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RDP connection allowed with non RDP port

A.Hruskach
By A.Hruskach
in Networking
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Posted

We have Windows Server 2012 R2 that has RDP port set as 3391. Somehow, some way, unknown external ip addresses are connecting to rdp and successfully establishing a connection (they dont pass credential authentication though), all with non RDP ports... How is this possible? We have RDPGuard, windows firewall on server, and unifi firewall....

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What other ports are you exposing to the internet? I would NEVER have RDP and SMB open to internet, even if you have some sort of firewall or rate limiter behind it.

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Sounds like someone has done some port forwarding in your firewall.

 

Definitely not best practice for RDP to be open to the internet.

Desktop: Intel i7-13700K / Asus ROG Strix  z690-e / Nvidia 4080 FE / 32GB DDR5 Corsair Dominator / 2TB  WD SN850x  / 48" Lg C2 & 27" Asus ProArt

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