Application protocols. well-known ports

Name TCP or UDP Port Use
HTTP tcp 80 web
HTTPS tcp 443 secure SSL web
FTP tcp 21 (control) 20 (data) file transfer
TFTP udp 69 no password, no dir
Telnet tcp 23 remote login
SSH tcp 22 secure remote login
SMTP tcp 25 sending email
POP3 tcp 110 retrieving email
IMAP tcp 143 retrieving email at server
DNS udp 53 name resolution
DNS tcp 53 zone transfer
DHCP udp 67 server
DHCP udp 68 client
SNMP udp 161, 162 trap network management
NTP udp 123 time server
RIP udp 520 interior routing
BGP tcp 179 exterior routing
MS both? 445 ?
MS NetBIOS tcp? 137,138,139 name service (broadcast vs WINS server)
PPTP tcp 1723 VPN
LDAP tcp 389 directory services