When troubleshooting unknown open ports, it is useful to find exactly what services/processes are listening to them. UDP is often used with time-sensitiveĪpplications, such as audio/video streaming and realtime gaming, where dropping some packets is preferable to waiting for delayed data.

The message to process any errors and verify correct delivery. Like TCP, UDP is used in combination with IP (the Internet Protocol)Īnd facilitates the transmission of datagrams from one computer to applications on another computer,īut unlike TCP, UDP is connectionless and does not guarantee reliable communication it's up to the application that received Guaranteed communication/delivery is the key difference between TCP and UDP. TCP guarantees delivery of dataĪnd that packets will be delivered in the same order in which they were sent. To establish a connection and exchange streams of data. TCP ports use the Transmission Control Protocol, the most commonly used protocol Used port numbers for well-known internet services.

IANA is responsible for internet protocol resources, including the registration of commonly Ports are unsigned 16-bit integers (0-65535) that identifyĪ specific process, or network service. Port numbers in computer networking represent communication endpoints. References:, Ĭisco-xremote router configuration (unofficial)ĮTL Service Manager, registered 2002-03. Games using this port: Asheron's Call uses port 9001 UDP.īuffer overflow in the lm_tcp service in Invensys Wonderware InBatch 8.1 and 9.0, as used in Invensys Foxboro I/A Series Batch 8.1 and possibly other products, allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a crafted request to port 9001. Microsoft SharePoint authoring environment, Cisco-xremote router configuration, Tor network default, DBGp (TCP), HSQLDB default port (TCP). Citrix HTML5 video redirection WebSocketService listens on port 9001 TCP.

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