HTTPfy

Port 1509 (robcad-lm)

IANA assigns port 1509 to robcad-lm: Robcad, Ltd. License Manager.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
robcad-lm TCP Robcad, Ltd. License Manager Hindin Joseph -
robcad-lm UDP Robcad, Ltd. License Manager Hindin Joseph -

Check what is listening on port 1509

Linux: is anything listening on TCP 1509?
sudo ss -tlnp 'sport = :1509'
Linux: UDP 1509
sudo ss -ulnp 'sport = :1509'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1509
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1509 '
Windows (Command Prompt)
netstat -ano | findstr :1509
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1509 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1509
From Windows
Test-NetConnection HOST -Port 1509
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1509

Block port 1509 in the firewall

ufw
sudo ufw deny 1509/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1509 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1509 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1509' -Direction Inbound -Protocol TCP -LocalPort 1509 -Action Block
ufw
sudo ufw deny 1509/udp
iptables
sudo iptables -A INPUT -p udp --dport 1509 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1509 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1509' -Direction Inbound -Protocol UDP -LocalPort 1509 -Action Block

Related ports

1507symplex1508diagmond1510mvx-lm15113l-l1

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