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Port 1234 Details

known port assignments and vulnerabilities
threat/application/port search:
Port(s) Protocol Service Details Source
1234 tcp trojans Backdoor.Ultor [Symantec-2002-061316-4604-99] (2002.06.13) - remote access trojan. Affects Windows, listens on port 1111 or 1234.

Some other trojans using this port: SubSeven 2.0, Bagle.AF.

Port is also IANA registered for: Infoseek Search Agent
1234 udp games Command and Conquer Renegade

VLC media player default port for UDP/RTP stream.

The xdrDecodeString function in XNFS.NLM in Novell Netware 6.5 before SP8 allows remote attackers to cause a denial of service (abend) or execute arbitrary code via a crafted, signed value in a NFS RPC request to port UDP 1234, leading to a stack-based buffer overflow.
References: [CVE-2010-4227], [BID-46535]

Green Dam could allow a remote attacker to bypass security restrictions, caused by an error when handling UDP packets. By sending a specially-crafted request to UDP port 1234, an attacker could exploit this vulnerability to set the system time.
References: [XFDB-51513], [BID-35557], [OSVDB-55533], [SECUNIA-35664]

Janitza UMG 508, 509, 511, 604, and 605 devices allow remote attackers to obtain sensitive network-connection information via a request to UDP port (1) 1234 or (2) 1235.
References: [CVE-2015-3969], [XFDB-108584]
1234 udp VLC media player Default port for UDP/RTP stream (unofficial) Wikipedia
1234 tcp trojan KiLo, Ultors Trojan Trojans
1234 tcp hotline SANS
1234 tcp SubSevenJavaclient [trojan] SubSeven Java client SANS
1234 tcp UltorsTrojan [trojan] Ultors Trojan SANS
1234-1237,4000,5400,5009 udp applications Command and Conquer Red Alert Portforward
1234-1237 udp applications Command and Conquer Red Alert 2 Portforward
1234-1237 udp applications Command and Conquer Red Alert 2 Yuris Revenge Portforward
1234-1237,5009 udp applications Command and Conquer Red Alert Aftermath Portforward
1234-1237,5009 udp applications Command and Conquer Red Alert Counterstrike Portforward
1234-1237 udp applications Command and Conquer Renegade Portforward
1234-1237 udp applications Command and Conquer The Covert Operations Portforward
1234-1237,5009 udp applications Command and Conquer Tiberian Dawn 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
1140-1234,4000 tcp,udp applications Dune 2000 Portforward
1234-1237 udp applications Dune2000 Portforward
1234-1237 udp applications Emperor Battle for Dune Portforward
1234-1237 udp applications Nox Portforward
1234, 3658-3660, 6500, 27900, 28910, 3783, 6515, 6667, 13139, 28900, 29900-29901, 29920 tcp,udp applications Starwars Empire at War Portforward
1140-1234,4000 tcp,udp applications Tiberian Sun Portforward
1140,1234 udp applications Westwood Online Portforward
1140,1234,4000 tcp applications Westwood Online Portforward
1234-1237,4000,5009,5400 udp applications Xwis Portforward
1234 tcp hotline hotline Nmap
1234 tcp threat W32.Beagle Bekkoame
1234 tcp,udp threat The bindshell.c program puts a backdoor root shell on this port by default. This assumes that you've already been compromised by some other exploit and that the hacker uses the default port. Bekkoame
1234 tcp,udp search-agent Infoseek Search Agent IANA
30 records found
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Related ports: 21  1235  1236  1237  1239  

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External Resources
SANS Internet Storm Center: port 1234

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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