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// Other services

Port 6347: gnutella-rtr

Port 6347 is assigned by IANA to gnutella-rtr (gnutella-rtr).

6347

How gnutella-rtr works

Other services
client:6347gnutella-rtrresponse client:6347gnutella-rtrresponse

The client sends a request to port 6347 and the gnutella-rtr 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 6347 dangerous?

We have no specific security note for port 6347. 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 6347

ServicePortTransportDescriptionReferenceUpdated
gnutella-rtr 6347 TCP, UDP gnutella-rtr - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 6347, and is it reachable?

Linux

sudo ss -ltnup 'sport = :6347'      # process listening on 6347
sudo lsof -nP -i :6347

macOS

sudo lsof -nP -i :6347

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 6347 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 6347
netstat -ano | findstr :6347

From another machine

nmap -p 6347 -sV <host>
sudo nmap -sU -p 6347 <host>
nc -zv <host> 6347

Block it in the firewall

sudo ufw deny 6347/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 6347" -Direction Inbound -LocalPort 6347 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 6347 used for?

Port 6347 is assigned by IANA to gnutella-rtr (gnutella-rtr).

Is port 6347 TCP or UDP?

Port 6347 is registered for TCP and UDP.

Is it safe to open port 6347?

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 6347 is open?

On Linux run "ss -ltnup 'sport = :6347'", on macOS "lsof -nP -i :6347", and on Windows "netstat -ano | findstr :6347" to see the local process. From another machine, "nmap -p 6347 <host>" shows whether it is reachable.

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