CyberHunter
Local dataset, no network
// Other services

Port 8043: FireScope Server

Port 8043 is assigned by IANA to fs-server (FireScope Server).

8043

How fs-server works

Other services
client:8043fs-serverresponse client:8043fs-serverresponse

The client sends a request to port 8043 and the fs-server service answers.

Transport
TCP
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 8043 dangerous?

We have no specific security note for port 8043. 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 8043

ServicePortTransportDescriptionReferenceUpdated
fs-server 8043 TCP FireScope Server - 2008-10-16
-8043-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 8043, and is it reachable?

Linux

sudo ss -ltnup 'sport = :8043'      # process listening on 8043
sudo lsof -nP -i :8043

macOS

sudo lsof -nP -i :8043

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 8043 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 8043
netstat -ano | findstr :8043

From another machine

nmap -p 8043 -sV <host>
nc -zv <host> 8043

Block it in the firewall

sudo ufw deny 8043/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 8043" -Direction Inbound -LocalPort 8043 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 8043 used for?

Port 8043 is assigned by IANA to fs-server (FireScope Server).

Is port 8043 TCP or UDP?

Port 8043 is registered for TCP.

Is it safe to open port 8043?

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 8043 is open?

On Linux run "ss -ltnup 'sport = :8043'", on macOS "lsof -nP -i :8043", and on Windows "netstat -ano | findstr :8043" to see the local process. From another machine, "nmap -p 8043 <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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