CyberHunter
Local dataset, no network
// Other services

Port 388: Unidata LDM

Port 388 is assigned by IANA to unidata-ldm (Unidata LDM).

388

How unidata-ldm works

Other services
client:388unidata-ldmresponse client:388unidata-ldmresponse

The client sends a request to port 388 and the unidata-ldm 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 388 dangerous?

We have no specific security note for port 388. 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 388

ServicePortTransportDescriptionReferenceUpdated
unidata-ldm 388 TCP, UDP Unidata LDM - 2012-05-18

// source: IANA service name and port number registry

03 Check it

Which program uses port 388, and is it reachable?

Linux

sudo ss -ltnup 'sport = :388'      # process listening on 388
sudo lsof -nP -i :388

macOS

sudo lsof -nP -i :388

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 388 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 388
netstat -ano | findstr :388

From another machine

nmap -p 388 -sV <host>
sudo nmap -sU -p 388 <host>
nc -zv <host> 388

Block it in the firewall

sudo ufw deny 388/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 388" -Direction Inbound -LocalPort 388 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 388 used for?

Port 388 is assigned by IANA to unidata-ldm (Unidata LDM).

Is port 388 TCP or UDP?

Port 388 is registered for TCP and UDP.

Is it safe to open port 388?

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 388 is open?

On Linux run "ss -ltnup 'sport = :388'", on macOS "lsof -nP -i :388", and on Windows "netstat -ano | findstr :388" to see the local process. From another machine, "nmap -p 388 <host>" shows whether it is reachable.

05 Related
:4444 Metasploit default / krb524 tcp · udp · high risk :31337 Back Orifice / elite tcp · udp · high risk :1 TCP Port Service Multiplexer tcp · udp :5 Remote Job Entry tcp · udp :9 Discard tcp · udp · sctp · dccp :11 Active Users tcp · udp :17 Quote of the Day tcp · udp :18 Message Send Protocol (historic) tcp · udp

Latest vulnerability news

All news