Port # for Kerberos- a strong secure network authentication protocol designed and created by MIT that win2k, 2003, 08, XP UNIX, Linux and Novell use for logging in a network
88
Port # POP3 Post Office Protocol 3
110
Port # NNTP Network News Transfer Protocol
119
Port # for NTP Network Time Protocol
123
Port # for IMAP Internet Message Access Protocol
143
Port # for SNMP Simple Network Management Protocol
161
Port # for LDAP Lightweight Directory Access Protocol
389
Port # for SSL Secure Socket Layer
443
Port # for DHCP Dynamic Host Configuration Protocol
546/547
Port # for WINS Windows Internet Naming Service
1512
Port # for L2TP Layer Two (2) Tunneling Protocol
1701
Port # for PPTP Point-to-Point Tunneling Protocol- very impt used for creating Virtual Private Networks (VPNs)
1723
Port # for RADIUS Remote Authentication Dial-In User Service