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// Other services

Port 9102: Bacula File Daemon

Port 9102 is assigned by IANA to bacula-fd (Bacula File Daemon).

9102

How bacula-fd works

Other services
client:9102bacula-fdresponse client:9102bacula-fdresponse

The client sends a request to port 9102 and the bacula-fd 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 9102 dangerous?

We have no specific security note for port 9102. 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 9102

ServicePortTransportDescriptionReferenceUpdated
bacula-fd 9102 TCP, UDP Bacula File Daemon - 2002-01

// source: IANA service name and port number registry

03 Check it

Which program uses port 9102, and is it reachable?

Linux

sudo ss -ltnup 'sport = :9102'      # process listening on 9102
sudo lsof -nP -i :9102

macOS

sudo lsof -nP -i :9102

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 9102 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 9102
netstat -ano | findstr :9102

From another machine

nmap -p 9102 -sV <host>
sudo nmap -sU -p 9102 <host>
nc -zv <host> 9102

Block it in the firewall

sudo ufw deny 9102/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 9102" -Direction Inbound -LocalPort 9102 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 9102 used for?

Port 9102 is assigned by IANA to bacula-fd (Bacula File Daemon).

Is port 9102 TCP or UDP?

Port 9102 is registered for TCP and UDP.

Is it safe to open port 9102?

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 9102 is open?

On Linux run "ss -ltnup 'sport = :9102'", on macOS "lsof -nP -i :9102", and on Windows "netstat -ano | findstr :9102" to see the local process. From another machine, "nmap -p 9102 <host>" shows whether it is reachable.

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