Proxmox Backup Server 3.1 Now Available

Proxmox, a company known for developing Proxmox Virtual Environment and Proxmox Mail Gateway, has announced the release of the distribution Proxmox Backup Server 3.1. This distribution is a ready-made solution for backup copying and recovery of virtual environments, containers, and server data. The installation ISO-image is available for free download. The components specific to the distribution are open under the AGPLV3 license. Users have the option to install updates from the paid Enterprise repository or two free repositories, which differ in the level of updates stabilization.

The distribution is based on the DEBIAN and OpenZFS package base. The backup management software is written in RUST and supports incremental backups, deduplication, compression using ZSTD, and encryption of backup copies. Proxmox Backup Server can be used locally or as a centralized server for backup data from different hosts. It offers quick selective restoration and data synchronization between servers.

Proxmox Backup Server integrates with the Proxmox VE platform for backup copying of virtual machines and containers. All backup copies and data recovery can be controlled through the web interface. User access can be managed to protect data. Traffic from clients to the server is encrypted using AES-256 in GCM mode, and the backup copies are transmitted already encrypted using asymmetric encryption. The integrity of backups is ensured using Hashee Hashee.

In the new release of Proxmox Backup Server 3.1, the following updates and features have been included:

  • Synchronization with Debian 12.2 package base. The Linux kernel has been updated to version 6.5. The implementation of the ZFS file system has been updated to OpenZFS 2.2.0 with bug fixes from the 2.2.2 branch.
  • Added support for verified boot in UEFI Secure Boot mode, ensuring the use of only components with correct digital signatures during boot. A SIM-loader certified by a digital signature is provided for UEFI Secure Boot.
  • Added support for local synchronized works (Sync-Jobs), allowing for the copying of snapshots with backups between multiple local storages. This mode allows for configurations that store backup copies on fast storage first and then transfer them to slower storage for long-term archiving purposes.
/Reports, release notes, official announcements.