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Port 4502 Details

known port assignments and vulnerabilities
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Port(s) Protocol Service Details Source
4502-4534 tcp silverlight Ports are used by the Microsoft Silverlight plugin. Silverlight can add graphics, interactive and multimedia functionality to the Web browser.

Websites with Silverlight-compatible content will send requests to the computer and access the policy file on port 943. Once the policy file is read, ports 4502-4534 can be used to send data to the Web browser.
4502 tcp a25-fap-fgw Multiple Cogent products are vulnerable to a denial of service, caused by a NULL pointer dereference when handling formatted text commands. By sending a specially-crafted command containing a backslash to TCP ports 4502 or 4503, a remote attacker could exploit this vulnerability to cause the application to crash.
References: [XFDB-83280], [BID-58910]

A25 (FAP-FGW) [ThreeGPP2] (SCTP, IANA official)
4502 sctp a25-fap-fgw A25 (FAP-FGW), registered 2012-01-11 IANA
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Related ports: 4503  

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External Resources
SANS Internet Storm Center: port 4502

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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