CyberHunter
Local dataset, no network
// Other services

Port 354: bh611

Port 354 is assigned by IANA to bh611 (bh611).

354

How bh611 works

Other services
client:354bh611response client:354bh611response

The client sends a request to port 354 and the bh611 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 354 dangerous?

We have no specific security note for port 354. 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 354

ServicePortTransportDescriptionReferenceUpdated
bh611 354 TCP, UDP bh611 - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 354, and is it reachable?

Linux

sudo ss -ltnup 'sport = :354'      # process listening on 354
sudo lsof -nP -i :354

macOS

sudo lsof -nP -i :354

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 354 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 354
netstat -ano | findstr :354

From another machine

nmap -p 354 -sV <host>
sudo nmap -sU -p 354 <host>
nc -zv <host> 354

Block it in the firewall

sudo ufw deny 354/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 354" -Direction Inbound -LocalPort 354 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 354 used for?

Port 354 is assigned by IANA to bh611 (bh611).

Is port 354 TCP or UDP?

Port 354 is registered for TCP and UDP.

Is it safe to open port 354?

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 354 is open?

On Linux run "ss -ltnup 'sport = :354'", on macOS "lsof -nP -i :354", and on Windows "netstat -ano | findstr :354" to see the local process. From another machine, "nmap -p 354 <host>" shows whether it is reachable.

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