Port: 3390

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.

#SysAdmin #Windows #RDP #ITSupport Post: Port 3390 isn't magic. 3390 port

I’ve included a few versions depending on your audience (Security, IT, or general tech). Headline: 🚨 Port 3390: The "Hidden" Backdoor You Didn't Know You Had Port 3390 is not an official IANA standard,

#CyberSecurity #InfoSec #RDP #Port3390 #WindowsServer Title: Troubleshooting Port 3390 (Alternative RDP) 3390 port

#cybersecurity #infosec #windows

Most people scan for 3389 (RDP). Smart attackers scan for .

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