Port 1594 (sixtrak)

IANA assigns port 1594 to sixtrak.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference

sixtrak TCP sixtrak Red Lion Controls -

sixtrak UDP sixtrak Red Lion Controls -

Registry dates for this port: last modified 2014-09-22.

Linux: is anything listening on TCP 1594?

sudo ss -tlnp 'sport = :1594'

Linux: UDP 1594

sudo ss -ulnp 'sport = :1594'

Linux / macOS: which process owns the port

sudo lsof -nP -i :1594

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':1594 '

Windows (Command Prompt)

netstat -ano | findstr :1594

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1594 -State Listen | Select LocalAddress,OwningProcess

From another machine

nc -vz -w 5 HOST 1594

From Windows

Test-NetConnection HOST -Port 1594

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

nc -vzu -w 5 HOST 1594

ufw

sudo ufw deny 1594/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 1594 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 1594 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 1594' -Direction Inbound -Protocol TCP -LocalPort 1594 -Action Block

ufw

sudo ufw deny 1594/udp

iptables

sudo iptables -A INPUT -p udp --dport 1594 -j DROP

nftables

sudo nft add rule inet filter input udp dport 1594 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block UDP 1594' -Direction Inbound -Protocol UDP -LocalPort 1594 -Action Block

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