CyberHunter
Local dataset, no network
// Other services

Port 4446: N1-FWP

Port 4446 is assigned by IANA to n1-fwp (N1-FWP).

4446

How n1-fwp works

Other services
client:4446n1-fwpresponse client:4446n1-fwpresponse

The client sends a request to port 4446 and the n1-fwp 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 4446 dangerous?

We have no specific security note for port 4446. 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 4446

ServicePortTransportDescriptionReferenceUpdated
n1-fwp 4446 TCP, UDP N1-FWP - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 4446, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4446'      # process listening on 4446
sudo lsof -nP -i :4446

macOS

sudo lsof -nP -i :4446

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4446 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4446
netstat -ano | findstr :4446

From another machine

nmap -p 4446 -sV <host>
sudo nmap -sU -p 4446 <host>
nc -zv <host> 4446

Block it in the firewall

sudo ufw deny 4446/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4446" -Direction Inbound -LocalPort 4446 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 4446 used for?

Port 4446 is assigned by IANA to n1-fwp (N1-FWP).

Is port 4446 TCP or UDP?

Port 4446 is registered for TCP and UDP.

Is it safe to open port 4446?

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 4446 is open?

On Linux run "ss -ltnup 'sport = :4446'", on macOS "lsof -nP -i :4446", and on Windows "netstat -ano | findstr :4446" to see the local process. From another machine, "nmap -p 4446 <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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