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// File transfer & sharing

Port 7394: File system export of backup images

Port 7394 is assigned by IANA to fse (File system export of backup images).

7394

How fse works

File transfer & sharing
client:73941/32/33/3fse client:73941/32/33/3fse

Files are sent over port 7394 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
Registered (1024-49151)
Category
File transfer & sharing
01 Security

Is port 7394 dangerous?

We have no specific security note for port 7394. 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 7394

ServicePortTransportDescriptionReferenceUpdated
fse 7394 TCP, UDP File system export of backup images - 2006-04

// source: IANA service name and port number registry

03 Check it

Which program uses port 7394, and is it reachable?

Linux

sudo ss -ltnup 'sport = :7394'      # process listening on 7394
sudo lsof -nP -i :7394

macOS

sudo lsof -nP -i :7394

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 7394 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 7394
netstat -ano | findstr :7394

From another machine

nmap -p 7394 -sV <host>
sudo nmap -sU -p 7394 <host>
nc -zv <host> 7394

Block it in the firewall

sudo ufw deny 7394/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 7394" -Direction Inbound -LocalPort 7394 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 7394 used for?

Port 7394 is assigned by IANA to fse (File system export of backup images).

Is port 7394 TCP or UDP?

Port 7394 is registered for TCP and UDP.

Is it safe to open port 7394?

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 7394 is open?

On Linux run "ss -ltnup 'sport = :7394'", on macOS "lsof -nP -i :7394", and on Windows "netstat -ano | findstr :7394" to see the local process. From another machine, "nmap -p 7394 <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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