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Port 901 Details

known port assignments and vulnerabilities
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Port(s) Protocol Service Details Source
901 tcp trojans NetDevil - remote access trojan, 02.2002. Affects Windows 9x/Me/NT/2k/XP

Port IANA registered for SMPNAMERES

Also used by VMware Virtual Infrastructure Client, Samba SWAT tool, ISS RealSecure Sensor
901 tcp Samba Web Administration Tool (SWAT) (unofficial) Wikipedia
901 tcp,udp VMware Virtual Infrastructure Client (UDP from server being managed to management console) (unofficial) Wikipedia
901 tcp trojan Net-Devil, Pest Trojans
901 tcp,udp smpnameres SMPNAMERES IANA
901 tcp realsecure RealSecure sensor SANS
901 tcp samba-swat Samba SWAT tool SANS
901 tcp samba-swat Samba SWAT tool. Also used by ISS RealSecure. Nmap
901 tcp threat SWAT is an HTTP interface to SAMBA. Bekkoame
901 tcp,udp threat ISS RealSecure The IDS sensor listens on this port for communication from the console. Bekkoame
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Related ports: 902  903  

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External Resources
SANS Internet Storm Center: port 901

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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