iSCSI

iSCSI (Internet Small Computer Systems Interface) is a protocol used to link data storage facilities. It allows clients to send SCSI commands to storage devices over IP networks. This enables the consolidation of storage into data centers while providing hosts with the illusion of locally attached disks.

What is iSCSI

iSCSI (Internet Small Computer Systems Interface) is a network protocol that allows for the transport of block-level data between an iSCSI initiator on a client and an iSCSI target on a storage device over IP networks. Developed by the Internet Engineering Task Force (IETF), iSCSI is used to facilitate data transfers over intranets and to manage storage over long distances.

iSCSI works by encapsulating SCSI commands into IP packets, which are then transmitted over the network. This allows for the creation of storage area networks (SANs) using existing network infrastructure, making it a cost-effective solution for organizations looking to centralize their storage resources. The protocol supports various authentication and encryption methods to ensure data security during transmission.

One of the key advantages of iSCSI is its ability to leverage existing Ethernet networks, reducing the need for specialized hardware. This makes it an attractive option for small to medium-sized enterprises that require robust storage solutions without the high costs associated with traditional SAN technologies. Additionally, iSCSI's compatibility with various operating systems and virtualization platforms further enhances its versatility and ease of deployment.

iSCSI runs on TCP and UDP port 860 and is official IANA port.

Security risk

If port 860 is open and the iSCSI service is running, it could be a target for unauthorized access or data breaches. Attackers could potentially intercept or manipulate data being transmitted over the network. Proper authentication, encryption, and firewall rules are essential to mitigate these risks.

In our UFW tutorial you can follow instructions how you can configure UFW to close port 860. Use StackChanges to monitor if the iSCSI port is closed and stays closed. StackChanges will send an alert if port 860 is open again.