Join the Conversation

To sign in, use your existing MySonicWall account. To create a free MySonicWall account click "Register".

Is this port necessary for RDP to function over a VPN?

I have two NSA2650s at different geographical locations connected through a VPN. When I RDP from one client to another through the VPN, I see the normal port for RDP, 3389, but it's paired with another port, 55669. Where is this second port being generated from? I've been tasked with closing\blocking all non-critical business ports. Is this port generated dynamically at one of the firewalls?


Category: Firewall Management and Analytics

Best Answer

    ArkwrightArkwright All-Knowing Sage ✭✭✭✭
    Answer ✓

    The client randomly generates the source port. The port is not "open" in any meaningful sense. It will not accept new connections from anywhere, it will only accept packets from the destination host:port.

    This is not specific to RDP, this is how TCP works.


Sign In or Register to comment.