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Port 4044 (ltp)

IANA assigns port 4044 to ltp: Location Tracking Protocol.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
ltp TCP Location Tracking Protocol - -
ltp UDP Location Tracking Protocol - -

Check what is listening on port 4044

Linux: is anything listening on TCP 4044?
sudo ss -tlnp 'sport = :4044'
Linux: UDP 4044
sudo ss -ulnp 'sport = :4044'
Linux / macOS: which process owns the port
sudo lsof -nP -i :4044
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':4044 '
Windows (Command Prompt)
netstat -ano | findstr :4044
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 4044 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 4044
From Windows
Test-NetConnection HOST -Port 4044
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 4044

Block port 4044 in the firewall

ufw
sudo ufw deny 4044/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 4044 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 4044 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 4044' -Direction Inbound -Protocol TCP -LocalPort 4044 -Action Block
ufw
sudo ufw deny 4044/udp
iptables
sudo iptables -A INPUT -p udp --dport 4044 -j DROP
nftables
sudo nft add rule inet filter input udp dport 4044 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 4044' -Direction Inbound -Protocol UDP -LocalPort 4044 -Action Block

Related ports

4042ldxp4043nirp4045npp4046acp-proto

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