If you are connecting from outside your local network (e.g., from a coffee shop to your home), you must configure your router.
#SysAdmin #Windows #RDP #ITSupport
#cybersecurity #infosec #windows
: On a home or small business network, a router can only forward one specific port to one specific device. Using port 3390 allows a user to access a second computer remotely while keeping port 3389 open for the first.
Beyond the screen, "3390" appears in a more rugged, historical context. In Port de Grave 3390 port
, a feature that establishes a direct UDP-based transport between a client and a session host to improve performance and reliability. This is often configured through Group Policy. Alternative RDP Port: Administrators often change the listening port from 3389 to 3390 to reduce the visibility of the service to automated internet bots that specifically scan for the default 3389. Port Forwarding: When connecting to multiple computers on a single network from the internet, a router can be configured to forward port 3389 to the first machine and port 3390 to the second. Virtual Environments: It is sometimes used by default in virtual machine managers like
Once the server is configured, you cannot connect using just the IP address. You must specify the port. If you are connecting from outside your local network (e
By default, Windows Remote Desktop uses . However, system administrators often change this port to 3390 (or other high ports) to bypass router conflicts or to add a layer of "security through obscurity" against automated bots scanning the default port.
#CyberSecurity #InfoSec #RDP #Port3390 #WindowsServer Beyond the screen, "3390" appears in a more
In the "Computer" field, use a colon : to separate the IP and port.
If you’ve ever changed your RDP port from 3389 to 3390 thinking it was "security through obscurity," listen up: