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Port 2000 Details

known port assignments and vulnerabilities
threat/application/port search:
Port(s) Protocol Service Details Source
2000 tcp callbook "RemoteAnywhere" installs a webserver on this port. NeWS/OpenWin (Sun's older variation of X-Windows) uses this port.

Lineage also uses this port.

A number of trojan horses/backdoors use this port: Der Spaeher, Fear, Force, GOTHIC Intruder, Insane Network, Last 2000, Real 2000, Remote Explorer 2000, Senna Spy Trojan Generator, Singularity
Backdoor.Fearic (2002.08) - remote access trojan, affects all current Windows versions, opens ports 2000, 3456, 8811.
Trojan.Esteems.D (2005.05.16) - trojan with keylogger capabilities. Uses port 2000/tcp to communicate with a remote host and send logged information.

Dark Colony game also uses port 2000 (TCP/UDP).

Unspecified vulnerability in the Session Border Controller (SBC) before 3.0(2) for Cisco 7600 series routers allows remote attackers to cause a denial of service (SBC card reload) via crafted packets to TCP port 2000.
References: [CVE-2009-0619], [BID-33975]

Port is also IANA registered for Cisco SCCP
2000 tcp,udp Cisco SCCP (Skinny) (official) Wikipedia
2000 tcp trojan A-trojan, Der Spaeher, Fear, Force, GOTHIC Intruder , Last 2000, Real 2000, Remote Explorer 2000, Remote Explorer Y2K, Senna Spy Trojan Generator, Singularity Trojans
2000 udp trojan GOTHIC Intruder , Real 2000, Remote Explorer 2000, Remote Explorer Y2K Trojans
2000 tcp,udp cisco-sccp Cisco SCCP IANA
2000 tcp,udp callbook SANS
2000 tcp DerSpaeher [trojan] Der Späher / Der Spaeher SANS
2000 tcp DerSpaeher [trojan] Der Späher / Der Spaeher SANS
2000 tcp InsaneNetwork [trojan] Insane Network SANS
2000 tcp Last2000 [trojan] Last 2000 SANS
2000 tcp RemoteExplorer2000 [trojan] Remote Explorer 2000 SANS
2000 tcp SennaSpy [trojan] Senna Spy Trojan Generator SANS
2000-2021,5050-5070 udp applications BT Communicator Portforward
2000-2001, 2038, 2050, 2051, 2069, 2085, 3010, 3030 tcp applications ICUII Portforward
2000-2002 tcp applications iSpQ VideoChat Portforward
2000,2003 tcp applications Lineage Portforward
80,2000 tcp applications Ports used by:

QSee QSD2304L
QSee QSD2316L
QSee QSDF8204
QSee QSTD2308L
QSee QSTD2408
QSee QSTD2416
QSee QSTD5304
2000 tcp,udp applications Remotely Anywhere Portforward
2000 tcp,udp callbook callbook Nmap
2000 tcp openwindows OpenWindows Neophasis
2000 tcp DerSpaeher [trojan] Der Spaeher Neophasis
2000 tcp threat Esteems Bekkoame
2000 tcp threat NeWS/OpenWin (Sun's older technology like X Windows) Bekkoame
2000 tcp threat The commercial remote-control program "RemotelyAnywhere" installs a webserver at this port. Bekkoame
2000 tcp,udp threat Der Spaher / Der Spaeher Bekkoame
2000 tcp,udp threat Feardoor Bekkoame
2000 tcp,udp threat Fearic Bekkoame
2000 tcp,udp threat Insane Network Bekkoame
2000 tcp,udp threat Last 2000 Bekkoame
2000 tcp,udp threat Remote Explorer 2000 Bekkoame
2000 tcp,udp threat Senna Spy Trojan Generator Bekkoame
31 records found
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Related ports: 1999  2003  3456  8811  

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External Resources
SANS Internet Storm Center: port 2000

Well Known Ports: 0 through 1023.
Registered Ports: 1024 through 49151.
Dynamic/Private : 49152 through 65535.

TCP ports use the Transmission Control Protocol. TCP is the most commonly used protocol on the Internet and any TCP/IP network. Whereas the IP protocol deals only with packets, 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, a communications protocol for the Internet network, transport, and session layers. Like TCP (Transmission Control Protocol), UDP is used with IP (the Internet Protocol) and makes possible 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, 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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