Commonly used Port Number

Below are  the list of common protocol and their-more-or-less "standard" port number.(Ports are TCP unless otherwise noted.)

 

. DHCP :- Port 67 (UDP)

. DNS :- 53 (UDP or TCP)

. Echo:- Port 7

. FTP :- Port 21 (Data channel for active ftp:- 20)

. Gopher :- Port 70

. HTTP :- Port 80

. HTTPS:- Port 443

. IKE :- Port 500 (UDP)

. IMAP :- Port 143

. IMAP (SSL) :- Port 993

. POP3 :- Port 110

. POP3 (SSL) :- Port 995

. Remote Desktop (RDP) Terminal Service :- Port 3389

. Rtelnet :- Port 107

. SMTP :- Port 25

. SNMP :- Port 161

. SQL Server :- Port 1433

. SQL Probe :- Port 1434 (UDP)

. Telnet :- Port 23

. TFTP :- Port 69

. UUCP :- Port 540

. Whois :- Port 43