CyberHunter
Local dataset, no network
// Other services

Port 860: iSCSI

Port 860 is assigned by IANA to iscsi (iSCSI).

860

How iscsi works

Other services
client:860iscsiresponse client:860iscsiresponse

The client sends a request to port 860 and the iscsi service answers.

Transport
TCP · UDP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned1 registered service
Range
Well-known (0-1023)
Category
Other services
01 Security

Is port 860 dangerous?

We have no specific security note for port 860. Its risk depends on the program actually listening on it. General advice for other services services:

  • Close the port if nothing on the host needs it.
  • Identify the process that listens on it (commands below) before opening it in a firewall.
  • Expose a service only to the networks that use it.
02 Registry

IANA registry entries for port 860

ServicePortTransportDescriptionReferenceUpdated
iscsi 860 TCP, UDP iSCSI RFC 7143 2013-08-27

// source: IANA service name and port number registry

03 Check it

Which program uses port 860, and is it reachable?

Linux

sudo ss -ltnup 'sport = :860'      # process listening on 860
sudo lsof -nP -i :860

macOS

sudo lsof -nP -i :860

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 860 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 860
netstat -ano | findstr :860

From another machine

nmap -p 860 -sV <host>
sudo nmap -sU -p 860 <host>
nc -zv <host> 860

Block it in the firewall

sudo ufw deny 860/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 860" -Direction Inbound -LocalPort 860 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 860 used for?

Port 860 is assigned by IANA to iscsi (iSCSI).

Is port 860 TCP or UDP?

Port 860 is registered for TCP and UDP.

Is it safe to open port 860?

It depends on the program that listens on it. Open it only for a service you know and only to the networks that need it. Close the port if nothing on the host needs it.

How do I check if port 860 is open?

On Linux run "ss -ltnup 'sport = :860'", on macOS "lsof -nP -i :860", and on Windows "netstat -ano | findstr :860" to see the local process. From another machine, "nmap -p 860 <host>" shows whether it is reachable.

05 Related
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