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Port 1164 (qsm-proxy)

IANA assigns port 1164 to qsm-proxy: QSM Proxy Service.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
qsm-proxy TCP QSM Proxy Service Norm Lunde -
qsm-proxy UDP QSM Proxy Service Norm Lunde -

Registry dates for this port: registered 2004-11.

Check what is listening on port 1164

Linux: is anything listening on TCP 1164?
sudo ss -tlnp 'sport = :1164'
Linux: UDP 1164
sudo ss -ulnp 'sport = :1164'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1164
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1164 '
Windows (Command Prompt)
netstat -ano | findstr :1164
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1164 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1164
From Windows
Test-NetConnection HOST -Port 1164
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1164

Block port 1164 in the firewall

ufw
sudo ufw deny 1164/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1164 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1164 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1164' -Direction Inbound -Protocol TCP -LocalPort 1164 -Action Block
ufw
sudo ufw deny 1164/udp
iptables
sudo iptables -A INPUT -p udp --dport 1164 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1164 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1164' -Direction Inbound -Protocol UDP -LocalPort 1164 -Action Block

Related ports

1162health-trap1163sddp1165qsm-gui1166qsm-remote

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