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Port 6347 (gnutella-rtr)

IANA assigns port 6347 to gnutella-rtr.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
gnutella-rtr TCP gnutella-rtr Serguei Osokine -
gnutella-rtr UDP gnutella-rtr Serguei Osokine -

Check what is listening on port 6347

Linux: is anything listening on TCP 6347?
sudo ss -tlnp 'sport = :6347'
Linux: UDP 6347
sudo ss -ulnp 'sport = :6347'
Linux / macOS: which process owns the port
sudo lsof -nP -i :6347
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':6347 '
Windows (Command Prompt)
netstat -ano | findstr :6347
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 6347 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 6347
From Windows
Test-NetConnection HOST -Port 6347
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 6347

Block port 6347 in the firewall

ufw
sudo ufw deny 6347/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 6347 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 6347 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 6347' -Direction Inbound -Protocol TCP -LocalPort 6347 -Action Block
ufw
sudo ufw deny 6347/udp
iptables
sudo iptables -A INPUT -p udp --dport 6347 -j DROP
nftables
sudo nft add rule inet filter input udp dport 6347 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 6347' -Direction Inbound -Protocol UDP -LocalPort 6347 -Action Block

Related ports

6344streletz6346gnutella-svc6350adap6355pmcs

All port numbers · Open port checker
Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.