Determining IP Port Utilization

The local address has the port number following the colon (:). The definition of which services get which ports is in \winnt\system32\drivers\etc\services.

The real "official" definition if in RFC 1060, if you are up to reading the standards. The copy on your system is basically only the ones your system might be expected to need.

Note that ports with high numbers may get assigned dynamically. Some processes, such as ftp, connect on a standard port, then negotiate a high-numbered port for passing data.

Hope this helps.

I use a utility called LPS (Local Port Scanner) from a company called JPSoft. You can find them at www.jpsoft.dk. I found the utility at Shareware.com. It will scan the ports on the server and let you know what ports are open and what program uses them. Works great to lock down server.

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