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Port 5406 (systemics-sox)

IANA assigns port 5406 to systemics-sox: Systemics Sox.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
systemics-sox TCP Systemics Sox Gary Howland -
systemics-sox UDP Systemics Sox Gary Howland -

Check what is listening on port 5406

Linux: is anything listening on TCP 5406?
sudo ss -tlnp 'sport = :5406'
Linux: UDP 5406
sudo ss -ulnp 'sport = :5406'
Linux / macOS: which process owns the port
sudo lsof -nP -i :5406
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':5406 '
Windows (Command Prompt)
netstat -ano | findstr :5406
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 5406 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 5406
From Windows
Test-NetConnection HOST -Port 5406
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 5406

Block port 5406 in the firewall

ufw
sudo ufw deny 5406/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 5406 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 5406 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 5406' -Direction Inbound -Protocol TCP -LocalPort 5406 -Action Block
ufw
sudo ufw deny 5406/udp
iptables
sudo iptables -A INPUT -p udp --dport 5406 -j DROP
nftables
sudo nft add rule inet filter input udp dport 5406 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 5406' -Direction Inbound -Protocol UDP -LocalPort 5406 -Action Block

Related ports

5404hpoms-dps-lstn5405netsupport5407foresyte-clear5408foresyte-sec

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