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Port 1422 (autodesk-lm)

IANA assigns port 1422 to autodesk-lm: Autodesk License Manager.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
autodesk-lm TCP Autodesk License Manager David Ko -
autodesk-lm UDP Autodesk License Manager David Ko -

Check what is listening on port 1422

Linux: is anything listening on TCP 1422?
sudo ss -tlnp 'sport = :1422'
Linux: UDP 1422
sudo ss -ulnp 'sport = :1422'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1422
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1422 '
Windows (Command Prompt)
netstat -ano | findstr :1422
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1422 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1422
From Windows
Test-NetConnection HOST -Port 1422
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1422

Block port 1422 in the firewall

ufw
sudo ufw deny 1422/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1422 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1422 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1422' -Direction Inbound -Protocol TCP -LocalPort 1422 -Action Block
ufw
sudo ufw deny 1422/udp
iptables
sudo iptables -A INPUT -p udp --dport 1422 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1422 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1422' -Direction Inbound -Protocol UDP -LocalPort 1422 -Action Block

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