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// File transfer & sharing

Port 574: FTP Software Agent System

Port 574 is assigned by IANA to ftp-agent (FTP Software Agent System).

574

How ftp-agent works

File transfer & sharing
client:5741/32/33/3ftp-agent client:5741/32/33/3ftp-agent

Files are sent over port 574 in pieces and reassembled on the other side.

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
File transfer & sharing
01 Security

Is port 574 dangerous?

We have no specific security note for port 574. Its risk depends on the program actually listening on it. General advice for file transfer & sharing services:

  • Prefer encrypted protocols (SFTP, FTPS, SMB 3 with encryption).
  • Disable anonymous access and restrict shares or exports to known hosts.
  • Never publish file sharing protocols to the Internet.
02 Registry

IANA registry entries for port 574

ServicePortTransportDescriptionReferenceUpdated
ftp-agent 574 TCP, UDP FTP Software Agent System - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 574, and is it reachable?

Linux

sudo ss -ltnup 'sport = :574'      # process listening on 574
sudo lsof -nP -i :574

macOS

sudo lsof -nP -i :574

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 574 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 574
netstat -ano | findstr :574

From another machine

nmap -p 574 -sV <host>
sudo nmap -sU -p 574 <host>
nc -zv <host> 574

Block it in the firewall

sudo ufw deny 574/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 574" -Direction Inbound -LocalPort 574 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 574 used for?

Port 574 is assigned by IANA to ftp-agent (FTP Software Agent System).

Is port 574 TCP or UDP?

Port 574 is registered for TCP and UDP.

Is it safe to open port 574?

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. Prefer encrypted protocols (SFTP, FTPS, SMB 3 with encryption).

How do I check if port 574 is open?

On Linux run "ss -ltnup 'sport = :574'", on macOS "lsof -nP -i :574", and on Windows "netstat -ano | findstr :574" to see the local process. From another machine, "nmap -p 574 <host>" shows whether it is reachable.

05 Related
:445 SMB tcp · udp · critical risk :21 FTP tcp · udp · sctp · high risk :139 NetBIOS Session tcp · udp · high risk :69 TFTP udp · tcp · high risk :2049 NFS tcp · udp · sctp · high risk :873 rsync tcp · udp · high risk :20 File Transfer [Default Data] tcp · udp · sctp :115 Simple File Transfer Protocol tcp · udp

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