HTTPfy

Port 8211 (aruba-papi)

IANA assigns port 8211 to aruba-papi: Aruba Networks AP management.

Registered (user) port, 1024-49151 UDP

Port 8211 is normally used over UDP; the checker tests TCP only, so a "filtered" result does not mean the UDP service is down.

IANA assignment

Service nameProtoDescriptionAssigneeReference
aruba-papi UDP Aruba Networks AP management Aruba Networks -

Registry dates for this port: registered 2018-10-04.

Check what is listening on port 8211

Linux: UDP 8211
sudo ss -ulnp 'sport = :8211'
Linux / macOS: which process owns the port
sudo lsof -nP -i :8211
Windows (Command Prompt)
netstat -ano | findstr :8211
Windows (PowerShell)
Get-NetUDPEndpoint -LocalPort 8211

Test it from outside

UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 8211

Block port 8211 in the firewall

ufw
sudo ufw deny 8211/udp
iptables
sudo iptables -A INPUT -p udp --dport 8211 -j DROP
nftables
sudo nft add rule inet filter input udp dport 8211 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 8211' -Direction Inbound -Protocol UDP -LocalPort 8211 -Action Block

Related ports

8207lm-sserver8208lm-webwatcher8230rexecj8231hncp-udp-port

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