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Port 3389 Details
known port assignments and vulnerabilities
threat/application/port search:
| Port(s) |
Protocol |
Service |
Details |
Source |
| 3389 |
tcp |
rdp |
Port is IANA registered for Microsoft WBT Server, used for Windows Remote Desktop and Remote Assistance connections (RDP - Remote Desktop Protocol). Also used by Windows Terminal Server.
See also: MS Security Bulletin [MS02-051] and [MS01-040].
Trojans using this port: Backdoor.Win32.Agent.cdm [Symantec-2005-050114-4234-99], TSPY_AGENT.ADDQ
This port is vulnerable to Denial of Service Attack Against Windows NT Terminal Server. A remote attacker can quickly cause a server to reach full memory utilization by creating a large number of normal TCP connections to port 3389. Individual connections will timeout, but a low bandwidth
continuous attack will maintain a terminal server at maximum memory utilization and prevent new connections from a legitimate source from taking place. Legitimate new connections will fail at this point with an error of either a connection timeout, or the terminal server has ended the connection.
References: [CVE-1999-0680]
A vulnerability exists in the Remote Desktop Protocol (RDP), where an attacker could send a specially crafted sequence of packets to TCP port 3389 which can result in RDP to accessing an object in memory after it has been deleted.
References: [CVE-2012-2526]
Zmodo Geovision also uses port 3389 (TCP/UDP) |
SG
|
| 3389 |
tcp |
|
Microsoft Terminal Server (RDP) officially registered as Windows Based Terminal (WBT) (unofficial) |
Wikipedia
|
| 3389 |
tcp,udp |
ms-term-services |
MS Terminal Services |
SANS
|
| 21, 80, 3389, 4550, 5550, 6550, 9650 |
tcp |
applications |
GeoVision TwinDVR with Webcam |
Portforward
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| 21,80,3389,4550,5550,6550 |
tcp |
applications |
GeoVision Webcam |
Portforward
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| 3389 |
tcp,udp |
applications |
Remote Desktop |
Portforward
|
| 3389 |
tcp |
applications |
Terminal Services |
Portforward
|
| 3389 |
tcp,udp |
applications |
Windows 2000 Terminal Server |
Portforward
|
| 3389 |
tcp,udp |
ms-term-serv |
Microsoft Remote Display Protocol |
Nmap
|
| 3389 |
tcp,udp |
ms-wbt-server |
MS WBT Server |
IANA
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10 records found
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External Resources
SANS Internet Storm Center: port 3389
Notes:
Port numbers in computer networking represent communication endpoints. Ports are unsigned 16-bit integers (0-65535) that identify
a specific process, or network service. IANA is responsible for internet protocol resources, including the registration of commonly
used port numbers for well-known internet services.
Well Known Ports: 0 through 1023.
Registered Ports: 1024 through 49151.
Dynamic/Private : 49152 through 65535.
TCP ports use the Transmission Control Protocol, the most commonly used protocol
on the Internet and any TCP/IP network. TCP enables two hosts
to establish a connection and exchange streams of data. TCP guarantees delivery of data
and that packets will be delivered in the same order in which they were sent.
Guaranteed communication/delivery is the key difference between TCP and UDP.
UDP ports use the Datagram Protocol. Like TCP, UDP is used in combination with IP (the Internet Protocol)
and facilitates the transmission of datagrams from one computer to applications on another computer,
but unlike TCP, UDP is connectionless and does not guarantee reliable communication; it's up to the application that received
the message to process any errors and verify correct delivery. UDP is often used with time-sensitive
applications, such as audio/video streaming and realtime gaming, where dropping some packets is preferable to waiting for delayed data.
When troubleshooting unknown open ports, it is useful to find exactly what services/processes are listening to them.
This can be accomplished in both Windows command prompt and Linux variants using the "netstat -aon" command.
We also recommend runnig multiple anti-virus/anti-malware scans to rule out the possibility of active malicious software.
For more detailed and personalized help please use our forums.
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