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Air-Gapped Backups

# Air-Gapped Backups

Overview

In the realm of data security, particularly for critical infrastructure like dedicated servers, the concept of *Air-Gapped Backups* stands as a cornerstone of robust disaster recovery and protection against increasingly sophisticated cyber threats. An air-gapped backup is a copy of data that is physically and logically isolated from any network, including the internet and local area networks. This isolation is the defining characteristic, providing a powerful defense against ransomware, malware, and unauthorized access. Unlike traditional backup methods that rely on network connectivity, air-gapped backups require manual transfer of data to the backup medium – typically tape, optical media, or a physically isolated hard drive – and subsequent physical disconnection from all networks.

The increasing prevalence of ransomware attacks targeting SSD Storage and other critical infrastructure highlights the importance of air-gapped backups. Even if a primary system and networked backups are compromised, the air-gapped copy remains secure, allowing for a clean recovery without paying a ransom or risking further data loss. This article will detail the specifications, use cases, performance considerations, and pros and cons of implementing air-gapped backups, particularly within the context of a Dedicated Servers environment. The term "Air-Gapped Backups" will be central throughout this discussion. We will also cover how these backups interact with broader Data Center Security measures.

Specifications

Implementing air-gapped backups involves several key components and configurations. The specifications below outline the requirements for a reliable and secure air-gapped backup system.

Component Specification Details
Backup Medium LTO-9 Tape Current industry standard; offers high capacity (up to 45TB native) and long archival life (30+ years). Requires a compatible tape drive.
Backup Medium Optical Discs (Blu-ray) Suitable for smaller datasets; relatively inexpensive and portable. Limited capacity compared to tape. Consider Data Redundancy for reliability.
Backup Medium Physically Isolated Hard Drive Requires a dedicated hard drive, disconnected from the network after backup. Consider encryption at rest. Important to manage physical security.
Backup Software Veeam Backup & Replication Supports backup to tape and disk; provides features like compression and encryption. Requires careful configuration to ensure air-gap integrity.
Backup Software Bacula Open-source network backup solution that can be adapted for air-gapped backups with manual media handling.
Encryption AES-256 Essential for protecting data at rest on the backup medium. Requires key management procedures. Refer to Encryption Standards for details.
Air-Gapped Backups Frequency Weekly/Monthly Depends on Recovery Point Objective (RPO) and the rate of data change. More frequent backups offer faster recovery but increase complexity.
Verification Regular Restore Tests Crucial to ensure the integrity and recoverability of the backup. Should be performed at least quarterly. Relates to Disaster Recovery Planning.

Air-Gapped Backups rely on physical isolation. The specification tables above show that tape is the most common method, but any method can be used as long as the physical isolation is maintained. The choice of backup software should also consider the ability to handle large datasets and provide robust encryption features.

Use Cases

Air-gapped backups are particularly valuable in scenarios where data integrity and availability are paramount.

⚠️ *Note: All benchmark scores are approximate and may vary based on configuration. Server availability subject to stock.* ⚠️

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