CyberHunter
Local dataset, no network
// Other services

Port 357: bhevent

Port 357 is assigned by IANA to bhevent (bhevent).

357

How bhevent works

Other services
client:357bheventresponse client:357bheventresponse

The client sends a request to port 357 and the bhevent 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 357 dangerous?

We have no specific security note for port 357. 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 357

ServicePortTransportDescriptionReferenceUpdated
bhevent 357 TCP, UDP bhevent - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 357, and is it reachable?

Linux

sudo ss -ltnup 'sport = :357'      # process listening on 357
sudo lsof -nP -i :357

macOS

sudo lsof -nP -i :357

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 357 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 357
netstat -ano | findstr :357

From another machine

nmap -p 357 -sV <host>
sudo nmap -sU -p 357 <host>
nc -zv <host> 357

Block it in the firewall

sudo ufw deny 357/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 357" -Direction Inbound -LocalPort 357 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 357 used for?

Port 357 is assigned by IANA to bhevent (bhevent).

Is port 357 TCP or UDP?

Port 357 is registered for TCP and UDP.

Is it safe to open port 357?

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 357 is open?

On Linux run "ss -ltnup 'sport = :357'", on macOS "lsof -nP -i :357", and on Windows "netstat -ano | findstr :357" to see the local process. From another machine, "nmap -p 357 <host>" shows whether it is reachable.

05 Related
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