Important Port Number’s a System Admin Should Know..
Portnumber……..Service 22…………….SSH 25…………….SMTP 23…………….TELNET 53…………….DNS 80…………….HTTP 443……………HTTPS 110……………pop3 465……………SMTP(SSL) 143……………IMAP4 993……………IMAP4(SSl) 2082…………..cpanel 2083…………..cpanel(SSL) 3128…………..Squid 3306…………..MySql 5432…………..PortgreSQL