CyberHunter
Local dataset, no network
// Other services

Port 4349: File System Port Map

Port 4349 is assigned by IANA to fsportmap (File System Port Map).

4349

How fsportmap works

Other services
client:4349fsportmapresponse client:4349fsportmapresponse

The client sends a request to port 4349 and the fsportmap 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 4349 dangerous?

We have no specific security note for port 4349. 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 4349

ServicePortTransportDescriptionReferenceUpdated
fsportmap 4349 TCP, UDP File System Port Map - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 4349, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4349'      # process listening on 4349
sudo lsof -nP -i :4349

macOS

sudo lsof -nP -i :4349

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4349 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4349
netstat -ano | findstr :4349

From another machine

nmap -p 4349 -sV <host>
sudo nmap -sU -p 4349 <host>
nc -zv <host> 4349

Block it in the firewall

sudo ufw deny 4349/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4349" -Direction Inbound -LocalPort 4349 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 4349 used for?

Port 4349 is assigned by IANA to fsportmap (File System Port Map).

Is port 4349 TCP or UDP?

Port 4349 is registered for TCP and UDP.

Is it safe to open port 4349?

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 4349 is open?

On Linux run "ss -ltnup 'sport = :4349'", on macOS "lsof -nP -i :4349", and on Windows "netstat -ano | findstr :4349" to see the local process. From another machine, "nmap -p 4349 <host>" shows whether it is reachable.

05 Related
:4444 Metasploit default / krb524 tcp · udp · high risk :31337 Back Orifice / elite tcp · udp · high risk :1 TCP Port Service Multiplexer tcp · udp :5 Remote Job Entry tcp · udp :9 Discard tcp · udp · sctp · dccp :11 Active Users tcp · udp :17 Quote of the Day tcp · udp :18 Message Send Protocol (historic) tcp · udp

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