Operating System reserves first 1024 ports for its internal usage and each port within 1024 port has been assigned for different protocols. When I say reserved it means that only Root/Administrator user can change the preferences. Here are the list of ports and their default assignments.
Port | Usage |
21 | FTP |
22 | SSH |
23 | Telnet |
80 | HTTP |
66 | Oracle SQL |
443 | HTTPS |
389 | LDAP/OID |
115 | SFTP |
143 | IMAP |
513 | RAW/Rlogin |
1521 | Database Listener |
8000 | Oracle Applications http port |
8100 | Oracle Application PLS port |
9000 | Oracle Applications forms server port |
More default ports to come.... Keep watching......
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