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Port 31 Details


known port assignments and vulnerabilities
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Port(s) Protocol Service Details Source
31 tcp msg-auth MSG Authentication

Delta Force also uses this port.

The following trojand/backdoors also use this port: Agent 31, Agent 40421, Hackers Paradise (ports 31, 456), Masters Paradise, Skun
SG
31 tcp trojan Agent 40421, Masters Paradise, Skun Trojans
31 tcp Agent31 [trojan] Agent 31 SANS
31 tcp HackersParadise [trojan] Hackers Paradise SANS
31 tcp MastersParadise [trojan] Masters Paradise SANS
31 tcp Agent 31, Hackers Paradise, Masters Paradise Bekkoame
31 tcp,udp msg-auth MSG Authentication IANA
7 records found
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Related ports: 3  35  310  683  

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External Resources
SANS ISC: port 31

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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