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Port 324 (rpki-rtr-tls)

IANA assigns port 324 to rpki-rtr-tls: Resource PKI to Router Protocol over TLS.

Well-known (system) port, 0-1023 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference
rpki-rtr-tls TCP Resource PKI to Router Protocol over TLS IESG RFC 6810

Check what is listening on port 324

Linux: is anything listening on TCP 324?
sudo ss -tlnp 'sport = :324'
Linux / macOS: which process owns the port
sudo lsof -nP -i :324
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':324 '
Windows (Command Prompt)
netstat -ano | findstr :324
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 324 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 324
From Windows
Test-NetConnection HOST -Port 324

Block port 324 in the firewall

ufw
sudo ufw deny 324/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 324 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 324 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 324' -Direction Inbound -Protocol TCP -LocalPort 324 -Action Block

Related ports

322rtsps323rpki-rtr333texar344pdap

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