CyberHunter
Local dataset, no network
// Other services

Port 6402: boe-eventsrv

Port 6402 is assigned by IANA to boe-eventsrv (boe-eventsrv).

6402

How boe-eventsrv works

Other services
client:6402boe-eventsrvresponse client:6402boe-eventsrvresponse

The client sends a request to port 6402 and the boe-eventsrv 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 6402 dangerous?

We have no specific security note for port 6402. 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 6402

ServicePortTransportDescriptionReferenceUpdated
boe-eventsrv 6402 - boe-eventsrv - 2026-05-27

// source: IANA service name and port number registry

03 Check it

Which program uses port 6402, and is it reachable?

Linux

sudo ss -ltnup 'sport = :6402'      # process listening on 6402
sudo lsof -nP -i :6402

macOS

sudo lsof -nP -i :6402

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 6402 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 6402
netstat -ano | findstr :6402

From another machine

nmap -p 6402 -sV <host>
nc -zv <host> 6402

Block it in the firewall

sudo ufw deny 6402/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 6402" -Direction Inbound -LocalPort 6402 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 6402 used for?

Port 6402 is assigned by IANA to boe-eventsrv (boe-eventsrv).

Is port 6402 TCP or UDP?

Port 6402 has no registered transport. Any program can still use it over TCP or UDP.

Is it safe to open port 6402?

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 6402 is open?

On Linux run "ss -ltnup 'sport = :6402'", on macOS "lsof -nP -i :6402", and on Windows "netstat -ano | findstr :6402" to see the local process. From another machine, "nmap -p 6402 <host>" shows whether it is reachable.

05 Related
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