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// Other services

Port 600: Sun IPC server

Port 600 is assigned by IANA to ipcserver (Sun IPC server).

600

How ipcserver works

Other services
client:600ipcserverresponse client:600ipcserverresponse

The client sends a request to port 600 and the ipcserver 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 600 dangerous?

We have no specific security note for port 600. 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 600

ServicePortTransportDescriptionReferenceUpdated
ipcserver 600 TCP, UDP Sun IPC server - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 600, and is it reachable?

Linux

sudo ss -ltnup 'sport = :600'      # process listening on 600
sudo lsof -nP -i :600

macOS

sudo lsof -nP -i :600

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 600 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 600
netstat -ano | findstr :600

From another machine

nmap -p 600 -sV <host>
sudo nmap -sU -p 600 <host>
nc -zv <host> 600

Block it in the firewall

sudo ufw deny 600/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 600" -Direction Inbound -LocalPort 600 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 600 used for?

Port 600 is assigned by IANA to ipcserver (Sun IPC server).

Is port 600 TCP or UDP?

Port 600 is registered for TCP and UDP.

Is it safe to open port 600?

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 600 is open?

On Linux run "ss -ltnup 'sport = :600'", on macOS "lsof -nP -i :600", and on Windows "netstat -ano | findstr :600" to see the local process. From another machine, "nmap -p 600 <host>" shows whether it is reachable.

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