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Port 1383 (gwha)

IANA assigns port 1383 to gwha: GW Hannaway Network License Manager.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
gwha TCP GW Hannaway Network License Manager J Gabriel Foster -
gwha UDP GW Hannaway Network License Manager J Gabriel Foster -

Check what is listening on port 1383

Linux: is anything listening on TCP 1383?
sudo ss -tlnp 'sport = :1383'
Linux: UDP 1383
sudo ss -ulnp 'sport = :1383'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1383
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1383 '
Windows (Command Prompt)
netstat -ano | findstr :1383
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1383 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1383
From Windows
Test-NetConnection HOST -Port 1383
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1383

Block port 1383 in the firewall

ufw
sudo ufw deny 1383/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1383 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1383 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1383' -Direction Inbound -Protocol TCP -LocalPort 1383 -Action Block
ufw
sudo ufw deny 1383/udp
iptables
sudo iptables -A INPUT -p udp --dport 1383 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1383 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1383' -Direction Inbound -Protocol UDP -LocalPort 1383 -Action Block

Related ports

1381apple-licman1382udt-os, udt_os1384os-licman1385atex-elmd, atex_elmd

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