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Port 4000 Details

known port assignments and vulnerabilities
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Port(s) Protocol Service Details Source
4000 tcp,udp trojans Trojan.Peacomm [Symantec-2007-011917-1403-99] (2007.01.19) - trojan horse that drops a system driver which injects some payload and hidden threads directly into the services.exe process, using a sophisticated technique. Once infected, it opens a backdoor to download other malicious programs. Uses UDP ports 4000, 7871, 11271

Applications: RemoteAnything, Videon Digital Linux DVR (TCP), Abacast (TCP)

Malware: Connect-Back Backdoor, Psyber Streaming Server trojan, Skydance trojan

Games that use this port: Blizzard Battlenet, Diablo II, Command and Conquer Red Alert (UDP), Warcraft II (UDP), Tiberian Sun, Dune 2000 (UDP)

The Festo CECX-X-C1 Modular Master Controller with CoDeSys and CECX-X-M1 Modular Controller with CoDeSys and SoftMotion do not require authentication for connections to certain TCP ports, which allows remote attackers to (1) modify the configuration via a request to the debug service on port 4000 or (2) delete log entries via a request to the log service on port 4001.
References: [CVE-2014-0769]

A vulnerability in multiple ISS products can be exploited to compromise a vulnerable system. The vulnerability is caused due to a boundary error in the PAM (Protocol Analyses Module) component within a routine used for monitoring ICQ server responses. This can be exploited to cause a buffer overflow by sending a specially crafted response packet with a source port of 4000/UDP to the broadcast address of a network with vulnerable systems.
References: [SECUNIA-11073]

OSRAM SYLVANIA Osram Lightify Home before 2016-07-26 allows remote attackers to execute arbitrary commands via TCP port 4000.
References: [CVE-2016-5053], [XFDB-125040]

Moxa EDR-810 is vulnerable to a denial of service, caused by a flaw in the Server Agent functionality. By sending a specially-crafted packet to port 4000, an attacker could exploit this vulnerability to cause the system to crash.
References: [CVE-2017-14438], [XFDB-141667]
4000 tcp,udp Diablo II game (unofficial) Wikipedia
4000 tcp trojan Remote Anything, SkyDance Trojans
4000 tcp Connect-BackBackdoor [trojan] Connect-Back Backdoor SANS
4000 tcp SkyDance [trojan] SkyDance SANS
4000 tcp,udp terabase Terabase SANS
4000,6112 tcp applications Blizzard Battlenet Portforward
1234-1237,4000,5400,5009 udp applications Command and Conquer Red Alert Portforward
1234-1237,4000,5400 udp applications Command and Conquer Tiberian Sun Portforward
1234-1237,4000,5400 udp applications Command and Conquer Tiberian Sun Firestorm Portforward
4000,6112 tcp applications DiabloII Portforward
1140-1234,4000 tcp,udp applications Dune 2000 Portforward
4000 tcp,udp applications Eclipse Portforward
3999-4000 tcp applications Remote Anything Portforward
1140-1234,4000 tcp,udp applications Tiberian Sun Portforward
80,1433,4000,11111 tcp applications Video Insight Server Portforward
4000 tcp,udp applications Warp Pipe Portforward
1140,1234,4000 tcp applications Westwood Online Portforward
1234-1237,4000,5009,5400 udp applications Xwis Portforward
4000 tcp applications Portforward
4000 tcp remoteanything neoworx remote-anything slave remote control Nmap
4000 udp icq AOL ICQ instant messaging clent-server communication Nmap
4000 tcp circlemud CircleMUD default server port Neophasis
4000 udp icq ICQ server port Neophasis
4000 udp threat Command and Conquer (UDP) The game "Command and Conquer" by Weswood Studios uses this UDP port. Also uses UDP port 5400. Bekkoame
4000 udp threat ICQ uses this as a control port. Bekkoame
4000 udp threat W32.Witty Bekkoame
4000 tcp,udp terabase Terabase IANA
28 records found
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Related ports: 1170  1509  3724  3800  5400  6112  7871  11271  

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External Resources
SANS Internet Storm Center: port 4000

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.

Please use the "Add Comment" button below to provide additional information or comments about port 4000.
  User Reviews/Comments:
by anonymous - 2016-04-08 18:25
App: Norwegian iConcierge
Port: 4000
Android Service Name: neoworx remote-anything slave remote control
Open port found by: Fing
App using port found by: OS Monitor
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