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Port 9987 Details


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Port(s) Protocol Service Details Source
9987 udp applications TeamSpeak 3 server default (voice) port.

TS3 uses the following ports:
9987 UDP (default voice port)
10011 TCP (default serverquery port)
30033 TCP (default filetransfer port)
41144 TCP (default tsdns port)

TS3 also connects to: accounting.teamspeak.com:2008 (TCP for license checks) and weblist.teamspeak.com:2010 (UDP). TS3 weblist also uses ports 2011-2110 (UDP out, first available port in range).

Teamspeak Server is vulnerable to a denial of service, caused by multiple assertion errors in multiple commands. By sending a specially-crafted command to UDP port 9987, a remote attacker could exploit this vulnerability to cause the application to crash.
References: [XFDB-59521], [BID-40918], [SECUNIA-40230]
SG
9987 tcp,udp dsm-scm-target DSM/SCM Target Interface, registered 2006-08 IANA
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Related ports: 10011  30033  41144  

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External Resources
SANS ISC: port 9987

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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