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IT Atlas

Port

Port 3389

Conventionally used by RDP. Port assignments are conventions, so confirm the actual listener before you write a rule around this number.

TCP · UDPEncrypted: Yes

Protocols on this port

RDP

Windows remote desktop

Security: Never expose to the internet; use a gateway with MFA

TCP / UDP · Encrypted: Yes

Where this port appears in the documentation

RDP

Remote Desktop Protocol delivers interactive Windows sessions over TCP/3389 and is a recurring ransomware entry point when exposed.

Exposure guidance

Decide reachability from the identity of the caller, not from the port number. If the service on this port carries credentials or administrative control, restrict it to an administrative network, require strong authentication, and log every session that reaches it.

Nearby ports

Port 3306Port 4500

In the knowledge graph

Open the interactive map centred on this entity to see everything it connects to and travel outwards from there.

Explore port 3389 in the knowledge graph