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// Other services

Port 385: IBM Application

Port 385 is assigned by IANA to ibm-app (IBM Application).

385

How ibm-app works

Other services
client:385ibm-appresponse client:385ibm-appresponse

The client sends a request to port 385 and the ibm-app 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
Well-known (0-1023)
Category
Other services
01 Security

Is port 385 dangerous?

We have no specific security note for port 385. 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 385

ServicePortTransportDescriptionReferenceUpdated
ibm-app 385 TCP, UDP IBM Application - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 385, and is it reachable?

Linux

sudo ss -ltnup 'sport = :385'      # process listening on 385
sudo lsof -nP -i :385

macOS

sudo lsof -nP -i :385

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 385 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 385
netstat -ano | findstr :385

From another machine

nmap -p 385 -sV <host>
sudo nmap -sU -p 385 <host>
nc -zv <host> 385

Block it in the firewall

sudo ufw deny 385/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 385" -Direction Inbound -LocalPort 385 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 385 used for?

Port 385 is assigned by IANA to ibm-app (IBM Application).

Is port 385 TCP or UDP?

Port 385 is registered for TCP and UDP.

Is it safe to open port 385?

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 385 is open?

On Linux run "ss -ltnup 'sport = :385'", on macOS "lsof -nP -i :385", and on Windows "netstat -ano | findstr :385" to see the local process. From another machine, "nmap -p 385 <host>" shows whether it is reachable.

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