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Port 1863 Details

known port assignments and vulnerabilities
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Port(s) Protocol Service Details Source
1863 tcp,udp msnp Port used by MSN Messenger

W32.Mytob.IE@mm (2005.07.26) - a mass-mailing worm that opens a backdoor and lowers security settings on the compromised computer. It uses its own SMTP engine. Opens a backdoor and listens for remote commands on port 1863/tcp.

Backdoor.Kaitex.e also uses this port (TCP).

W32.Scrimge.E (2007.08.15) - a worm that spreads through Microsoft instant messaging clients and opens a back door on the compromised computer.

Xbox Live 360 also uses this port.
1863 tcp MSNP (Microsoft Notification Protocol), used by the .NET Messenger Service and a number of Instant Messaging clients (official) Wikipedia
1863 tcp,udp msnp MSNP IANA
1863 tcp,udp msnp MSN Messenger Protocol SANS
1863,5190,6901 udp applications MSN Messenger Portforward
1863,6891-6900,6901 tcp applications MSN Messenger Portforward
1863 tcp msnp MSN Messenger Nmap
1863 tcp threat Bifrose Bekkoame
1863 tcp threat W32.Mytob Bekkoame
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External Resources
SANS Internet Storm Center: port 1863

Well Known Ports: 0 through 1023.
Registered Ports: 1024 through 49151.
Dynamic/Private : 49152 through 65535.

TCP ports use the Transmission Control Protocol. TCP is the most commonly used protocol on the Internet and any TCP/IP network. Whereas the IP protocol deals only with packets, 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, a communications protocol for the Internet network, transport, and session layers. Like TCP (Transmission Control Protocol), UDP is used with IP (the Internet Protocol) and makes possible 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, 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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