CyberHunter
Local dataset, no network
// Other services

Port 3208: PFU PR Callback

Port 3208 is assigned by IANA to pfu-prcallback (PFU PR Callback).

3208

How pfu-prcallback works

Other services
client:3208pfu-prcallbackresponse client:3208pfu-prcallbackresponse

The client sends a request to port 3208 and the pfu-prcallback 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 3208 dangerous?

We have no specific security note for port 3208. 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 3208

ServicePortTransportDescriptionReferenceUpdated
pfu-prcallback 3208 TCP, UDP PFU PR Callback - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 3208, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3208'      # process listening on 3208
sudo lsof -nP -i :3208

macOS

sudo lsof -nP -i :3208

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3208 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3208
netstat -ano | findstr :3208

From another machine

nmap -p 3208 -sV <host>
sudo nmap -sU -p 3208 <host>
nc -zv <host> 3208

Block it in the firewall

sudo ufw deny 3208/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3208" -Direction Inbound -LocalPort 3208 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3208 used for?

Port 3208 is assigned by IANA to pfu-prcallback (PFU PR Callback).

Is port 3208 TCP or UDP?

Port 3208 is registered for TCP and UDP.

Is it safe to open port 3208?

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 3208 is open?

On Linux run "ss -ltnup 'sport = :3208'", on macOS "lsof -nP -i :3208", and on Windows "netstat -ano | findstr :3208" to see the local process. From another machine, "nmap -p 3208 <host>" shows whether it is reachable.

05 Related
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