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// Other services

Port 4376: BioAPI Interworking

Port 4376 is assigned by IANA to bip (BioAPI Interworking).

4376

How bip works

Other services
client:4376bipresponse client:4376bipresponse

The client sends a request to port 4376 and the bip 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
Registered (1024-49151)
Category
Other services
01 Security

Is port 4376 dangerous?

We have no specific security note for port 4376. 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 4376

ServicePortTransportDescriptionReferenceUpdated
bip 4376 TCP, UDP BioAPI Interworking - 2007-07-05

// source: IANA service name and port number registry

03 Check it

Which program uses port 4376, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4376'      # process listening on 4376
sudo lsof -nP -i :4376

macOS

sudo lsof -nP -i :4376

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4376 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4376
netstat -ano | findstr :4376

From another machine

nmap -p 4376 -sV <host>
sudo nmap -sU -p 4376 <host>
nc -zv <host> 4376

Block it in the firewall

sudo ufw deny 4376/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4376" -Direction Inbound -LocalPort 4376 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 4376 used for?

Port 4376 is assigned by IANA to bip (BioAPI Interworking).

Is port 4376 TCP or UDP?

Port 4376 is registered for TCP and UDP.

Is it safe to open port 4376?

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 4376 is open?

On Linux run "ss -ltnup 'sport = :4376'", on macOS "lsof -nP -i :4376", and on Windows "netstat -ano | findstr :4376" to see the local process. From another machine, "nmap -p 4376 <host>" shows whether it is reachable.

05 Related
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