CyberHunter
Local dataset, no network
// Other services

Port 9208: rjcdb vCard

Port 9208 is assigned by IANA to rjcdb-vcards (rjcdb vCard).

9208

How rjcdb-vcards works

Other services
client:9208rjcdb-vcardsresponse client:9208rjcdb-vcardsresponse

The client sends a request to port 9208 and the rjcdb-vcards 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 9208 dangerous?

We have no specific security note for port 9208. 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 9208

ServicePortTransportDescriptionReferenceUpdated
rjcdb-vcards 9208 TCP, UDP rjcdb vCard - 2006-01

// source: IANA service name and port number registry

03 Check it

Which program uses port 9208, and is it reachable?

Linux

sudo ss -ltnup 'sport = :9208'      # process listening on 9208
sudo lsof -nP -i :9208

macOS

sudo lsof -nP -i :9208

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 9208 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 9208
netstat -ano | findstr :9208

From another machine

nmap -p 9208 -sV <host>
sudo nmap -sU -p 9208 <host>
nc -zv <host> 9208

Block it in the firewall

sudo ufw deny 9208/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 9208" -Direction Inbound -LocalPort 9208 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 9208 used for?

Port 9208 is assigned by IANA to rjcdb-vcards (rjcdb vCard).

Is port 9208 TCP or UDP?

Port 9208 is registered for TCP and UDP.

Is it safe to open port 9208?

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 9208 is open?

On Linux run "ss -ltnup 'sport = :9208'", on macOS "lsof -nP -i :9208", and on Windows "netstat -ano | findstr :9208" to see the local process. From another machine, "nmap -p 9208 <host>" shows whether it is reachable.

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