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Port 9389 (adws)

IANA assigns port 9389 to adws: Active Directory Web Services.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference
adws TCP Active Directory Web Services Nitin Gupta -

Registry dates for this port: registered 2008-12-24.

Check what is listening on port 9389

Linux: is anything listening on TCP 9389?
sudo ss -tlnp 'sport = :9389'
Linux / macOS: which process owns the port
sudo lsof -nP -i :9389
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':9389 '
Windows (Command Prompt)
netstat -ano | findstr :9389
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 9389 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 9389
From Windows
Test-NetConnection HOST -Port 9389

Block port 9389 in the firewall

ufw
sudo ufw deny 9389/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 9389 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 9389 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 9389' -Direction Inbound -Protocol TCP -LocalPort 9389 -Action Block

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