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Port 20000 Details
known port assignments and vulnerabilities
threat/application/port search:
| Port(s) |
Protocol |
Service |
Details |
Source |
| 20000 |
tcp,udp |
dnp |
GlassWire service uses port 7010 by default, may also listen to port 20000.
QuickTime Streaming Server 4 also uses ports 10000-20000 (TCP).
Ultimate Baseball Online Client uses ports 20000-22200 (UDP)
Usermin, Web-based user tool, OpenWebNet - communications protocol used in Bticino products
Trojans that use this port: Millenium, PSYcho Files, XHX
The DNP Master Driver in Software Toolbox TOP Server before 5.12.140.0 allows remote attackers to cause a denial of service (master-station infinite loop) via crafted DNP3 packets to TCP port 20000 and allows physically proximate attackers to cause a denial of service (master-station infinite loop) via crafted input over a serial line.
References: [CVE-2013-2804]
The Kepware DNP Master Driver for the KEPServerEX Communications Platform before 5.12.140.0 allows remote attackers to cause a denial of service (master-station infinite loop) via crafted DNP3 packets to
TCP port 20000 and allows physically proximate attackers to cause a denial of service (master-station infinite loop) via crafted input over a serial line.
References: [CVE-2013-2789]
The master-station DNP3 driver before driver19.exe, and Beta2041.exe, in IOServer allows remote attackers to cause a denial of service (infinite loop) via crafted DNP3 packets to TCP port 20000.
References: [CVE-2013-2790]
IOServer is vulnerable to a denial of service, caused by improper handling of TCP packets within DNP3 drivers. By sending a specially-crafted packet to TCP port 20000, a remote attacker could exploit this vulnerability to cause the system to enter into an infinite loop.
References: [BID-60450], [CVE-2013-2783]
A denial of service vulnerability exists in Schneider Electric's MiCOM Px4x (P540 range excluded) with legacy Ethernet board, MiCOM P540D Range with Legacy Ethernet Board, and MiCOM Px4x Rejuvenated could lose network communication in case of TCP/IP open requests on port 20000 (DNP3oE) if an older TCI/IP session is still open with identical IP address and port number.
References: [CVE-2018-7758]
DNP (IANA official) |
SG
|
| 20000 |
tcp,udp |
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DNP (Distributed Network Protocol), a protocol used in SCADA systems between communicating RTU's and IED's (official) |
Wikipedia
|
| 20000 |
tcp,udp |
|
Usermin, Web-based user tool (unofficial) |
Wikipedia
|
| 20000 |
tcp |
trojan |
Millenium, PSYcho Files, XHX |
Trojans
|
| 20000 |
tcp |
Millenium |
[trojan] Millenium |
SANS
|
| 20000 |
udp |
dnp |
DNP |
SANS
|
| 20000-20010 |
udp |
applications |
Cal Ripkens Real Baseball |
Portforward
|
| 20000-21000 |
udp |
applications |
Ground Control |
Portforward
|
| 15001, 15101, 15200, 20000-21000, 25451 |
tcp |
applications |
Ground Control |
Portforward
|
| 20000-21000 |
udp |
applications |
Ground Control with Chat Rooms |
Portforward
|
| 15001, 15101, 15200, 20000-21000, 25000-25499 |
tcp |
applications |
Ground Control with Chat Rooms |
Portforward
|
| 20000-20019 |
tcp |
applications |
ICQ |
Portforward
|
| 69,5060-5061,10000-20000 |
udp |
applications |
Viatalk |
Portforward
|
| 20000 |
tcp,udp |
dnp |
DNP |
IANA
|
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14 records found
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jump to:
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Related ports: 7010 19999 20001 22200
« back to SG Ports
External Resources
SANS ISC: port 20000
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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