In this iteration of the backup rule, one backup copy should be made immutable or air-gapped. Consider keeping an air-gapped backup offsite on a dedicated NAS device, detachable disks, or tape. You may need to put additional effort and time into creating and updating such backups, but they can provide enhanced recoverability in a worst-case scenario.

The majority of cyberthreats, from regular phishing emails to the most advanced malware, spread out through the internet. An air-gapped backup stays in the safe zone with the main infection channel disabled. Such secret backup storage is a reliable resource that can be your last line of defense during major data loss incidents.

Creating a logical air gap means separating nodes and networks with specialized software, such as firewalls, traffic management systems, RBAC (role-based access control), and encryption algorithms. In logically air-gapped environments, a physical connection is still present to provide more opportunities for data operation.

If you have a toilet with a tank on the back in your home or business, it contains a valve to fill the tank every time you flush. The fill valve, or “ballcock,” is equipped with an approved backflow prevention device that prevents any water in the tank from being siphoned back into the pipes of your house (anti-siphon). Plumbing codes require all water outlets to be equipped with a backflow prevention device to prevent contamination or pollution of the drinking water.

For example, you can make NAS backups immutable to protect data from alteration, encryption, or deletion. Or you can disconnect that NAS device with backup data from your main environment to create an air gap. You can also send backup copies to tape and disconnect the tape media from the backup system.

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Organizations looking for ways to maintain data reliability and regulatory compliance in the face of emerging cyberthreats have several measures that they can implement. These measures can include air gapping to bolster their data protection strategies. Read this blog to learn what an air-gapped backup is and how you can use it to add another layer of protection for your data.

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The implementation of air gaps may vary depending on the needs and objectives of your infrastructure. Some organizations transfer data to and from air-gapped environments via detachable drives. Others switch on secure connections that were established specifically for operations with air-gapped data. The concept remains the same in all cases – air gapping helps set strict access limitations for particular devices and networks.

NAKIVO Backup & Replication is a versatile solution that provides onsite, offsite, cloud, NAS, and tape backup, along with advanced data protection functionality. You can use the solution for virtual environments like VMware vSphere, Microsoft Hyper-V, Nutanix AHV, Proxmox VE, as well as for Windows and Linux physical environments.

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Backflow prevention assemblies can reduce or eliminate backflows by segregating drinking and non-potable water piping.

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Air gapping can be an effective data protection measure, but it is not perfect by default. Although there are undisputed advantages in air-gapped data, a closer look also reveals some disadvantages.

A physically air-gapped server, for example, has no WAN or LAN connection interfaces. In such a case, establishing a remote connection with that server by accident or deliberately with malicious intent is impossible. Additionally, this standalone air-gapped environment can stay secure and stable if an emergency occurs at the main site or data center.

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Air-gapped is a security measure that involves isolating a computer, storage device or network to prevent it from establishing external connections. The main idea behind air gapping is restriction of access. In order to work with data in an air-gapped system, you need to gain physical access to the device running that system.

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All hose bibs (sillcocks) are required by code to have a special backflow prevention device installed called a hose connection vacuum breaker. This device prevents water in the hose from flowing backward into the pipes of your house.

In other types of commercial and industrial businesses, it is necessary to ensure the safety of Fairfax Water’s potable water system by requiring the installation of backflow prevention assemblies in the main water-service line to certain types of buildings. The types of backflow prevention devices installed at these locations can range in size from ¾ inch to 10 inches in diameter and cost anywhere from a couple hundred dollars to tens of thousands of dollars to purchase and install.

You can consider logical air gapping as a trade-off between security and convenience. Logically air-gapped nodes can be located at a different site, like with the physical air gap approach, to achieve added resilience against insider threats and emergencies. Additionally, a logical air gap can work as a network segmentation approach, providing extra security for sensitive data.

Therefore, all sinks have a space between the end of the faucet and the flood level of the sink called an air gap. Some sinks typically found in commercial businesses, such as a mop sink, are equipped with a backflow prevention device called an atmospheric vacuum breaker installed on the faucet.

Isolation is another air gapping approach that involves detaching a system from other systems and the internet yet without moving your hardware away. This helps you avoid unauthorized access to isolated environments from outside an organization’s office. Still, disasters such as fire, flood, or power outage can damage both your production and air-gapped environments.

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Cybercriminals target backups along with production infrastructures when planning their attacks to improve the chances of the victim paying the ransom. Losing recovery copies due to ransomware encryption, for example, can leave an organization with no means to independently restore systems and availability. Alternatively, the deletion of backups along with production data can, in some cases, lead to irreparable damage.

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The NAKIVO solution for air-gapped backups enables you to run custom backup workflows by schedule or on demand to shorten backup windows. Lastly, you can set flexible recovery sequences and then, when a data loss occurs, initiate them in a few clicks to ensure minimal RTOs.

Physical air gapping means disconnecting a device from other nodes or networks. Without cable or wireless connections, an air-gapped machine becomes unreachable from other environments. Moreover, a “true” physical air gap involves moving hardware to a different location away from production sites.

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Cloud backups have increasingly become the answer to the third point of the rule in recent years. However, hackers have come up with ransomware such as LockBit and other malware to specifically target cloud-based environments. The 3-2-1 rule evolved in response to the growing vulnerability of offsite backups, becoming the 3-2-1-1 rule.

In 2023, NCC Group reported 84% more ransomware attacks with 4,677 incidents versus 2,531 in 2022. This was the biggest number they had ever recorded. With cyberthreats becoming more sophisticated, more frequent, and stealthier, it is clear that cyber protection methods have to keep up.

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