Port 25471 (rna)

IANA assigns port 25471 to rna: RNSAP User Adaptation for Iurh.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference

rna SCTP RNSAP User Adaptation for Iurh Dario S Tonesi -

Registry dates for this port: registered 2011-02-07.

Linux: is anything listening on TCP 25471?

sudo ss -tlnp 'sport = :25471'

Linux / macOS: which process owns the port

sudo lsof -nP -i :25471

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':25471 '

Windows (Command Prompt)

netstat -ano | findstr :25471

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 25471 -State Listen | Select LocalAddress,OwningProcess

From another machine

nc -vz -w 5 HOST 25471

From Windows

Test-NetConnection HOST -Port 25471

ufw

sudo ufw deny 25471/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 25471 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 25471 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 25471' -Direction Inbound -Protocol TCP -LocalPort 25471 -Action Block

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Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.