HTTPfy

Port 4711 (trinity-dist)

IANA assigns port 4711 to trinity-dist: Trinity Trust Network Node Communication.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
trinity-dist TCP Trinity Trust Network Node Communication P3KI GmbH -
trinity-dist UDP Trinity Trust Network Node Communication P3KI GmbH -
trinity-dist SCTP Trinity Trust Network Node Communication P3KI GmbH -

Registry dates for this port: registered 2017-01-12.

Check what is listening on port 4711

Linux: is anything listening on TCP 4711?
sudo ss -tlnp 'sport = :4711'
Linux: UDP 4711
sudo ss -ulnp 'sport = :4711'
Linux / macOS: which process owns the port
sudo lsof -nP -i :4711
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':4711 '
Windows (Command Prompt)
netstat -ano | findstr :4711
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 4711 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 4711
From Windows
Test-NetConnection HOST -Port 4711
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 4711

Block port 4711 in the firewall

ufw
sudo ufw deny 4711/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 4711 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 4711 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 4711' -Direction Inbound -Protocol TCP -LocalPort 4711 -Action Block
ufw
sudo ufw deny 4711/udp
iptables
sudo iptables -A INPUT -p udp --dport 4711 -j DROP
nftables
sudo nft add rule inet filter input udp dport 4711 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 4711' -Direction Inbound -Protocol UDP -LocalPort 4711 -Action Block

Related ports

4703npqes-test4704assuria-ins4725truckstar4726a26-fap-fgw

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