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Port 22273 (wnn6)

IANA assigns port 22273 to wnn6.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
wnn6 TCP wnn6 Yasunari Gon Yamasit -
wnn6 UDP wnn6 Yasunari Gon Yamasit -

Check what is listening on port 22273

Linux: is anything listening on TCP 22273?
sudo ss -tlnp 'sport = :22273'
Linux: UDP 22273
sudo ss -ulnp 'sport = :22273'
Linux / macOS: which process owns the port
sudo lsof -nP -i :22273
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':22273 '
Windows (Command Prompt)
netstat -ano | findstr :22273
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 22273 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 22273
From Windows
Test-NetConnection HOST -Port 22273
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 22273

Block port 22273 in the firewall

ufw
sudo ufw deny 22273/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 22273 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 22273 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 22273' -Direction Inbound -Protocol TCP -LocalPort 22273 -Action Block
ufw
sudo ufw deny 22273/udp
iptables
sudo iptables -A INPUT -p udp --dport 22273 -j DROP
nftables
sudo nft add rule inet filter input udp dport 22273 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 22273' -Direction Inbound -Protocol UDP -LocalPort 22273 -Action Block

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