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// Other services

Port 1597: orbplus-iiop

Port 1597 is assigned by IANA to orbplus-iiop (orbplus-iiop).

1597

How orbplus-iiop works

Other services
client:1597orbplus-iiopresponse client:1597orbplus-iiopresponse

The client sends a request to port 1597 and the orbplus-iiop 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 1597 dangerous?

We have no specific security note for port 1597. 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 1597

ServicePortTransportDescriptionReferenceUpdated
orbplus-iiop 1597 TCP, UDP orbplus-iiop - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1597, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1597'      # process listening on 1597
sudo lsof -nP -i :1597

macOS

sudo lsof -nP -i :1597

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1597 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1597
netstat -ano | findstr :1597

From another machine

nmap -p 1597 -sV <host>
sudo nmap -sU -p 1597 <host>
nc -zv <host> 1597

Block it in the firewall

sudo ufw deny 1597/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1597" -Direction Inbound -LocalPort 1597 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1597 used for?

Port 1597 is assigned by IANA to orbplus-iiop (orbplus-iiop).

Is port 1597 TCP or UDP?

Port 1597 is registered for TCP and UDP.

Is it safe to open port 1597?

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 1597 is open?

On Linux run "ss -ltnup 'sport = :1597'", on macOS "lsof -nP -i :1597", and on Windows "netstat -ano | findstr :1597" to see the local process. From another machine, "nmap -p 1597 <host>" shows whether it is reachable.

05 Related
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