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// Other services

Port 6104: DBDB

Port 6104 is assigned by IANA to dbdb (DBDB).

6104

How dbdb works

Other services
client:6104dbdbresponse client:6104dbdbresponse

The client sends a request to port 6104 and the dbdb 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 6104 dangerous?

We have no specific security note for port 6104. 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 6104

ServicePortTransportDescriptionReferenceUpdated
dbdb 6104 TCP, UDP DBDB - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 6104, and is it reachable?

Linux

sudo ss -ltnup 'sport = :6104'      # process listening on 6104
sudo lsof -nP -i :6104

macOS

sudo lsof -nP -i :6104

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 6104 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 6104
netstat -ano | findstr :6104

From another machine

nmap -p 6104 -sV <host>
sudo nmap -sU -p 6104 <host>
nc -zv <host> 6104

Block it in the firewall

sudo ufw deny 6104/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 6104" -Direction Inbound -LocalPort 6104 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 6104 used for?

Port 6104 is assigned by IANA to dbdb (DBDB).

Is port 6104 TCP or UDP?

Port 6104 is registered for TCP and UDP.

Is it safe to open port 6104?

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 6104 is open?

On Linux run "ss -ltnup 'sport = :6104'", on macOS "lsof -nP -i :6104", and on Windows "netstat -ano | findstr :6104" to see the local process. From another machine, "nmap -p 6104 <host>" shows whether it is reachable.

05 Related
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