Do you know what TCP/IP ports 427 and 524 are used for?
Articles and Tips: qna
15 May 2000
Q.
Dear Ab-end: Do you know what TCP/IP ports 427 and 524 are used for? I've just put up a personal firewall on my PC so I could control my DSL (Digital Subscriber Line) connection, but I keep getting stuff from these ports and I'm wondering what they are.
--Portly in Portland
A.
Dear Portly: Robert Hannan of Novell Consulting provides the following list:
TCP 524 - NCP Requests - Source port will be a high port (1024-65535) UDP 524 - NCP for time synchronization - Source port will be a high port UDP 123 - NTP for time synchronization - Source port will be the same UDP 427 - SLP Requests - Source port will be the same (427) TCP 427 - SLP Requests - Source port will be the same (427) TCP 2302 - CMD - Source port will be a high port UDP 2645 - CMD - Source port will be the same (2645)
For a list of all well-known ports, refer to: http://www.con.wesleyan.edu/~triemer/network/docservs.html
* Originally published in Novell AppNotes
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