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// Other services

Port 310: bhmds

Port 310 is assigned by IANA to bhmds (bhmds).

310

How bhmds works

Other services
client:310bhmdsresponse client:310bhmdsresponse

The client sends a request to port 310 and the bhmds 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 310 dangerous?

We have no specific security note for port 310. 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 310

ServicePortTransportDescriptionReferenceUpdated
bhmds 310 TCP, UDP bhmds - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 310, and is it reachable?

Linux

sudo ss -ltnup 'sport = :310'      # process listening on 310
sudo lsof -nP -i :310

macOS

sudo lsof -nP -i :310

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 310 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 310
netstat -ano | findstr :310

From another machine

nmap -p 310 -sV <host>
sudo nmap -sU -p 310 <host>
nc -zv <host> 310

Block it in the firewall

sudo ufw deny 310/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 310" -Direction Inbound -LocalPort 310 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 310 used for?

Port 310 is assigned by IANA to bhmds (bhmds).

Is port 310 TCP or UDP?

Port 310 is registered for TCP and UDP.

Is it safe to open port 310?

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 310 is open?

On Linux run "ss -ltnup 'sport = :310'", on macOS "lsof -nP -i :310", and on Windows "netstat -ano | findstr :310" to see the local process. From another machine, "nmap -p 310 <host>" shows whether it is reachable.

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