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Port 3069 (ls3)

IANA assigns port 3069 to ls3.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
ls3 TCP ls3 Jim Thompson -
ls3 UDP ls3 Jim Thompson -

Check what is listening on port 3069

Linux: is anything listening on TCP 3069?
sudo ss -tlnp 'sport = :3069'
Linux: UDP 3069
sudo ss -ulnp 'sport = :3069'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3069
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3069 '
Windows (Command Prompt)
netstat -ano | findstr :3069
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3069 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3069
From Windows
Test-NetConnection HOST -Port 3069
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3069

Block port 3069 in the firewall

ufw
sudo ufw deny 3069/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3069 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3069 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3069' -Direction Inbound -Protocol TCP -LocalPort 3069 -Action Block
ufw
sudo ufw deny 3069/udp
iptables
sudo iptables -A INPUT -p udp --dport 3069 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3069 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3069' -Direction Inbound -Protocol UDP -LocalPort 3069 -Action Block

Related ports

3067fjhpjp3068ls3bcast3070mgxswitch3071xplat-replicate

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