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// Other services

Port 662: PFTP

Port 662 is assigned by IANA to pftp (PFTP).

662

How pftp works

Other services
client:662pftpresponse client:662pftpresponse

The client sends a request to port 662 and the pftp 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
Well-known (0-1023)
Category
Other services
01 Security

Is port 662 dangerous?

We have no specific security note for port 662. 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 662

ServicePortTransportDescriptionReferenceUpdated
pftp 662 TCP, UDP PFTP - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 662, and is it reachable?

Linux

sudo ss -ltnup 'sport = :662'      # process listening on 662
sudo lsof -nP -i :662

macOS

sudo lsof -nP -i :662

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 662 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 662
netstat -ano | findstr :662

From another machine

nmap -p 662 -sV <host>
sudo nmap -sU -p 662 <host>
nc -zv <host> 662

Block it in the firewall

sudo ufw deny 662/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 662" -Direction Inbound -LocalPort 662 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 662 used for?

Port 662 is assigned by IANA to pftp (PFTP).

Is port 662 TCP or UDP?

Port 662 is registered for TCP and UDP.

Is it safe to open port 662?

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 662 is open?

On Linux run "ss -ltnup 'sport = :662'", on macOS "lsof -nP -i :662", and on Windows "netstat -ano | findstr :662" to see the local process. From another machine, "nmap -p 662 <host>" shows whether it is reachable.

05 Related
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