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// Other services

Port 3327: BBARS

Port 3327 is assigned by IANA to bbars (BBARS).

3327

How bbars works

Other services
client:3327bbarsresponse client:3327bbarsresponse

The client sends a request to port 3327 and the bbars 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 3327 dangerous?

We have no specific security note for port 3327. 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 3327

ServicePortTransportDescriptionReferenceUpdated
bbars 3327 TCP, UDP BBARS - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 3327, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3327'      # process listening on 3327
sudo lsof -nP -i :3327

macOS

sudo lsof -nP -i :3327

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3327 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3327
netstat -ano | findstr :3327

From another machine

nmap -p 3327 -sV <host>
sudo nmap -sU -p 3327 <host>
nc -zv <host> 3327

Block it in the firewall

sudo ufw deny 3327/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3327" -Direction Inbound -LocalPort 3327 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3327 used for?

Port 3327 is assigned by IANA to bbars (BBARS).

Is port 3327 TCP or UDP?

Port 3327 is registered for TCP and UDP.

Is it safe to open port 3327?

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 3327 is open?

On Linux run "ss -ltnup 'sport = :3327'", on macOS "lsof -nP -i :3327", and on Windows "netstat -ano | findstr :3327" to see the local process. From another machine, "nmap -p 3327 <host>" shows whether it is reachable.

05 Related
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