HTTPfy

Port 8471 (pim-port)

IANA assigns port 8471 to pim-port: PIM over Reliable Transport.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference
pim-port TCP PIM over Reliable Transport IESG RFC 6559
pim-port SCTP PIM over Reliable Transport IESG RFC 6559

Registry dates for this port: registered 2008-08-21.

Check what is listening on port 8471

Linux: is anything listening on TCP 8471?
sudo ss -tlnp 'sport = :8471'
Linux / macOS: which process owns the port
sudo lsof -nP -i :8471
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':8471 '
Windows (Command Prompt)
netstat -ano | findstr :8471
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 8471 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 8471
From Windows
Test-NetConnection HOST -Port 8471

Block port 8471 in the firewall

ufw
sudo ufw deny 8471/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 8471 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 8471 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 8471' -Direction Inbound -Protocol TCP -LocalPort 8471 -Action Block

Related ports

8457nexentamv8470cisco-avp8472VXLAN (Linux default / Flannel)8473vp2p

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