3390: Port

Port 3390 is not an official IANA standard, but it is commonly used as the alternative port for Microsoft Remote Desktop (RDP) when administrators change the default from 3389.

I see so many admins change RDP from 3389 → 3390 and call it a "security upgrade." 3390 port

#CyberSecurity #InfoSec #RDP #Port3390 #WindowsServer Title: Troubleshooting Port 3390 (Alternative RDP) Port 3390 is not an official IANA standard,