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// Other services

Port 1934: IBM LM Appl Agent

Port 1934 is assigned by IANA to xaapi (IBM LM Appl Agent).

1934

How xaapi works

Other services
client:1934xaapiresponse client:1934xaapiresponse

The client sends a request to port 1934 and the xaapi 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 1934 dangerous?

We have no specific security note for port 1934. 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 1934

ServicePortTransportDescriptionReferenceUpdated
xaapi 1934 TCP, UDP IBM LM Appl Agent - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1934, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1934'      # process listening on 1934
sudo lsof -nP -i :1934

macOS

sudo lsof -nP -i :1934

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1934 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1934
netstat -ano | findstr :1934

From another machine

nmap -p 1934 -sV <host>
sudo nmap -sU -p 1934 <host>
nc -zv <host> 1934

Block it in the firewall

sudo ufw deny 1934/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1934" -Direction Inbound -LocalPort 1934 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1934 used for?

Port 1934 is assigned by IANA to xaapi (IBM LM Appl Agent).

Is port 1934 TCP or UDP?

Port 1934 is registered for TCP and UDP.

Is it safe to open port 1934?

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 1934 is open?

On Linux run "ss -ltnup 'sport = :1934'", on macOS "lsof -nP -i :1934", and on Windows "netstat -ano | findstr :1934" to see the local process. From another machine, "nmap -p 1934 <host>" shows whether it is reachable.

05 Related
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