has complete control over the Nextcloud instance. This page assumes that you run Nextcloud Server on Apache2 in a Linux environment. Nextcloud will warn you in the administration interface if some critical security-relevant options are missing. However, it is still up to the server administrator to review and maintain system security. Nextcloud uses the bcrypt algorithm, and thus for security and performance reasons, e. Denial of Service as CPU demand increases exponentially, it only verifies the first 72 characters of passwords. This applies to all passwords that you use in Nextcloud: user passwords, passwords on link shares, and passwords on external shares. This means that when generating a random number Nextcloud will request multiple random numbers from different sources and derive from these the final random number.
Use the PDF Version for printing. Administration Manual for UrBackup Server 2. Image backup fails postimagebackup Called if a image backup successfully finished No parameters Ignored. Settings Description Default value Interval for incremental file backups The server will start incremental file backups in such intervals. If the number of incremental file backups exceeds this number the server will start deleting old incremental file backups. If the server ran out of backup storage space the server can delete incremental file backups until this minimal number is reached. If deleting a backup would cause the number of incremental file backups to be lower than this number it aborts with an error message. If the number of full file backups exceeds this number the server will start deleting old full file backups. If the server ran out of backup storage space the server can delete full file backups until this minimal number is reached. If deleting a backup would cause the number of full file backups to be lower than this number it aborts with an error message.