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// Other services

Port 3267: IBM Dial Out

Port 3267 is assigned by IANA to ibm-dial-out (IBM Dial Out).

3267

How ibm-dial-out works

Other services
client:3267ibm-dial-outresponse client:3267ibm-dial-outresponse

The client sends a request to port 3267 and the ibm-dial-out 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 3267 dangerous?

We have no specific security note for port 3267. 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 3267

ServicePortTransportDescriptionReferenceUpdated
ibm-dial-out 3267 TCP, UDP IBM Dial Out - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 3267, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3267'      # process listening on 3267
sudo lsof -nP -i :3267

macOS

sudo lsof -nP -i :3267

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3267 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3267
netstat -ano | findstr :3267

From another machine

nmap -p 3267 -sV <host>
sudo nmap -sU -p 3267 <host>
nc -zv <host> 3267

Block it in the firewall

sudo ufw deny 3267/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3267" -Direction Inbound -LocalPort 3267 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3267 used for?

Port 3267 is assigned by IANA to ibm-dial-out (IBM Dial Out).

Is port 3267 TCP or UDP?

Port 3267 is registered for TCP and UDP.

Is it safe to open port 3267?

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 3267 is open?

On Linux run "ss -ltnup 'sport = :3267'", on macOS "lsof -nP -i :3267", and on Windows "netstat -ano | findstr :3267" to see the local process. From another machine, "nmap -p 3267 <host>" shows whether it is reachable.

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