iSCSI — raw SCSI block storage over TCP, the port every SAN target listens on.
TCP 3260 is the IANA-registered iSCSI target port from RFC 7143: initiators open a session, log in with a target IQN and then issue SCSI commands over TCP, treating a remote LUN as a local disk. Every common target implementation defaults here — Linux LIO, tgt, NetApp, Synology and QNAP appliances, and cloud block-storage gateways. On a scan it means someone's disks are on the network, and an unauthenticated target will hand its LUN list to anyone who asks.
Do not expose
iSCSI carries block data in cleartext and its CHAP authentication is optional and weak; put it on a dedicated storage VLAN, never on a routed or public interface.
$ iscsiadm -m discovery -t sendtargets -p TARGET:3260Seen this on your network? Beige Box scans your Wi-Fi and shows every open port on every device — and its Ports tool links straight back here.
Get Beige Box →also available as JSON · Markdown
Corrections or a missing port? Reply @rimrocksystems.