WELL KNOWN PORT NUMBERS

PORT NO                     PROTOCOL              USAGE

21                                  FTP                         TRANSFERING FILES
22                                  SSH                        SECURE REMOTE ADMIN
23                                  TELNET                 REMOTE LOGIN
25                                  SMTP                     SENDING MAILS
69                                  TFTP                      TRANSFERING FILES (NO AUTH.)
80                                  HTTP                     WORLD WIDE WEB
110                                POP3                      RECIEVING MAILS
119                                NNTP                     READING AND POSTING NEWS
143                                IMAP                      RECIEVING MAILS
161                               SNMP                      NETWORK MANAGEMNET
162                               SNMPTRAP            NETWORK MANAGEMNET
179                               BGP                          ROUTING
213                               IPX                            DATA TRANSFER                         
389                               LDAP                        USER INFORMATION