Port 3260 (iSCSI)

iSCSI block storage targets (SANs, NAS LUNs, Proxmox and VMware storage).

Registered (user) port, 1024-49151 TCP File transfer and storage Do not expose to the internet

What port 3260 is used for

iSCSI block storage targets (SANs, NAS LUNs, Proxmox and VMware storage).

Security: should port 3260 be open?

Do not expose to the internet. Keep on a dedicated storage network; anyone who can log in to a target gets raw disk access. Use CHAP and initiator ACLs.

IANA assignment

Service nameProtoDescriptionAssigneeReference

iscsi-target TCP iSCSI port IESG RFC 7143

iscsi-target UDP iSCSI port IESG RFC 7143

Registry dates for this port: last modified 2013-08-27.

Check what is listening on port 3260

Linux: is anything listening on TCP 3260?

sudo ss -tlnp 'sport = :3260'

Linux / macOS: which process owns the port

sudo lsof -nP -i :3260

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':3260 '

Windows (Command Prompt)

netstat -ano | findstr :3260

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3260 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine

nc -vz -w 5 HOST 3260

From Windows

Test-NetConnection HOST -Port 3260

Block port 3260 in the firewall

ufw

sudo ufw deny 3260/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 3260 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 3260 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 3260' -Direction Inbound -Protocol TCP -LocalPort 3260 -Action Block

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Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.