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If AES-NI is not supported by the source system where the Agent is installed or the Barracuda Backup device, the data transfer between the Agent and the Barracuda Backup device is not encrypted. If AES-NI is supported by the source system where the Agent is installed, as well as the Barracuda Backup device, the data transfer between the Agent and the Barracuda Backup device is encrypted. By default, the Barracuda Backup Agent and the Barracuda Backup device attempt to communicate over the encrypted connection. AES-NI is used to accelerate data encryption. Encryptionīarracuda leverages the Advanced Encryption Standard-New Instructions (AES-NI) encryption instruction set to perform encryption. If data needs to be restored to an Agent that is currently paired with another Barracuda Backup device, uninstalling and reinstalling the Agent will reset communication. Data can be restored successfully from a Barracuda Backup device to any Backup Agent that it has a trusted relationship with. In cases where the Agent and Backup device trusted relationship must be broken, such as re-configuring an Agent to backup data to a different Barracuda Backup device, uninstalling and reinstalling the Agent will reset communication. This form of authentication between the Agent and the Barracuda Backup device can help prevent potential man-in-the-middle (MITM) attacks. This means that the Agent will only successfully communicate with the Backup device with which it is paired. Once communication has been established between the Agent and the Barracuda Backup device, the Agent and Backup device are paired together.
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The Barracuda Backup Agent uses public key authentication to verify that it is communicating with a valid Barracuda Backup device. The Barracuda Backup Agent uses TLS 1.2 (128-bit AES) to both authenticate with a Barracuda Backup device and encrypt the connection between the Barracuda Backup Agent and the Barracuda Backup device.
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#INSTALL KASEYA AGENT ON LINUX WINDOWS#
The term is a misnomer since the second backup job run against a Windows machine could be running in third-pass if the NTFS USN Journal is usable. Third-pass backups are only possible on computers running Microsoft Windows. Third-Pass Backup (Windows only) – A backup job (or subset of selections within a job) for which the Agent can rely on the NTFS USN Journal to determine which files have been modified since the last backup job. For this reason, Barracuda recommends upgrading your device firmware over a weekend or during a scheduled maintenance period.
#INSTALL KASEYA AGENT ON LINUX VERIFICATION#
The one-time data verification causes increased backup windows. Note that some firmware upgrades require all data sources protected by the Barracuda Backup Agent to undergo a data verification check on the next scheduled backup. Linux backups are always running in second-pass. This happens if it is not possible to determine what files have been modified using the NTFS USN Journal. Second-Pass Backup – A backup job (or a subset of selections within a job) for which the Agent must rescan the source filesystem and check its database to see if a file has been modified since the last backup job. Deduplication still occurs during the job against data parts sent earlier in the job or against parts from other systems being backed up. At the beginning of a first-pass backup, the Barracuda Backup database has no data for the system being backed up and therefore the Barracuda Backup Agent databases are also empty, meaning every file must be sent to the Barracuda Backup device.