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Port 5003 Details

known port assignments and vulnerabilities
threat/application/port search:
Port(s) Protocol Service Details Source
5003 tcp trojans W32.Spybot.IVQ (01.26.2005) - Worm with distributed denial of service and backdoor capabilities. Spreads through network shares, MySQL (port 3306)/MS SQL (port 1433) servers with weak passwords, and by exploiting system vulnerabilities (ports 135, 445).

Polycom MGC 25 allows remote attackers to cause a denial of service (crash) via a large number of "user" requests to the control port 5003, as demonstrated using the blast TCP stress tester.
References: [CVE-2003-0556]

Opens a backdoor on one or more of these ports: 5002, 5003, 1927, 1930.
5003 udp watchguard WatchGuard WebBlocker Server uses port 5003 UDP to interact with Firebox devices. SG
5003 tcp,udp FileMaker (official) Wikipedia
5003 tcp fmpro-internal FileMaker Inc. - Proprietary transport SANS
5003 udp fmpro-internal FileMaker Inc. - Proprietary name binding SANS
5003 tcp,udp applications Digi-Watcher Portforward
5003 tcp,udp applications FileMaker Pro Portforward
5003 tcp,udp filemaker Filemaker Server - Nmap
5003 tcp threat W32.Spybot Bekkoame
5003 tcp fmpro-internal FileMaker, Inc. - Proprietary transport Bekkoame
5003 udp fmpro-internal FileMaker, Inc. - Proprietary name binding Bekkoame
5003 tcp fmpro-internal "FileMaker, registered [Clay_Maeckel] IANA
5003 udp fmpro-internal "FileMaker, registered [Clay_Maeckel] IANA
5000-5010 udp applications Yahoo Messenger Voice Chat Portforward
5000-5010 udp applications Yahoo Voice Chat Portforward
15 records found
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Related ports: 1927  1930  5002  

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External Resources
SANS Internet Storm Center: port 5003

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.

Please use the "Add Comment" button below to provide additional information or comments about port 5003.
  User Reviews/Comments:
by john - 2009-05-19 14:18
One more to add to the list: This is the default port for Numara Asset Manager
by anonymous - 2016-02-17 06:15
The WatchGuard WebBlocker Server uses UDP port 5003 to interact with the FIrebox device when looking up URL categories etc
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