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// Other services

Port 9085: IBM Remote System Console

Port 9085 is assigned by IANA to ibm-rsyscon (IBM Remote System Console).

9085

How ibm-rsyscon works

Other services
client:9085ibm-rsysconresponse client:9085ibm-rsysconresponse

The client sends a request to port 9085 and the ibm-rsyscon 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
Registered (1024-49151)
Category
Other services
01 Security

Is port 9085 dangerous?

We have no specific security note for port 9085. 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 9085

ServicePortTransportDescriptionReferenceUpdated
ibm-rsyscon 9085 TCP, UDP IBM Remote System Console - 2008-06-18

// source: IANA service name and port number registry

03 Check it

Which program uses port 9085, and is it reachable?

Linux

sudo ss -ltnup 'sport = :9085'      # process listening on 9085
sudo lsof -nP -i :9085

macOS

sudo lsof -nP -i :9085

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 9085 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 9085
netstat -ano | findstr :9085

From another machine

nmap -p 9085 -sV <host>
sudo nmap -sU -p 9085 <host>
nc -zv <host> 9085

Block it in the firewall

sudo ufw deny 9085/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 9085" -Direction Inbound -LocalPort 9085 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 9085 used for?

Port 9085 is assigned by IANA to ibm-rsyscon (IBM Remote System Console).

Is port 9085 TCP or UDP?

Port 9085 is registered for TCP and UDP.

Is it safe to open port 9085?

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 9085 is open?

On Linux run "ss -ltnup 'sport = :9085'", on macOS "lsof -nP -i :9085", and on Windows "netstat -ano | findstr :9085" to see the local process. From another machine, "nmap -p 9085 <host>" shows whether it is reachable.

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