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// Other services

Port 351: bhoetty

Port 351 is assigned by IANA to bhoetty (bhoetty), matip-type-b (MATIP Type B).

351

How bhoetty works

Other services
client:351bhoettyresponse client:351bhoettyresponse

The client sends a request to port 351 and the bhoetty service answers.

Transport
TCP · UDP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned2 registered services
Range
Well-known (0-1023)
Category
Other services
01 Security

Is port 351 dangerous?

We have no specific security note for port 351. 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 351

ServicePortTransportDescriptionReferenceUpdated
bhoetty 351 TCP, UDP bhoetty - -
matip-type-b 351 TCP, UDP MATIP Type B RFC 2351 -

// source: IANA service name and port number registry

03 Check it

Which program uses port 351, and is it reachable?

Linux

sudo ss -ltnup 'sport = :351'      # process listening on 351
sudo lsof -nP -i :351

macOS

sudo lsof -nP -i :351

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 351 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 351
netstat -ano | findstr :351

From another machine

nmap -p 351 -sV <host>
sudo nmap -sU -p 351 <host>
nc -zv <host> 351

Block it in the firewall

sudo ufw deny 351/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 351" -Direction Inbound -LocalPort 351 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 351 used for?

Port 351 is assigned by IANA to bhoetty (bhoetty), matip-type-b (MATIP Type B).

Is port 351 TCP or UDP?

Port 351 is registered for TCP and UDP.

Is it safe to open port 351?

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 351 is open?

On Linux run "ss -ltnup 'sport = :351'", on macOS "lsof -nP -i :351", and on Windows "netstat -ano | findstr :351" to see the local process. From another machine, "nmap -p 351 <host>" shows whether it is reachable.

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