CyberHunter
Local dataset, no network
// Other services

Port 1543: simba-cs

Port 1543 is assigned by IANA to simba-cs (simba-cs).

1543

How simba-cs works

Other services
client:1543simba-csresponse client:1543simba-csresponse

The client sends a request to port 1543 and the simba-cs 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 1543 dangerous?

We have no specific security note for port 1543. 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 1543

ServicePortTransportDescriptionReferenceUpdated
simba-cs 1543 TCP, UDP simba-cs - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1543, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1543'      # process listening on 1543
sudo lsof -nP -i :1543

macOS

sudo lsof -nP -i :1543

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1543 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1543
netstat -ano | findstr :1543

From another machine

nmap -p 1543 -sV <host>
sudo nmap -sU -p 1543 <host>
nc -zv <host> 1543

Block it in the firewall

sudo ufw deny 1543/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1543" -Direction Inbound -LocalPort 1543 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1543 used for?

Port 1543 is assigned by IANA to simba-cs (simba-cs).

Is port 1543 TCP or UDP?

Port 1543 is registered for TCP and UDP.

Is it safe to open port 1543?

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 1543 is open?

On Linux run "ss -ltnup 'sport = :1543'", on macOS "lsof -nP -i :1543", and on Windows "netstat -ano | findstr :1543" to see the local process. From another machine, "nmap -p 1543 <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

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