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Port 9522 (sma-spw)

IANA assigns port 9522 to sma-spw: SMA Speedwire.

Registered (user) port, 1024-49151 UDP

Port 9522 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
sma-spw UDP SMA Speedwire SMA Solar Techology -

Registry dates for this port: registered 2011-03-08.

Check what is listening on port 9522

Linux: UDP 9522
sudo ss -ulnp 'sport = :9522'
Linux / macOS: which process owns the port
sudo lsof -nP -i :9522
Windows (Command Prompt)
netstat -ano | findstr :9522
Windows (PowerShell)
Get-NetUDPEndpoint -LocalPort 9522

Test it from outside

UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 9522

Block port 9522 in the firewall

ufw
sudo ufw deny 9522/udp
iptables
sudo iptables -A INPUT -p udp --dport 9522 -j DROP
nftables
sudo nft add rule inet filter input udp dport 9522 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 9522' -Direction Inbound -Protocol UDP -LocalPort 9522 -Action Block

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