CyberHunter
Local dataset, no network
// Other services

Port 6404: Business Objects Enterprise internal server

Port 6404 is assigned by IANA to boe-filesvr (Business Objects Enterprise internal server).

6404

How boe-filesvr works

Other services
client:6404boe-filesvrresponse client:6404boe-filesvrresponse

The client sends a request to port 6404 and the boe-filesvr service answers.

Transport
None registered
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 6404 dangerous?

We have no specific security note for port 6404. 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 6404

ServicePortTransportDescriptionReferenceUpdated
boe-filesvr 6404 - Business Objects Enterprise internal server - 2026-05-27

// source: IANA service name and port number registry

03 Check it

Which program uses port 6404, and is it reachable?

Linux

sudo ss -ltnup 'sport = :6404'      # process listening on 6404
sudo lsof -nP -i :6404

macOS

sudo lsof -nP -i :6404

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 6404 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 6404
netstat -ano | findstr :6404

From another machine

nmap -p 6404 -sV <host>
nc -zv <host> 6404

Block it in the firewall

sudo ufw deny 6404/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 6404" -Direction Inbound -LocalPort 6404 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 6404 used for?

Port 6404 is assigned by IANA to boe-filesvr (Business Objects Enterprise internal server).

Is port 6404 TCP or UDP?

Port 6404 has no registered transport. Any program can still use it over TCP or UDP.

Is it safe to open port 6404?

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 6404 is open?

On Linux run "ss -ltnup 'sport = :6404'", on macOS "lsof -nP -i :6404", and on Windows "netstat -ano | findstr :6404" to see the local process. From another machine, "nmap -p 6404 <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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