← Port Encyclopedia
33389
RDP-Alt
TCP
Remote Access
High Risk
Alternative RDP — non-standard Remote Desktop port
🔍 How to Scan Port 33389
nmap -sV -p 33389 target
nmap -sV -sC --script=banner -p 33389 target
nc -zv target 33389
🛡️ Security Considerations
- Scan port 33389 with
nmap -sVto identify the exact service and version - If RDP-Alt is not needed, close or firewall this port immediately
- Check for default credentials if a management interface runs on this port
- Use
searchsploit rdp-altto find known exploits - Monitor traffic on port 33389 with Wireshark or tcpdump for anomalies
- Ensure the service is patched to the latest version to prevent known CVE exploitation