Port 422 (ariel3)

IANA assigns port 422 to ariel3: Ariel 3.

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

IANA assignment

Service nameProtoDescriptionAssigneeReference

ariel3 TCP Ariel 3 Joel Karafin -

ariel3 UDP Ariel 3 Joel Karafin -

Linux: is anything listening on TCP 422?

sudo ss -tlnp 'sport = :422'

Linux: UDP 422

sudo ss -ulnp 'sport = :422'

Linux / macOS: which process owns the port

sudo lsof -nP -i :422

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':422 '

Windows (Command Prompt)

netstat -ano | findstr :422

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 422 -State Listen | Select LocalAddress,OwningProcess

From another machine

nc -vz -w 5 HOST 422

From Windows

Test-NetConnection HOST -Port 422

UDP probe (no reply does not prove it is closed)

nc -vzu -w 5 HOST 422

ufw

sudo ufw deny 422/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 422 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 422 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 422' -Direction Inbound -Protocol TCP -LocalPort 422 -Action Block

ufw

sudo ufw deny 422/udp

iptables

sudo iptables -A INPUT -p udp --dport 422 -j DROP

nftables

sudo nft add rule inet filter input udp dport 422 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block UDP 422' -Direction Inbound -Protocol UDP -LocalPort 422 -Action Block

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