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// Other services

Port 1405: IBM Remote Execution Starter

Port 1405 is assigned by IANA to ibm-res (IBM Remote Execution Starter).

1405

How ibm-res works

Other services
client:1405ibm-resresponse client:1405ibm-resresponse

The client sends a request to port 1405 and the ibm-res 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 1405 dangerous?

We have no specific security note for port 1405. 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 1405

ServicePortTransportDescriptionReferenceUpdated
ibm-res 1405 TCP, UDP IBM Remote Execution Starter - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1405, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1405'      # process listening on 1405
sudo lsof -nP -i :1405

macOS

sudo lsof -nP -i :1405

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1405 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1405
netstat -ano | findstr :1405

From another machine

nmap -p 1405 -sV <host>
sudo nmap -sU -p 1405 <host>
nc -zv <host> 1405

Block it in the firewall

sudo ufw deny 1405/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1405" -Direction Inbound -LocalPort 1405 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1405 used for?

Port 1405 is assigned by IANA to ibm-res (IBM Remote Execution Starter).

Is port 1405 TCP or UDP?

Port 1405 is registered for TCP and UDP.

Is it safe to open port 1405?

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 1405 is open?

On Linux run "ss -ltnup 'sport = :1405'", on macOS "lsof -nP -i :1405", and on Windows "netstat -ano | findstr :1405" to see the local process. From another machine, "nmap -p 1405 <host>" shows whether it is reachable.

05 Related
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